Digicom 3911 manuale d’uso

COMSPHERE 3900 SERIES MODEMS MODELS 3910 AND 391 1 POINT -T O-POINT/MUL TIPOINT INST ALLA TION AND OPERA TION MANUAL Document No. 3910-A2-GN32-41 February 2002 Rurstraße 4 D -41564 Kaarst 1 Telefon (02131) 6 69 08 - 0 Telefax (02131) 66 71 48 e - mail: info@digicomm.de Internet: www.digicomm.de[...]

COMSPHERE 3900 Series Modems A February 2002 3910-A2-GN32-41 COMSPHERE 3900 Series Modems Models 3910 and 391 1 Point-to-Point/Multipoint Installation and Operation Manual 3910-A2-GN32-41 6th Edition (February 2002) Changes and enhancements to the product and to the information herein will be documented and issued as a new release to this manual. F[...]

Safety Instructions B 3910-A2-GN32-40 September 1998 Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. This product is intended to be used with a three-wire grounding type plug – a plug which has a grounding pin. This is a safety feature. Equipment grounding i[...]

COMSPHERE 3900 Series Modems C September 1998 3910-A2-GN32-40 Notices THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPL Y WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO P ART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONM[...]

i 3910-A2-GN32-40 September 1998 T able of Contents Preface Objectives and Reader Assumptions ix . . . . . . . . . . . . . . . . . . . . . . . . . How to Use this Manual ix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ordering Info[...]

COMSPHERE 3900 Series Modems ii September 1998 3910-A2-GN32-40 3. DCP Operation Overview 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Control Panels 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators 3-3 . . . . . . . . . . . . . . . . . . . . . . . .[...]

T able of Contents iii 3910-A2-GN32-40 September 1998 10. Call Setup Branch Overview 10-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dial 10-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disconnect 10-3 . . . . . . . . . . . . . . . . . . . . [...]

COMSPHERE 3900 Series Modems iv September 1998 3910-A2-GN32-40 Appendices A. Menu T ree A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B. T roubleshooting B-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. Pin Assignments C-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

T able of Contents v 3910-A2-GN32-40 September 1998 List of Figures Figure Page 1-1 Model 3910 1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Model 391 1 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Model 3[...]

COMSPHERE 3900 Series Modems vi September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

T able of Contents vii 3910-A2-GN32-40 September 1998 List of T ables T able Page 1-1 T echnical Specifications for 391x Series Modems 1Ć8 . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Model 3910 and Model 391 1 DCP LEDs 3-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 SDCP LEDs 3-5 . . . . . . . . . . . . . . . . [...]

COMSPHERE 3900 Series Modems viii September 1998 3910-A2-GN32-40 T able Page D-1 V .25bis Commands D-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2 V .25bis Response Messages D-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1 ASCII Characters E-1[...]

ix 3910-A2-GN32-40 September 1998 Preface Objectives and Reader Assumptions This manual describes how to install and operate the COMSPHERE r 391x Series standalone and carrier-mounted modems. This manual assumes that you have a basic understanding of modems and their operation. How to Use this Manual Chapter 1 provides technical specifications, inf[...]

COMSPHERE 3900 Series Modems x September 1998 3910-A2-GN32-40 Appendix C provides EIA-232-D and VF TELCO pin assignments. Appendix D provides V .25bis dialing information. Appendix E provides an ASCII translation chart. Appendix F provides a list of all default configuration options available for the factory preset configurations. Appendix G provid[...]

1-1 3910-A2-GN32-40 September 1998 Introduction Overview The COMSPHERE 391x Series modems, a new generation of full-feature, high-speed modems, offer reliable asynchronous and synchronous operation over leased-line or dial networks. The 391x Series modems ’ unique software defineability allows for the addition of future enhancements, whether it i[...]

COMSPHERE 3900 Series Modems 1-2 September 1998 3910-A2-GN32-40 Multipoint Applications In multipoint applications, leased-line circuits are used for time sharing the same front-end processor (FEP) port with multiple remote locations. The FEP (via the control modem) regulates traffic on the line by continuously polling the tributary DTE(s) in a pre[...]

Introduction 1-3 3910-A2-GN32-40 September 1998 Standalone Model 3910 4-Wire/2-Wire Modem The standalone Model 3910 modem (Figure 1-1) is capable of either 4-wire/2-wire leased-line or dial operation. The modem is controlled using either A T commands or the diagnostic control panel (DCP). The DCP consists of a liquid crystal display (LCD), three fu[...]

COMSPHERE 3900 Series Modems 1-4 September 1998 3910-A2-GN32-40 Carrier-Mounted Model 391 1 4-Wire/2-Wire Modem The carrier-mounted Model 3911 modem (Figure 1-2) is capable of either 4-wire/2-wire leased-line or dial operation and installs into a COMSPHERE 3000 Series Carrier . The Model 391 1 ’ s faceplate has 16 LED status indicators for displa[...]

Introduction 1-5 3910-A2-GN32-40 September 1998 The Model 391 1 derives ac power from the COMSPHERE 3000 Series Carrier ’ s backplane, which is a common bus to all devices installed in the carrier . The user interface to any Model 391 1 is through the shared diagnostic control panel (SDCP), an optional feature which operates in a manner similar t[...]

COMSPHERE 3900 Series Modems 1-6 September 1998 3910-A2-GN32-40 7. If you experience trouble with this equipment, please contact your sales or service representative (as appropriate) for repair or warranty information. If the product needs to be returned to the company service center for repair , contact them directly for return instructions using [...]

Introduction 1-7 3910-A2-GN32-40 September 1998 Canada NOTICE TO THE USERS OF THE CANADIAN PUBLIC SWITCHED TELEPHONE NETWORK The Canadian Department of Communications label identifies certified equipment. This certification means that the equipment meets certain telecommunications network protective, operational and safety requirements. The Departm[...]

COMSPHERE 3900 Series Modems 1-8 September 1998 3910-A2-GN32-40 T echnical Specifications T able 1-1 shows the technical specifications for the 391x Series modems. T able 1-1 (1 of 3) T echnical Specifications for 391x Series Modems Specifications Description APPROV ALS FCC Part 15 Class A FCC Part 68 Registration Number: (See label on modem) UL Mo[...]

Introduction 1-9 3910-A2-GN32-40 September 1998 T able 1-1 (2 of 3) T echnical Specifications for 391x Series Modems Specifications Description ENVIRONMENT Operating T emperature 32 ° F (0 ° C) to 122 ° F (50 ° C) Relative Humidity 5% to 90% (noncondensing) Shock and Vibration Withstands normal shipping Storage T emperature – 4 ° F ( – 20 [...]

COMSPHERE 3900 Series Modems 1-10 September 1998 3910-A2-GN32-40 T able 1-1 (3 of 3) T echnical Specifications for 391x Series Modems Specifications Description DA T A RA TES Leased Line 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400 1200 bps Dial Line 19200, 16800, 14400, 12000, 9600, 7200, 4800, 2400, 1200, 600, 300 bps ERROR CONTROL ITU-T V [...]

2-1 3910-A2-GN32-4 1 February 2002 Modem Installation Overview This chapter provides a list of equipment supplied with the modem as well as a list of customer supplied equipment. In addition, it describes how to install and remove the 391x Series modem, and how to select a factory preset configuration using either the DCP or the A T command set. 39[...]

COMSPHERE 3900 Series Modems 2-2 September 1998 3910-A2-GN32-40 Customer-Supplied Equipment The following customer-supplied equipment is required to complete a data communications system using the Model 3910 modem: • A DTE with an available EIA-232-D serial port. • A standard EIA-232-D cable with a DB-25-P (plug) connector at one end to attach [...]

Modem Installation 2-3 3910-A2-GN32-40 September 1998 Connecting Cables to the Model 3910 Modems Figure 2-1 shows how Model 3910 modems are connected to certain TELCO jack types using the appropriate cables. For pin assignments, refer to Appendix C, Pin Assignments . 8-POSITION, 8-CONDUCTOR PLUG FOR LEASED-LINE NETWORK OPERA TION 6-POSITION, 4-COND[...]

COMSPHERE 3900 Series Modems 2-4 September 1998 3910-A2-GN32-40 DTE Connection Use the following procedures to connect the EIA-232-D cable from the modem to the DTE: 1. Make sure the modem ’ s rear panel power switch is OFF . 2. Connect the DB-25-P (plug) connector on the cable to the DB-25-S (socket) connector labeled DTE (Figure 2-1) on the mod[...]

Modem Installation 2-5 3910-A2-GN32-40 September 1998 Network Management System Connection For the Model 3910, use the following procedures to connect the modem to the network management system interface: 1. Insert the sub-miniature, 4-conductor modular plug of the 3600 Hubbing Device into the jack labeled NMS (Figure 2-1). Refer to Document Number[...]

COMSPHERE 3900 Series Modems 2-6 September 1998 3910-A2-GN32-40 Selecting Factory Configuration Options After the modem passes the power-up self-test, configure it for operation using one of the six factory preset configurations. The 391x Series modems have six factory preset templates that contain the most commonly used configuration options (stra[...]

Modem Installation 2-7 3910-A2-GN32-40 September 1998 6. Press the key until the appropriate configuration area appears on the LCD, then press the corresponding function key to select your choice. (Saving configuration options to the Active (Saved) configuration area automatically saves them to the Active (Operating) configuration area.) The LCD di[...]

COMSPHERE 3900 Series Modems 2-8 September 1998 3910-A2-GN32-40 T o change a factory template using A T commands, perform the following steps. For more information on changing factory templates using A T commands, refer to Chapter 14, AT Command Set and S-Registers . 1. Use the A T&F&W command to load the appropriate factory configuration t[...]

Modem Installation 2-9 3910-A2-GN32-40 September 1998 Removing and Replacing Model 3910 Modems T o remove and replace a Model 3910 modem, perform the following steps: 1. Make sure the modem is offline, and press the modem ’ s rear panel power switch to the OFF position. 2. Disconnect the power cord from the ac power outlet, and then disconnect th[...]

COMSPHERE 3900 Series Modems 2-10 September 1998 3910-A2-GN32-40 Figure 2-2. Installing a Model 391 1 Modem 2. At the front of the carrier , hold the modem vertically , with the latch on its faceplate in the open position, and insert it into the top and bottom card guides of one of the slots numbered 1 – 16 (Figure 2-2). Slide the modem into the [...]

Modem Installation 2-1 1 3910-A2-GN32-40 September 1998 5. Press the Select key to place the SDCP in direct communication with the selected modem. The LCD displays the T op-Level menu for the selected modem. In addition, the Front Panel LED on the modem ’ s faceplate and the OK LED on the SDCP light. 6. Once you have determined that the modem is [...]

COMSPHERE 3900 Series Modems 2-12 September 1998 3910-A2-GN32-40 Removing and Replacing Model 391 1 Modems CAUTION If the Model 391 1 is removed from the carrier , always use a ground strap when handling the modem. Always store the Model 391 1 in an antistatic bag when it is removed from the carrier . It is not necessary to power down the carrier t[...]

3-1 3910-A2-GN32-40 September 1998 DCP Operation Overview This chapter describes how to use the diagnostic control panel (DCP) of the 391x Series modem. It also describes how to select and use each branch of the T op-Level menu tree. Diagnostic Control Panels There are two types of diagnostic control panels (DCP), the DCP on the standalone Model 39[...]

COMSPHERE 3900 Series Modems 3-2 September 1998 3910-A2-GN32-40 Model 3910 Diagnostic Control Panel The diagnostic control panel (DCP) of the Model 3910 modem (Figure 3-1) contains status indicators, pushbutton-type keys, an LCD, and speaker grill. PWR ALRM CTS TXD LSD RXD TEST RA TE 105 106 103 109 108 142 COMSPHERE 3910 496-14174-01 F1 F2 F3 SQ R[...]

DCP Operation 3-3 3910-A2-GN32-40 September 1998 Status Indicators The 391x Series modems ’ status indicators continuously provide information on the modem ’ s operating condition. All of the status indicators on the Model 3910 appear on the DCP (Figure 3-1), whereas the status indicators for the carrier-mounted Model 391 1 are located on the M[...]

COMSPHERE 3900 Series Modems 3-4 September 1998 3910-A2-GN32-40 The standalone Model 3910 modem ’ s DCP has 13 light-emitting diodes (LEDs), and the carrier-mounted Model 391 1 has 16 LEDs. These LEDs are listed and described in T able 3-1. LEDs specific to one model type have the appropriate model number shown in the table. T able 3-1 Model 3910[...]

DCP Operation 3-5 3910-A2-GN32-40 September 1998 The SDCP LEDs are listed and described in T able 3-2. T able 3-2 SDCP LEDs Label Color Indicates OK green Power is ON and the modem is capable of operating. Alarm red The modem has detected a problem with its operation. For example, the modem failed a self-test. BckUp yellow The modem, originally con[...]

COMSPHERE 3900 Series Modems 3-6 September 1998 3910-A2-GN32-40 LCD Display The LCD consists of a top line and bottom line, with each displaying a maximum of 16 characters at a time. If more information is available on the LCD than what is currently displayed, an indicator appears in the top right or bottom right-hand corner of the LCD. Use the or [...]

DCP Operation 3-7 3910-A2-GN32-40 September 1998 Keypad The DCP on the Model 3910 has seven keys while the optional SDCP of the COMSPHERE 3000 Series Carrier has eight keys. The additional key on the carrier is the Select key , used to connect the SDCP to a specific slot in the carrier . Key The key returns you to the T op-Level menu display from a[...]

COMSPHERE 3900 Series Modems 3-8 September 1998 3910-A2-GN32-40 Menu Structure The menu tree is a hierarchical structure used to display functions that configure and control local and remote 391x Series modems. It is accessed via the DCP and is shown in Appendix A, Menu Tre e . Configure Status PList Control T est SubHS Call_Setup Tlk/Data Security[...]

DCP Operation 3-9 3910-A2-GN32-40 September 1998 T able 3-3 (1 of 3) T op-Level Menu Status Status Message Indicates Normal Operation Leased: MR* The modem is operating on leased lines and transmitting at the displayed data rate. p Idle: MR* The modem is configured for dial network operation and is on-hook. OnLine: MR* EC** The modem is online, in [...]

COMSPHERE 3900 Series Modems 3-10 September 1998 3910-A2-GN32-40 T able 3-3 (2 of 3) T op-Level Menu Status Status Indicates Message Call Failure Busy Signal The answering modem is busy . Delayed Number [ As a result of failed call attempts, this number cannot be called at this time. Please try again later . Dial Line in Use The modem is operating [...]

DCP Operation 3-1 1 3910-A2-GN32-40 September 1998 T able 3-3 (3 of 3) T op-Level Menu Status Status Indicates Message Call Disconnect A TH Disconnect The modem has disconnected due to an A TH command. Bad Lines Disc The modem has disconnected because the lines do not support the modulation and/or data rate selected. No Carrier Disc The modem disco[...]

COMSPHERE 3900 Series Modems 3-12 September 1998 3910-A2-GN32-40 Messages listed in T able 3-4 are common operational messages that occur during modem operation. These messages normally appear on the second line of the LCD. T able 3-4 Common Operational Messages Common Operational Message Indicates Please W ait... A command to a local device takes [...]

DCP Operation 3-13 3910-A2-GN32-40 September 1998 The T op-Level menu ’ s main branches appear on the LCD in the order of Status, Configure, PList, Control, T est, SubHS, Call Setup, T alk/Data, Security , and Remote. These branches are described in detail in Chapters 4 through 13. Quick Configuration Display The Quick Configuration display indic[...]

COMSPHERE 3900 Series Modems 3-14 September 1998 3910-A2-GN32-40 The modem ’ s Quick Configuration information appears on the LCD ’ s bottom line. a Displays the network position of the modem. The letter C indicates this is a control modem, and T indicates this is a tributary modem. bbb Displays the network management address of the modem. The [...]

4-1 3910-A2-GN32-40 September 1998 Status Branch Overview The Status branch of the T op-Level menu allows you to view the current status of the leased-line or dial connection, the identity (for example, serial number and model number) of your equipment, and the DTE interface. Configure PList Control T est SubHS Call_Setup Tlk/Data Security Remote S[...]

COMSPHERE 3900 Series Modems 4-2 September 1998 3910-A2-GN32-40 T o access Status from the T op-Level menu, select Status. F1 Leased:19.2 Status Configure F2 F3 Device Health and Status (DeviceHS) DeviceHS provides a ‘‘ snapshot ” of current modem alarms which are active at the time the DeviceHS function is selected. T o access DeviceHS from [...]

Status Branch 4-3 3910-A2-GN32-40 September 1998 T able 4-1 (1 of 2) Health and Status Messages T ype Message Indicates Major Device Failure A device/self test has failed. The probable cause is a modem hardware problem or diagnostic memory failure. Facility Fault A severe data transport problem is occurring due to poor line conditions. No signal or[...]

COMSPHERE 3900 Series Modems 4-4 September 1998 3910-A2-GN32-40 T able 4-1 (2 of 2) Health and Status Messages T ype Indicates Message Dial Make Busy Mode The modem is in a Make Busy condition. Service Line (Model 391 1 only) The modem installed in a COMSPHERE 3000 Series Carrier has been switched to a service line. Short Hold T ime The modem ’ s[...]

Status Branch 4-5 3910-A2-GN32-40 September 1998 VF VF displays the condition of the leased or dial connection. T o access VF from the Status branch, make the following selection: F1 Status: > D e v i c e H S V F F2 F3 Select VF . F1 Status:VF > SigQual=Excelent F2 F3 If the modem is receiving a signal, the signal quality appears on the LCD ?[...]

COMSPHERE 3900 Series Modems 4-6 September 1998 3910-A2-GN32-40 NonLnearDist Non-Linear Distortion displays distortion which is usually associated with pulse-code modulation (PCM) compandor noise on the phone line. This value appears for T rellis Multipoint modulation. Retrains Retrains displays the number of retrains over the last 15 minutes of op[...]

Status Branch 4-7 3910-A2-GN32-40 September 1998 DTE DTE displays the state and/or activity of the following interface leads: LSD, DTR, DSR, T st, TXD, RXD, R TS, and CTS. The interface leads status is updated every 5 seconds. T o access DTE from the Status branch, make the following selections: F1 Status: Identity DTE F2 F3 Press the key until DTE[...]

COMSPHERE 3900 Series Modems 4-8 September 1998 3910-A2-GN32-40 T o access Backup from the Status branch, make the following selection: Press the key until Backup appears. F1 Status: DTE Backup F2 F3 Select Backup. F1 Status:Backup > Line=Pri 4w APL F2 F3 The configuration of the current operating line facility (either APL primary or backup) app[...]

Status Branch 4-9 3910-A2-GN32-40 September 1998 T able 4-2 Backup Status Screens Active Line 1st Screen Display Inactive Line 2nd Screen Display Possible Inactive/Backup Line Condition Line=Pri 4w APL or Line=Pri 2w APL Bckup:2wAPL=XXXX or Bckup : Dial =(blank) Good indicates that line continuity is detected. Bad indicates that line continuity is [...]

COMSPHERE 3900 Series Modems 4-10 September 1998 3910-A2-GN32-40 Options The Options Status function displays all optional firmware features currently installed in the modem. If no firmware options are installed, None_Installed appears on the LCD. T o access Options from the Status branch, make the following sections: F1 Status: DTE Options F2 F3 P[...]

Status Branch 4-1 1 3910-A2-GN32-40 September 1998 Press the key until Record appears. Select Record. F1 Record Status Display Clear F2 F3 T o display sequence faults, select Display . F1 Record Number 1 Modem O.K. F2 F3 The LCD displays the first sequence fault field. (Sequence fault fields range from 1 to 8 and are identified by a number in the u[...]

COMSPHERE 3900 Series Modems 4-12 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

5-1 3910-A2-GN32-40 September 1998 DCP Configuration Overview After installing a 391x Series modem, its software configuration options must be set using either the diagnostic control panel (DCP) or the A T command set. This chapter describes how to access and use the Configure branch of the T op-Level menu via the DCP . The Configure branch accesse[...]

COMSPHERE 3900 Series Modems 5-2 September 1998 3910-A2-GN32-40 Figures 5-1 and 5-2 graphically display the interaction between the edit area and configuration areas as viewed from the perspective of the DCP and the A T command set. CONTENTS OF Active (Saved) ARE AUTOMA TICALL Y COPIED TO Active (Operating) WHEN A SA VE IS COMMANDED VIA THE DCP , O[...]

DCP Configuration 5-3 3910-A2-GN32-40 September 1998 Active (Saved) (A TZ0, A TZ3) Customer1 (A TZ1) Customer2 (A TZ2) Factory USE AT & W COMMAND TO SA VE CHANGES TO Active (Saved), Customer1, OR Customer2 LOAD Ac tive (Operating) USING AT Z OR AT & F COMMAND S Sync Leased Answer (A T&F2) S Async Leased Answer (A T&F5) S TMp Control[...]

COMSPHERE 3900 Series Modems 5-4 September 1998 3910-A2-GN32-40 Configure Branch The Configure branch of the T op-Level menu contains all of the modem ’ s configuration options (straps) which determine how the modem operates. These configuration options are accessed by scrolling down and across various levels of the Configure branch. “ Status ?[...]

DCP Configuration 5-5 3910-A2-GN32-40 September 1998 The Configure branch consists of the following three levels: • Ld EditArea frm . Allows the selection of the Active (Operating), Active (Saved), Customer 1, Customer 2, and Factory configuration areas. • Choose Function . Allows you to make changes (Edit) to existing configuration options or [...]

COMSPHERE 3900 Series Modems 5-6 September 1998 3910-A2-GN32-40 F1 Ld Fact Preset: > Sync_Leased F2 F3 Select Sync_Leased. F1 Choose Mode: Answer Originate F2 F3 Select Answer . F1 Choose Function: Edit Save F2 F3 Select Edit. F1 Edit StrapGroup: > DTE_Interface F2 F3 F1 Edit StrapGroup T est Misc F2 F3 Scroll across the LCD and select the Mi[...]

DCP Configuration 5-7 3910-A2-GN32-40 September 1998 F1 StrapsWhenDisc > Nxt No_Change F2 F3 F1 RemAccssPasswrd: Nxt " 0 0000000 F2 F3 Select Nxt until RemAccssPasswrd appears. F1 RemAccssPasswrd: Nxt " 1 0000000 F2 F3 Select the F2 ( " ) key to increment password values. F1 RemAccssPasswrd: Nxt " 10 000000 F2 F3 Press the ke[...]

COMSPHERE 3900 Series Modems 5-8 September 1998 3910-A2-GN32-40 T o save the new password to a configuration area, make the following selections: F1 RemAccssPasswrd: Nxt " 12345678 F2 F3 Press the key to scroll up (twice). F1 Choose Function Edit Save F2 F3 Select Save. F1 Sav EditArea to > Active(Saved) F2 F3 Select a configuration area (A[...]

DCP Configuration 5-9 3910-A2-GN32-40 September 1998 Configuration T ables The modem ’ s configuration options are arranged into nine groups based on functionality: DTE Interface (T able 5-1), DTE Dialer (T able 5-2), Line Dialer (T able 5-3), Dial Line (T able 5-4), Leased Line (T able 5-5), V .42/MNP/Buffer (T able 5-6), T est (T able 5-7), Mis[...]

COMSPHERE 3900 Series Modems 5-10 September 1998 3910-A2-GN32-40 T able 5-1 (1 of 10) DTE Interface Configuration Options Async/Sync Mode: Sync Nxt Sync Async Asynchronous/Synchronous Mode. Determines whether the modem operates in Asynchronous mode or Synchronous mode. If the A T command set is enabled and this configuration option is set to Sync, [...]

DCP Configuration 5-1 1 3910-A2-GN32-40 September 1998 T able 5-1 (2 of 10) DTE Interface Configuration Options Asyn Parity Bit: None Nxt None Even Odd Mark Space This configuration option only appears if Async/Sync Mode is configured for Async. Asynchronous Parity Bit. Determines the type of asynchronous parity bit. The parity of the DTE must matc[...]

COMSPHERE 3900 Series Modems 5-12 September 1998 3910-A2-GN32-40 T able 5-1 (3 of 10) DTE Interface Configuration Options DTR Action: Ignore Nxt Ignore Stndrd_RS232 CntrlsOnHook CntrlsTxMute Data T erminal Ready Action. DTR is a signal from the DTE to the modem indicating that the DTE is connected and ready for operation. H Ignore Modem assumes DTR[...]

DCP Configuration 5-13 3910-A2-GN32-40 September 1998 T able 5-1 (4 of 10) DTE Interface Configuration Options DSR Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR On_Early Delay_T oData Data Set Ready Control. DSR is a signal from the modem to the DTE indicating the modem is connected and ready for operation. H Standard RS[...]

COMSPHERE 3900 Series Modems 5-14 September 1998 3910-A2-GN32-40 T able 5-1 (5 of 10) DTE Interface Configuration Options RTS Action: Stndrd_RS232 Nxt Stndrd_RS232 Ignore Sim_Cntl_Car Cntl_Car Request-to-Send Action. R TS is a signal from the DTE indicating the DTE has data to send. H Standard RS232 Allows the DTE to control RTS to the modem in nor[...]

DCP Configuration 5-15 3910-A2-GN32-40 September 1998 T able 5-1 (6 of 10) DTE Interface Configuration Options CTS Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Follows_RTS40 Clear-to-Send Control. CTS is a signal from the modem to the DTE indicating that it can accept data from the DTE. H Standard RS232 In Synchronous m[...]

COMSPHERE 3900 Series Modems 5-16 September 1998 3910-A2-GN32-40 T able 5-1 (7 of 10) DTE Interface Configuration Options LSD Control: Stndrd_RS232 Nxt Stndrd_RS232 Forced_On WinkWhenDisc Follows_DTR Sim_Cntl_Car =DTR/DiscOFF Line Signal Detect Control. LSD is a signal indicating that the carrier signal is being received from the remote modem. It i[...]

DCP Configuration 5-17 3910-A2-GN32-40 September 1998 T able 5-1 (8 of 10) DTE Interface Configuration Options TX Clock Source: Internal Nxt Internal External RXC_Loop This configuration option only appears if Async/Sync Mode is configured for Sync. T ransmit Clock Source. Determines the source of timing for synchronous data transmitted from the mo[...]

COMSPHERE 3900 Series Modems 5-18 September 1998 3910-A2-GN32-40 T able 5-1 (9 of 10) DTE Interface Configuration Options CT1 1 1_Rate Cntl: Disable Nxt Disable Fallback1 Fallback2 CT1 1 1 Rate Control. Allows the DTE to control modem rate via Pin 23 of the EIA-232-D interface. This configuration option determines the effect of the DTE Rate control[...]

DCP Configuration 5-19 3910-A2-GN32-40 September 1998 T able 5-1 (10 of 10) DTE Interface Configuration Options Extend Main Ch.: Disable Nxt Disable Enable Primary data can only be extended one link. Extend Main Channel. This configuration option supports extended diagnostics. Specifies whether there is main (primary) channel connectivity between t[...]

COMSPHERE 3900 Series Modems 5-20 September 1998 3910-A2-GN32-40 T able 5-2 (1 of 5) DTE Dialer Configuration Options DTE Dialer T ype: Disable Nxt Disable A T V25bis_Async V25bis_Bsync V25bis_HDLC DTR=Direct1 A T&T_Exclusv Data T erminal Equipment Dialer T ype. Identifies to the modem the type of dialing method and protocol used by the DTE. H [...]

DCP Configuration 5-21 3910-A2-GN32-40 September 1998 T able 5-2 (2 of 5) DTE Dialer Configuration Options A T Escape Char: 043 ASCI Nxt " 043 ASCI This configuration option only appears if DTE Dialer T ype is configured for A T . A T Escape Character . The escape sequence (+++) allows you to move from Data mode to Command mode. Use the A T Or[...]

COMSPHERE 3900 Series Modems 5-22 September 1998 3910-A2-GN32-40 T able 5-2 (3 of 5) DTE Dialer Configuration Options CarriageRtn Char: 013 ASCI Nxt " 013 ASCI This configuration option only appears if DTE Dialer T ype is configured for A T . Carriage Return Character . Allows you to change the ASCII character used to terminate an A T command [...]

DCP Configuration 5-23 3910-A2-GN32-40 September 1998 T able 5-2 (4 of 5) DTE Dialer Configuration Options ExtendResltCode: Enable Nxt Enable Disable Add/EC Add/V42,MNP Use_DTE_Rate This configuration option only appears if DTE Dialer T ype is configured for A T . Extended Result Codes. Informational messages such as VF data rate and Error Control [...]

COMSPHERE 3900 Series Modems 5-24 September 1998 3910-A2-GN32-40 T able 5-2 (5 of 5) DTE Dialer Configuration Options A T Cmnd Mode: Normal Nxt Normal No_ERROR NoStrapOrERR This configuration option only appears if DTE Dialer T ype is configured for A T . A T Command Mode. Determines how the modem responds to valid and invalid A T commands. H Norma[...]

DCP Configuration 5-25 3910-A2-GN32-40 September 1998 Line Dialer The Line Dialer configuration options establish parameters used by the modem to answer or originate calls. T able 5-3 shows each Line Dialer configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being insta[...]

COMSPHERE 3900 Series Modems 5-26 September 1998 3910-A2-GN32-40 T able 5-3 (2 of 5) Line Dialer Configuration Options Blind Dial Pause: 2sec Nxt 2sec 4sec 6sec 8sec 10sec 20sec This configuration option only appears when Dial T one Detect is configured for Disable. Blind Dial Pause. Determines how long the modem waits before dialing a telephone nu[...]

DCP Configuration 5-27 3910-A2-GN32-40 September 1998 T able 5-3 (3 of 5) Line Dialer Configuration Options Fast Disconnect: Disable Nxt Disable Enable Fast Disconnect. Allows the modem to disconnect immediately after receiving a disconnect command from a local DTE or its own diagnostic control panel. H Disable The modem follows its normal disconne[...]

COMSPHERE 3900 Series Modems 5-28 September 1998 3910-A2-GN32-40 T able 5-3 (4 of 5) Line Dialer Configuration Options No Carrier Disc: 2sec Nxt 2sec Disable 5sec 10sec 20sec No Carrier Disconnect. If the modem no longer receives carrier from the remote modem, it disconnects the call. This configuration option determines how long carrier is OFF bef[...]

DCP Configuration 5-29 3910-A2-GN32-40 September 1998 T able 5-3 (5 of 5) Line Dialer Configuration Options MakeBusyV ia DTR: Disable End Disable Enable Make Busy Via DTR. Determines if the modem goes of f-hook when DTR is OFF . Enable this setting if the DTE normally keeps DTR ON and turns DTR OFF when the DTE cannot accept a call. NOTE: This conf[...]

COMSPHERE 3900 Series Modems 5-30 September 1998 3910-A2-GN32-40 Dial Line The Dial Line configuration options are used to configure the modem for operation over dial lines. T able 5-4 shows each Dial Line configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default value if the modem is just being instal[...]

DCP Configuration 5-31 3910-A2-GN32-40 September 1998 T able 5-4 (2 of 3) Dial Line Configuration Options V32bis Automode: Enable Nxt Enable Disable System 85 This configuration option only appears when Dial Line Rate is configured for V .32 terbo, V .32bis, or V .32 data rate. V .32bis Automode. The modem automatically adapts to the modulation sch[...]

COMSPHERE 3900 Series Modems 5-32 September 1998 3910-A2-GN32-40 T able 5-4 (3 of 3) Dial Line Configuration Options V22b Guard T one: Disable Nxt Disable 550Hz 1800Hz This configuration option only appears when Dial Line Rate is configured for V .22bis or V .22 data rate, or when V .32bis Automode is configured for Enable. V .22bis Guard T one. De[...]

DCP Configuration 5-33 3910-A2-GN32-40 September 1998 Leased Line The Leased Line configuration options only appear when the Sync Leased factory preset template is selected. They are used to configure the modem for operation over leased lines. T able 5-5 shows each Leased Line configuration option as it appears on the LCD, with the Sync Leased fact[...]

COMSPHERE 3900 Series Modems 5-34 September 1998 3910-A2-GN32-40 T able 5-5 (2 of 6) Leased Line Configuration Options LeasedLine Rate: 19200(V32t) Nxt 19200(V32t) 16800(V32t) 14400(V32b) 12000(V32b) 9600(V32b) 7200(V32b) 4800(V32b) 19200(TMp) 14400(TMp) 9600(TMp) 7200(TMp) 4800(TMp) 2400(TMp) 2400(V22bis) 14400(V33) 12000(V33) 9600(V29) 7200(V29) [...]

DCP Configuration 5-35 3910-A2-GN32-40 September 1998 T able 5-5 (3 of 6) Leased Line Configuration Options V32bis Autorate: Enable Nxt Enable Disable This configuration option only appears when Leased Line Rate is configured for V .32 terbo or V .32bis data rate. V .32bis Autorate. Once connected, the modem automatically lowers the line rate if li[...]

COMSPHERE 3900 Series Modems 5-36 September 1998 3910-A2-GN32-40 T able 5-5 (4 of 6) Leased Line Configuration Options AutoDialStandby: Disable Nxt Disable 15min 1hr 4hr T est(2min) Adv 15min Adv 30min Adv 1 hr T estAdv2min This configuration option is not available if the LeaseLine Rate is configured for TMp and the NetworkPosition is configured f[...]

DCP Configuration 5-37 3910-A2-GN32-40 September 1998 T able 5-5 (5 of 6) Leased Line Configuration Options V27bis T rain: Short Nxt Short Long This configuration option is only available if Leased-Line Rate is configured for V27bis. V .27bis T rain. Controls the train time for V .27bis operation. The A T command is S-Register S70= n , where n is 0[...]

COMSPHERE 3900 Series Modems 5-38 September 1998 3910-A2-GN32-40 T able 5-5 (6 of 6) Leased Line Configuration Options Lease_Lookback: Disable Nxt Disable Enable Lease Lookback. While operating on backup lines, this configuration option allows the modem to test the primary 4-wire leased lines for connectivity by detecting line energy across the nor[...]

DCP Configuration 5-39 3910-A2-GN32-40 September 1998 T able 5-6 (1 of 7) V .42/MNP/Buffer Configuration Options Err Contrl Mode: V42/MNPorBfr Nxt V42/MNPorBfr V42/MNPorDsc MNP_or_Buffr MNP_or_Disc Buf ferMode DirectMode LAPM_or_Disc LAPM_or_Bufr This configuration option is only available if Async/Sync Mode is configured for Async. Error Control M[...]

COMSPHERE 3900 Series Modems 5-40 September 1998 3910-A2-GN32-40 T able 5-6 (2 of 7) V .42/MNP/Buffer Configuration Options Err Contrl Mode (Continued) Nxt V42/MNPorBfr V42/MNPorDsc MNP_or_Buffr MNP_or_Disc Buf ferMode DirectMode LAPM_or_Disc LAPM_or_Bufr The A T command for Buffer Mode is N0. The A T command for Direct Mode is N1. The A T comman[...]

DCP Configuration 5-41 3910-A2-GN32-40 September 1998 T able 5-6 (3 of 7) V .42/MNP/Buffer Configuration Options EC Negotiat Bfr: Disable Nxt Disable Enable Disab&Switch This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is configured for V42/MNPorBfr , MNP_or_Buffr , or LAPM_or_Bufr .[...]

COMSPHERE 3900 Series Modems 5-42 September 1998 3910-A2-GN32-40 T able 5-6 (4 of 7) V .42/MNP/Buffer Configuration Options Flw Cntl of DTE: CTS_to_DTE Nxt CTS_to_DTE Disable XON/XOFF This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Flow Control of DTE. [...]

DCP Configuration 5-43 3910-A2-GN32-40 September 1998 T able 5-6 (5 of 7) V .42/MNP/Buffer Configuration Options XON/XOFF Psthru: Disable Nxt Disable Enable This configuration option is only available if Async/Sync Mode is configured for Async, and Flow Control of Modem is configured for XON/XOFF . XON/XOFF Passthrough. Considers an XON/XOFF charac[...]

COMSPHERE 3900 Series Modems 5-44 September 1998 3910-A2-GN32-40 T able 5-6 (6 of 7) V .42/MNP/Buffer Configuration Options Break Buffr Ctl: Keep_Data Nxt Keep_Data Discard_Data This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Break Buffer Control. Deter[...]

DCP Configuration 5-45 3910-A2-GN32-40 September 1998 T able 5-6 (7 of 7) V .42/MNP/Buffer Configuration Options BuffrDiscDelay: 10sec Nxt 10sec Disable 60sec This configuration option is only available if Async/Sync Mode is configured for Async, and Error Control Mode is not configured for DirectMode. Buffer Disconnect Delay . Determines how long [...]

COMSPHERE 3900 Series Modems 5-46 September 1998 3910-A2-GN32-40 T est The T est configuration options determine specifics, such as the duration of a test, for the various diagnostic tests available to the modem. T able 5-7 shows each T est configuration option as it appears on the LCD, with the Sync Leased factory default setting (the default valu[...]

DCP Configuration 5-47 3910-A2-GN32-40 September 1998 T able 5-7 (2 of 2) T est Configuration Options T est T imeout: Disable Nxt Disable 30sec 60sec 240sec T est T imeout. Determines how long a test runs before aborting. H Disable Allows a test to run indefinitely . H 30, 60, or 240 seconds Allows the test to run for 30 seconds, 60 seconds, or 240[...]

COMSPHERE 3900 Series Modems 5-48 September 1998 3910-A2-GN32-40 Misc The Miscellaneous configuration options determine specifics for various functions, including network management parameters and remote modem access. T able 5-8 shows each Misc (Miscellaneous) configuration option as it appears on the LCD, with the Sync Leased factory default setti[...]

DCP Configuration 5-49 3910-A2-GN32-40 September 1998 T able 5-8 (2 of 4) Miscellaneous Configuration Options Speaker V olume: Medium Nxt Medium Low High Speaker V olume. Controls the level of speaker volume. NOTE: Speaker V olume can also be temporarily set using the Control branch; however , a reset or power cycle will restore the modem to the Sp[...]

COMSPHERE 3900 Series Modems 5-50 September 1998 3910-A2-GN32-40 T able 5-8 (3 of 4) Miscellaneous Configuration Options NMS_Call_Msgs: CallCnct&Prg Nxt CallCnct&Prg Disable CallCnctOnly CallProgOnly NMS Call Messages. Determines if the modem status and/or call summary information is sent to the NMS. The modem can itemize status, such as Ca[...]

DCP Configuration 5-51 3910-A2-GN32-40 September 1998 T able 5-8 (4 of 4) Miscellaneous Configuration Options Diag Connection: Modem(DC) Nxt Modem(DC) NMS(CC) Disable This configuration option is not available if the LeaseLine Rate is configured for TMp and the NetworkPosition is configured for T ributary . Diagnostic Connection. Allows the configu[...]

COMSPHERE 3900 Series Modems 5-52 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

6-1 3910-A2-GN32-40 September 1998 Poll List Branch Overview The Poll List function is not available on Point-to-Point control modems or Multipoint T ributary modems. The Poll List (Plist) branch of the T op-Level menu allows you to identify downstream modems in order to support health and status polling and download broadcasting. The maximum numbe[...]

COMSPHERE 3900 Series Modems 6-2 September 1998 3910-A2-GN32-40 T o access PList from the T op-Level menu, make the following selections: F1 Leased:19.2 PList Control F2 F3 Press the key until PList appears. Select PList. W ithin a network link, a control modem can communicate with a tributary modem by using the tributary modem ’ s network manage[...]

Poll List Branch 6-3 3910-A2-GN32-40 September 1998 If there are modems in the poll list when you select Display , xxx Displays the network management address of the modem in the poll list. yyyyyy Displays either Active or Skip to indicate the poll list in which the network management address is included. Select Nxt to scroll through the entries in[...]

COMSPHERE 3900 Series Modems 6-4 September 1998 3910-A2-GN32-40 Press the key until Change appears. Select Change. Change allows you to add modems to the Active poll list (Active), delete modems from both Active and Skip poll lists (Delete), and move modems from the Active to the Skip poll list. F1 Poll List:Chang > Active Delete F2 F3 T o imple[...]

Poll List Branch 6-5 3910-A2-GN32-40 September 1998 Add The Add function does not appear in Remote mode or on control modems. Add allows you to add the tributary modem to a control modem ’ s poll list. This function should be initiated from only one tributary modem at a time. T o access Add from the Plist branch, make the following selections: F1[...]

COMSPHERE 3900 Series Modems 6-6 September 1998 3910-A2-GN32-40 Press the key until Acquire appears. Select Acquire. NOTE If an error message ( OtherT estActive or Unable T o Acquir ) appears on the second line of the LCD, move up one level in the menu tree to clear the message and return to the PList Acquire branch. The OtherT estActive message in[...]

7-1 3910-A2-GN32-40 September 1998 Control Branch Overview The Control branch of the T op-Level menu allows you to manage hardware and software functions, such as speaker volume, reset, busy out, and firmware download. Control “ Status ” Status Configure PList T est SubHS Call_Setup Tlk/Data Security Remote Speaker Reset Data_Stream Make_Busy o[...]

COMSPHERE 3900 Series Modems 7-2 September 1998 3910-A2-GN32-40 T o access Control from the T op-Level menu, make the following selections: F1 Leased:19.2 Control T est F2 F3 Press the key until Control appears. Select Control. Speaker Speaker allows you to make temporary adjustments to the modem ’ s speaker volume. Upon a reset, speaker volume r[...]

Control Branch 7-3 3910-A2-GN32-40 September 1998 Reset Reset causes the modem to stop operation and perform a complete program restart. The modem begins the power-up test sequence that ends with the T op-Level menu displayed on the LCD. Configuration options stored in an Active (Saved) configuration area are copied to the Active (Operating) config[...]

COMSPHERE 3900 Series Modems 7-4 September 1998 3910-A2-GN32-40 If you want to disable the modem ’ s data stream, press the F2 key . When the message Command Complete appears, press the key to clear the message. F1 Data Stream Port1 Enable F2 F3 Press the F2 key again to enable the modem ’ s data stream. T o exit this function and remain in the[...]

Control Branch 7-5 3910-A2-GN32-40 September 1998 After selecting the desired interface, the message Command Complete appears on the bottom line of the LCD and the selected interface appears in the xxxxx field. T o exit this function and remain in the Control branch, press the key . T o exit and return to the T op-Level menu, press the key . NOTE T[...]

COMSPHERE 3900 Series Modems 7-6 September 1998 3910-A2-GN32-40 T o remove the modem from Make Busy mode, press the key once and the key until RemoveMakeBusy appears. F1 Control: RemoveMakeBusy F2 F3 Press any function key to select RemoveMakeBusy . The message Command Complete appears on the LCD. Service Line/Disconnect Service Line The Service Li[...]

Control Branch 7-7 3910-A2-GN32-40 September 1998 Download Software The Download Software function sets parameters within the modem when transferring firmware to one or more modems or when receiving firmware upgrades from a locally attached PC-based controller . The latter is only performed by customer service personnel. There are two selections un[...]

COMSPHERE 3900 Series Modems 7-8 September 1998 3910-A2-GN32-40 Clone Remote in Point-to-Point Configurations Before using Clone Remote in point-to-point configurations, perform the following: • Make sure the 391x Series modems have an established leased-line connection using either V .33, V .32 terbo , V .32bis, V .32, or V .29 modulation (refer[...]

Control Branch 7-9 3910-A2-GN32-40 September 1998 From the Choose DLL T ype screen, press the key until DC_Broadcast appears. Press F1 or F2 to transfer an exact copy of the tributary modem ’ s firmware to the DC-connected control modem(s) using the Active Poll list. Proceed to Implementing a Clone Remote Operation on page 7-12, which follows the[...]

COMSPHERE 3900 Series Modems 7-10 September 1998 3910-A2-GN32-40 • For Single download configurations, know the remote access password and the network management address of the remote tributary modem that will receive the download. Refer to the Misc section in Chapter 4 for a description of the remote access password (RemAccssPasswrd) configurati[...]

Control Branch 7-1 1 3910-A2-GN32-40 September 1998 After completing these actions, proceed to Implementing a Clone Remote Operation on page 7-12. Cloning a Multiple TMp Remote F1 Choose DLL T ype > Single Multiple F2 F3 Press the F3 key to select Multiple Clone Remote. After completing this action, proceed to Implementing a Clone Remote Operati[...]

COMSPHERE 3900 Series Modems 7-12 September 1998 3910-A2-GN32-40 Implementing a Clone Remote Operation W ARNING The modem begins a transfer of its own program to the remote modem. This process takes the communication link out-of-service for several minutes depending on the data rate of the link. If the Clone Remote process is started and then inter[...]

Control Branch 7-13 3910-A2-GN32-40 September 1998 Access Disabled The remote modem ’ s Access from Remote configuration is disabled. Password Invalid The local and remote modems ’ passwords do not match. Correct the problem and attempt another download from the local modem. If this fails, contact your service representative. No Circuit There i[...]

COMSPHERE 3900 Series Modems 7-14 September 1998 3910-A2-GN32-40 Press the key until VF_Thresh_Update appears. Press any function key to select VF_Thresh_Update. F1 VF Thresholds Edit Save Reset F2 F3 Select Edit. In the following example, the RSL High threshold is changed from 09 ( – dBm) to 10. This example demonstrates VF threshold editing and[...]

Control Branch 7-15 3910-A2-GN32-40 September 1998 Press the key to move the cursor to the next position ( 9 ). Select the F2 ( " ) key to change the number above the cursor ( 9 ) to 0. F1 RSL High (- dBm) N x t " 10 F2 F3 NOTE If you want to modify additional VF thresholds, select Nxt. T o save the edited threshold(s): F1 RSL High (- dBm[...]

COMSPHERE 3900 Series Modems 7-16 September 1998 3910-A2-GN32-40 T o correct the invalid VF threshold, press the key to return to the VF Threshold Edit/Save/Reset screen. F1 VF Thresholds Edit Save Reset F2 F3 Select Reset to restore the original default values into memory . Repeat the Edit and Save procedure until the VF threshold(s) is valid and [...]

8-1 3910-A2-GN32-40 September 1998 T est Branch Overview The T est branch of the T op-Level menu allows you to initiate various modem tests. Use these tests if you are having data communication problems, such as periodic character loss, random errors, or constant format errors. By the process of elimination, you can usually isolate the fault in you[...]

COMSPHERE 3900 Series Modems 8-2 September 1998 3910-A2-GN32-40 T o access the T est branch from the T op-Level menu, make the following selections: F1 Leased:19.2 Control T est F2 F3 Press the key until T est appears. Select T est. Abort Abort ends any test that is in progress and brings the modem back to the normal mode of operation. Confirmation[...]

T est Branch 8-3 3910-A2-GN32-40 September 1998 Self Self performs an internal self-test of the modem, which takes less than a minute to complete. The modem must be offline; otherwise, Invalid Command appears. W ARNING When this test is run in Remote mode, it will cause the Remote mode session to be lost. The Remote mode session can be reestablishe[...]

COMSPHERE 3900 Series Modems 8-4 September 1998 3910-A2-GN32-40 Loc Analog Loop Loc Analog Loop performs a local analog loopback (ITU-T - V .54 Loop 3), Figure 8-1, that verifies modem operation as well as the connection between the DTE and modem. The modem must be offline and in Synchronous or Asynchronous Direct mode to perform this test, otherwi[...]

T est Branch 8-5 3910-A2-GN32-40 September 1998 The message Started appears on the LCD, and the T est LED lights for the duration of the test. If Invalid Command appears on the LCD, another test is in progress. Select Abort to clear the current test and try again. If the T est Timeout configuration option is enabled, T est Timeout appears at the co[...]

COMSPHERE 3900 Series Modems 8-6 September 1998 3910-A2-GN32-40 Press the key until Rem_Digital_Loop appears. Press any function key to start this test. F1 T est:Remote Loop Started F2 F3 The message Started appears on the LCD, and the T est LED lights for the duration of the test. If Invalid Command appears on the LCD, another test is in progress.[...]

T est Branch 8-7 3910-A2-GN32-40 September 1998 F1 Te s t : Loc_Digital_Loop F2 F3 Press the key until Loc_Digital_Loop appears. Press any function key to start this test. F1 T est:Digitl Loop Started F2 F3 The message Started appears on the LCD and the T est LED lights. If Invalid Command appears on the LCD, another test is in progress. Select Abo[...]

COMSPHERE 3900 Series Modems 8-8 September 1998 3910-A2-GN32-40 Figure 8-5. Pattern T est and Digital Loopback T est Figure 8-6. End-to-End Pattern T est T o access Pattern from the T est branch, make the following selections: F1 Te s t : < Pattern F2 F3 Press the key until Pattern appears. Select Pattern to start this test. F1 T est:Pattern >[...]

T est Branch 8-9 3910-A2-GN32-40 September 1998 BlksErrd=xxxxxxx displays the number of blocks of data found in error (block size is 1000 bits per block). BlksRcvd=xxxxxxx displays the total number of blocks of data received. The message NoSync appears as a value for BlksErrd while the modem ’ s receiver is synchronizing. The message OvrFlw appea[...]

COMSPHERE 3900 Series Modems 8-10 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

9-1 3910-A2-GN32-40 September 1998 Sub-Network Health and Status Branch Overview The Sub-Network Health and Status (SubHS) function is not available on multipoint tributary modems or with certain modulations (V .29, V .33, V .22bis, and V .27bis). The SubHS branch of the T op-Level menu allows you to display alarm conditions in downstream modems. ?[...]

COMSPHERE 3900 Series Modems 9-2 September 1998 3910-A2-GN32-40 Press the key until SubHS appears. Select SubHS. NOTE If there are no modems in the multipoint poll list, the message Poll List Empty! appears on the second line of the LCD. F1 Sub-network HS Nxt xxx yyyyyy F2 F3 When you select SubHS, xxx Displays the network management address of the[...]

10-1 3910-A2-GN32-40 September 1998 Call Setup Branch Overview The Call Setup function is not available in TMp Control mode. For dial backup applications, the Call Setup branch of the T op-Level menu allows you to dial, disconnect, and answer telephone calls. For leased backup applications, the Call Setup branch allows you to switch between the pri[...]

COMSPHERE 3900 Series Modems 10-2 September 1998 3910-A2-GN32-40 T o access the Call Setup branch from the T op-Level menu, make the following selections: F1 Leased:19.2 Call_Setup F2 F3 Press the key until Call_Setup appears. Select Call_Setup. Dial For dial backup applications, Dial allows you to dial any telephone number stored in directory loca[...]

Call Setup Branch 10-3 3910-A2-GN32-40 September 1998 Once the directory location you want appears on the LCD, press the F2 or F3 key to dial the number . F1 DialDirectory:01 Off Hook F2 F3 The Call Setup status Off Hook appears during the connection process. If the connection is successful, one of the Normal Operation status messages (T able 3-3 i[...]

COMSPHERE 3900 Series Modems 10-4 September 1998 3910-A2-GN32-40 Answer For dial backup applications, Answer allows the modem to go off-hook, generate an answer tone, and begin the handshaking process with the calling modem. Use the Answer function when the Auto-Answer Ring Count configuration option is disabled. (Refer to Line Dialer in Chapter 5,[...]

Call Setup Branch 10-5 3910-A2-GN32-40 September 1998 Dial Standby/Return to Dial When the modem is operating in Dial Backup mode (DialBckUp), Dial Standby and Return to Dial allow the modem to switch back and forth between primary leased-line and primary leased-line backup operation while still maintaining the backup connection (Figure 10-1). Swit[...]

COMSPHERE 3900 Series Modems 10-6 September 1998 3910-A2-GN32-40 T o access Dial Standby or Return to Dial from the Call Setup branch, make the following selections: F1 Call Setup: Dial Standby F2 F3 Press the key until Dial Standby or Return_to_Dial appears. Select the appropriate function. F1 Dial Standby Command Complete F2 F3 If the modem is op[...]

Call Setup Branch 10-7 3910-A2-GN32-40 September 1998 Press the key until Change_Directory appears. Press any function key to select Change_Directory . F1 01:5 51234 z N x t " # F2 F3 The phone number listed in directory location 1 appears. Select Nxt to display other directory locations. Entering T elephone Numbers and Dial Command Modifiers [...]

COMSPHERE 3900 Series Modems 10-8 September 1998 3910-A2-GN32-40 T o save the number just entered, scroll to the next directory location by selecting Nxt. The number is now stored in nonvolatile memory . T able 10-1 describes what can be entered in directory locations. T able 10-1 V alid Dial Command Modifiers Dial command modifiers are parameters [...]

Call Setup Branch 10-9 3910-A2-GN32-40 September 1998 Directory Status (Does Not Appear in North America) Directory Status displays the status of each directory location. T o access Directory Status from the Call Setup branch, make the following selections: F1 Call Setup: < Directory_Status F2 F3 Press the key until Directory_Status appears. Pre[...]

COMSPHERE 3900 Series Modems 10-10 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

1 1-1 3910-A2-GN32-40 September 1998 T alk/Data Branch Overview The T alk/Data function is not available in TMp Contr ol mode. The T alk/Data branch of the T op-Level menu allows you to switch the modem between T alk mode and Data mode when manually dialing using either the DCP or an externally attached telephone. T o add an external telephone to y[...]

COMSPHERE 3900 Series Modems 1 1-2 September 1998 3910-A2-GN32-40 Manual Dialing When the Remote Modem is Configured for Auto-Answer NOTE On the remote modem, the Line Current Disconnect configuration option (refer to Line Dialer in Chapter 5, DCP Configuration ) must be set to Disable. This configuration option does not appear on Models 3910-A1-40[...]

T alk/Data Branch 1 1-3 3910-A2-GN32-40 September 1998 Manual Dialing When the Remote Modem is Configured for Manual Answer NOTE On both modems, the Line Current Disconnect configuration option (refer to Line Dialer in Chapter 5, DCP Configuration ) must be set to Disable . This configuration option does not appear on Models 3910-A1-401 and 391 1-B[...]

COMSPHERE 3900 Series Modems 1 1-4 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

12-1 3910-A2-GN32-40 September 1998 Dial Access Security Overview NOTE This chapter supports the operation of dial access security for the COMSPHERE 391x Series modems. This chapter is self supporting and can be removed to prevent unwanted knowledge of dial access security operation. Although the security functions described in this chapter are des[...]

COMSPHERE 3900 Series Modems 12-2 September 1998 3910-A2-GN32-40 Originate Access Security Originate Access lets you control who can originate a call from a local modem via the A T command set. This is useful in LAN and modem pooling applications. W ith Originate Access security , a local user ’ s password is embedded in the A T dial command. If [...]

Dial Access Security 12-3 3910-A2-GN32-40 September 1998 The following examples illustrate two ways to enter a VF-side password: A TDP5551234TW12345678# or A TDT5551234@12345678# Where: AT D is the A T dial command. P and T are the Pulse dial and T one (DTMF) dial modifiers. 5551234 is the phone number . W or @ is the VF Prompt T one option setting[...]

COMSPHERE 3900 Series Modems 12-4 September 1998 3910-A2-GN32-40 Combination of VF-Side and DTE-Side Passwords The previously described methods of password entry can be combined to provide two layers of security . In this case, the modems negotiate VF-side password entry prior to training. If successful, the modems connect and then prompt the origi[...]

Dial Access Security 12-5 3910-A2-GN32-40 September 1998 Set Access Ctrl Set Access Control allows you to configure critical parameters contained within the security database table that control dial access security . These parameters are protected by an Administrative Password, which is an 8-digit decimal number . Set Access Control contains the Ed[...]

COMSPHERE 3900 Series Modems 12-6 September 1998 3910-A2-GN32-40 Press the key to scroll the Set Answer Security , Set Originate Security , and Set Administrative Password groups into view . If an incorrect administrative password is entered, then the message PassW rd Invalid appears as well as the last password entered. Enter the correct password [...]

Dial Access Security 12-7 3910-A2-GN32-40 September 1998 Select Index appears. Press the F2 ( " ) key to increment index values. Press the key to move the cursor to the next position. Continue this sequence until the desired index appears, and then select Ent. If an index outside of the range is entered, the message Index T oo Big appears. Cho[...]

COMSPHERE 3900 Series Modems 12-8 September 1998 3910-A2-GN32-40 T able 12-1 (2 of 2) Edit Password T able Group Options H VF plus DTE Indicates that both layers of password entry are used with this index ’ s password. This location is configured so that the answering modem sends a prompt for the DTE-side password after receiving a valid VF-side [...]

Dial Access Security 12-9 3910-A2-GN32-40 September 1998 Set Answer Sec Set Answer Security determines if dial access security is enabled or disabled. This method of inbound security is configured in the answering modem. Although this also appears under the Security Configuration Option group, it can only be changed from the Set Answer Sec LCD disp[...]

COMSPHERE 3900 Series Modems 12-10 September 1998 3910-A2-GN32-40 Set Orig Sec Set Originate Security controls whether or not the modem can originate a call using A T commands when the dial access security feature is installed. This method of outbound security only applies to modems originating a call. T o access Set Orig Sec from Set Access Ctrl, [...]

Dial Access Security 12-1 1 3910-A2-GN32-40 September 1998 Set Admin PsWd Set Administrative Password is used to change the Administrative Password value. The Administrative Password is an 8-digit decimal number that allows authorized users to enter the Access Security Control function. NOTE If this value is forgotten, then the only way to access a[...]

COMSPHERE 3900 Series Modems 12-12 September 1998 3910-A2-GN32-40 Reset Security Reset Security is the second major function within the Security branch of the T op-Level menu. It erases all contents of the security database table and resets all index locations to Cleared. T wo selections appear under Reset Security: Abort Security Reset and Erase A[...]

Dial Access Security 12-13 3910-A2-GN32-40 September 1998 Security Configuration Options The Security Configuration Options group allows you to view and set dial access security parameters. This group is located in the Configuration branch of the T op-Level menu. T able 12-4 shows each Security configuration option as it appears on the LCD. The fac[...]

COMSPHERE 3900 Series Modems 12-14 September 1998 3910-A2-GN32-40 T able 12-4 (2 of 3) Security Configuration Options DTE Password T ermination Character . Allows you to change the ASCII character used to indicate the end of a password or User ID entered by an originating user . This character can be set to any ASCII value from 0 to 127. DTE_PW_BkS[...]

Dial Access Security 12-15 3910-A2-GN32-40 September 1998 T able 12-4 (3 of 3) Security Configuration Options H VF & DTE The answering modem is enabled for security . The modems negotiate security using the VF-side password entry technique protocol. If successful, and the Password T ype for this particular VF password is set for VF_&_DTE, a[...]

COMSPHERE 3900 Series Modems 12-16 September 1998 3910-A2-GN32-40 Security Password Entry T echniques The previous sections described how to set up and configure your network for dial access security . Once configured and enabled, you must now supply a password to originate or answer a call. The following examples demonstrate how to enter an Answer[...]

Dial Access Security 12-17 3910-A2-GN32-40 September 1998 Originate Access Password An Originate Access password is entered by a local user to gain access to a local 391x Series modem. This password is embedded in the A T dial command and cannot be entered from the diagnostic control panel (DCP). The following example describes how to enter an Orig[...]

COMSPHERE 3900 Series Modems 12-18 September 1998 3910-A2-GN32-40 Database T able Examples The following examples illustrate possible database tables in which the password type is configured for VF Entry , DTE Entry or a combination of VF , DTE, and VF plus DTE Entry . These tables are shown for illustrative purposes only . Passwords shown are not [...]

Dial Access Security 12-19 3910-A2-GN32-40 September 1998 T able 12-7 is an example of a security database table that uses a mixture of VF and DTE passwords. T able 12-7 Security Database T able Using Both VF-Side and DTE-Side Passwords VF and DTE Passwords Index Password T ype Assigned to 121 1 VF_Entry Denver office* 131 12 VF_plus_DTE Chicago of[...]

COMSPHERE 3900 Series Modems 12-20 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

Dial Access Security 12-21 3910-A2-GN32-40 September 1998 NOTE This page is self-supporting and can be removed for security reasons. 00282600 Dial Access Security T o clear the dial access security alarm light from the modem ’ s front panel, do the following: 3. Press the key to return to the T op-Level menu. 4. Press F1 to access the Status bran[...]

COMSPHERE 3900 Series Modems 12-22 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

13-1 3910-A2-GN32-40 September 1998 Remote Branch Overview The Remote branch of the T op-Level menu allows you to control the remote modem ’ s DCP using the local modem ’ s DCP . This function allows you to change configuration options and control test functions in a remote modem. Any changes made to configuration options while using the Remote[...]

COMSPHERE 3900 Series Modems 13-2 September 1998 3910-A2-GN32-40 The following conditions must be met before using the Remote branch: • A connection using either leased lines or the dial network must be established. • The Access from the Remote configuration option must be enabled in the remote modem. • In point-to-point networks, the Remote [...]

Remote Branch 13-3 3910-A2-GN32-40 September 1998 For T rellis Multipoint (TMp) control modems, you must specify the network management address of a tributary modem. The following display does not appear in point-to-point or T rellis Multipoint tributary modems. F1 Choose Address: E n t " x xx F2 F3 The address field (xxx) displays the network[...]

COMSPHERE 3900 Series Modems 13-4 September 1998 3910-A2-GN32-40 If operation over the secondary channel is desired, press any function key to select the secondary channel. Secondary channel only appears if using V .32 terbo , V .32bis, V .32 or TMp modulation. If operation over the primary channel is desired, press the key until primary displays a[...]

Remote Branch 13-5 3910-A2-GN32-40 September 1998 • If a connection is established but the wrong password is stored, the status message Password Invalid appears on the LCD. This configuration option must be enabled by the remote user . (Refer to the Remote Access Password configuration option in T able 5-8 of Chapter 5, DCP Configuration .) • T[...]

COMSPHERE 3900 Series Modems 13-6 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

14-1 3910-A2-GN32-40 September 1998 A T Command Set and S-Registers Overview The A T command set provides an alternative method to the modem ’ s DCP for entering commands that control the operation and configuration of the 391x Series modems. This chapter discusses guidelines necessary to operate A T commands as well as listing the modifiers for [...]

COMSPHERE 3900 Series Modems 14-2 September 1998 3910-A2-GN32-40 Use the O command to return to Data mode from online Command mode. Enter the following command: TYPE: AT O PRESS: Enter Command Guidelines Review the following guidelines before using any A T Commands. • The escape sequence ( + + + ) is used to enter online Command mode from Data mo[...]

A T Command Set and S-Registers 14-3 3910-A2-GN32-40 September 1998 Result Codes T able 14-1 lists all valid result codes for the 391x Series modem. T able 14-1 (1 of 2) Result Codes Numbers (1) Numbers (2) Word Description 0 0 OK Command executed 1 1 CONNECT Modem connected to line 2 2 RING Modem receiving a ring voltage from the VF line 3 3 NO CA[...]

COMSPHERE 3900 Series Modems 14-4 September 1998 3910-A2-GN32-40 T able 14-1 (2 of 2) Result Codes Numbers (1) Description Word Numbers (2) 28 28 CONNECT 38400** Connection at 38,400 bps 29 14 CONNECT 19200/ EC** Connection at 19,200 bps with error control 30 30 CONNECT 57600** Connection at 57,600 bps 77 77 FORBIDDEN Forbidden number 78 78 DELA YE[...]

A T Command Set and S-Registers 14-5 3910-A2-GN32-40 September 1998 T able 14-2 (1 of 10) 391x Series A T Commands AT Command Description DCP LCD Command Sequence A/ Repeat Last Command. Reexecutes last command string. (Not to be preceded with A T or followed by pressing the Return key .) Call Setup Answer A Answer Mode. Goes off-hook and attempts[...]

COMSPHERE 3900 Series Modems 14-6 September 1998 3910-A2-GN32-40 T able 14-2 (2 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description D n (cont.) @ — Quiet answer . W ait for five seconds of silence after dialing the number . If the silence is not detected, the modem sends either a NO ANSWER result to the DTE. ! — Hook[...]

A T Command Set and S-Registers 14-7 3910-A2-GN32-40 September 1998 T able 14-2 (3 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description O Return to Online or Data Mode. Returns modem to Data mode from Online Command mode. None P Pulse Dial. Sets the modem for Pulse Dial mode. ConfigureEdit Line Dialer NOTE: Pulse Mode i[...]

COMSPHERE 3900 Series Modems 14-8 September 1998 3910-A2-GN32-40 T able 14-2 (4 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description X n Extended Result Code, Dial T one Detect, and Busy T one Detect Configuration Options. Extended Dial T one Busy T one Result Code: Detect: Detect: X0 Disable Disable Disable X1 Enable Dis[...]

A T Command Set and S-Registers 14-9 3910-A2-GN32-40 September 1998 T able 14-2 (5 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description Z n Reset and Load Active. Z0 Loads configuration options from Active (Saved) to Active (Operating). Z1 Loads configuration options from Customer 1 to Active (Operating). Z2 Loads configu[...]

COMSPHERE 3900 Series Modems 14-10 September 1998 3910-A2-GN32-40 T able 14-2 (6 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description &F n Select Factory Default Configuration Options. Loads factory configuration options into Active (Operating) area. &F0 Async Dial &F1 Sync Dial &F2 Sync Leased: Answer &am[...]

A T Command Set and S-Registers 14-1 1 3910-A2-GN32-40 September 1998 T able 14-2 (7 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description &M n and &Q n Async/Sync Mode and DTE Dialer T ype. &M0, &Q0 Modem operates in Asynchronous mode and uses A T Command protocol. &M1, &Q1 Modem operates in Synchr[...]

COMSPHERE 3900 Series Modems 14-12 September 1998 3910-A2-GN32-40 T able 14-2 (8 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description &V n V iew Configuration Options. Displays each configuration group within the Active (Operating), Active (Saved), Customer 1, and Customer 2 configuration areas as well as the telephon[...]

A T Command Set and S-Registers 14-13 3910-A2-GN32-40 September 1998 T able 14-2 (9 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description D n CTS Control. D0 Forced On. Forces CTS to always ON. D1 Standard RS232. D2 Wink When Disconnect. CTS is turned OFF for 1 to 2 seconds upon a disconnect. D3 Follows DTR. The state[...]

COMSPHERE 3900 Series Modems 14-14 September 1998 3910-A2-GN32-40 T able 14-2 (10 of 10) 391x Series A T Commands AT Command DCP LCD Command Sequence Description T n No Data Disconnect T imer . T0 Disable. Tn Where n is a value from 1 to 255 in 1-minute increments. ConfigureEdit Line Dialer NOTE: The factory default value is country dependent.[...]

A T Command Set and S-Registers 14-15 3910-A2-GN32-40 September 1998 S-Register Format S-Registers can be displayed and/or modified when the modem is in Command mode. T o display the value of an S-Register , issue the following command: TYPE: AT S n ? Where: n is the register number . PRESS: Enter T o modify the value of an S-Register, issue the fo[...]

COMSPHERE 3900 Series Modems 14-16 September 1998 3910-A2-GN32-40 T able 14-3 (2 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S5 Backspace Character . Register determines ASCII value used as the backspace (Backspace key). This character moves the cursor to the left and erases the previous character . Enter a value [...]

A T Command Set and S-Registers 14-17 3910-A2-GN32-40 September 1998 T able 14-3 (3 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S40 Auto Make Busy . Register determines if the modem goes off-hook under certain conditions. This register should only be enabled when the modem is located behind a user ’ s Private Br[...]

COMSPHERE 3900 Series Modems 14-18 September 1998 3910-A2-GN32-40 T able 14-3 (4 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S44 Leased-Line Rate. Register determines the modem ’ s data rate and modulation scheme for operation on either 2-wire or 4-wire leased lines in either Answer or Originate mode. Register h[...]

A T Command Set and S-Registers 14-19 3910-A2-GN32-40 September 1998 T able 14-3 (5 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S47 Auto Dial Standby . Register determines if the modem performs an automatic dial standby if in Dial Backup mode. Register has the following values: 0 = Disable 1 = 15 minutes 2 = 1 hou[...]

COMSPHERE 3900 Series Modems 14-20 September 1998 3910-A2-GN32-40 T able 14-3 (6 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S53 V .54 Address. Identifies the address of the modem to be placed in a loopback test. Register has the following values: 0 = Disable 1 – 34 = Modem address The factory setting is Disable[...]

A T Command Set and S-Registers 14-21 3910-A2-GN32-40 September 1998 T able 14-3 (7 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S61 CT1 1 1 Rate Control. Register determines if CT1 1 1 Rate is disabled, set for Fallback 1 or Fallback 2. CT1 1 1 Rate allows the DTE to control modem rate via Pin 23 of the EIA-232-D [...]

COMSPHERE 3900 Series Modems 14-22 September 1998 3910-A2-GN32-40 T able 14-3 (8 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S66 NMS Call Messages. Register determines if the modem sends information regarding status (Call Progress) and/or sends summarized call statistics (Call Connect) to the 6700 Series Network M[...]

A T Command Set and S-Registers 14-23 3910-A2-GN32-40 September 1998 T able 14-3 (9 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S72 RTS Antistreaming. Register determines the antistreaming operation of the modem. Register has the following values: 0 = Disable 1 = 10 sec 2 = 30 sec 3 = 1 min 4 = 2 min 5 = 3 min 6 =[...]

COMSPHERE 3900 Series Modems 14-24 September 1998 3910-A2-GN32-40 T able 14-3 (10 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S82 V .32bis Autorate (Leased Line). Register determines if Autorating is used on leased lines when connected in V .32bis mode. Register has the following values: 0 = Enable 1 = Disable The[...]

A T Command Set and S-Registers 14-25 3910-A2-GN32-40 September 1998 T able 14-3 (1 1 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S89 V .42 Automatic Request for Retransmission (ARQ) Window Size Increase. Register allows the ARQ window size to be set to a value from six frames to fifteen frames. For best performan[...]

COMSPHERE 3900 Series Modems 14-26 September 1998 3910-A2-GN32-40 T able 14-3 (12 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S93 V .29 Retrain. When enabled, the modem transmits a training sequence whenever it receives one. This configuration option should normally be disabled for control modems. Register has the[...]

A T Command Set and S-Registers 14-27 3910-A2-GN32-40 September 1998 T able 14-3 (13 of 13) 391x Series S-Registers S-Register DCP LCD Command Sequence Description S97 Reduced Asynchronous Buf fer Size. Register limits the modem ’ s buffer size to a maximum of 20 characters. Register has the following values: 0 = Disable 1 = Enable The factory se[...]

COMSPHERE 3900 Series Modems 14-28 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

A-1 3910-A2-GN32-40 September 1998 Menu T ree Overview Pages A-2 and A-3 provide a menu tree for the 391x Series modems. A[...]

COMSPHERE 3900 Series Modems A-2 September 1998 3910-A2-GN32-40 Status Configure PList DeviceHS VF Identity DTE Backup Options Record Major Minor Status Dial Thresh Security Po r t1 SigQual 1 RcvLev el 1,2 Sig/Noise 1,2 NrEchLv 1 F arEchLv 1 F arEchDel 1 EchoF reqOff 1 NonLnearDist 2 Retrains 2 Ser# Mod# FRev HPt# FPt# LSD DTR DSR Ts t TXD RXD RTS [...]

Menu T ree A-3 3910-A2-GN32-40 September 1998 Control T est SubHS Tlk/Data Security Remote V42/MNP/Buffer Err Contrl Mode V42bis Compress MNP5 Compress EC Negotiat Bfr EC F allbck Char Flw Cntl of DTE Flw Cntl of Mdm XON/XOFF Psthru Mdm/Mdm FlowCtl Break Buffr Ctl Send Break Cntl BuffrDiscDela y Max F rame Size RdcdAsyncBufSiz Te s t DTE RL (CT140)[...]

COMSPHERE 3900 Series Modems A-4 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

B-1 3910-A2-GN32-40 September 1998 T roubleshooting Overview This appendix points out basic problems that can occur when operating a 391x Series modem. Use T ables B-1 through B-6 to check out these problems. If you are having data communication difficulties, such as periodic character loss, random errors, or constant format errors, use the loopbac[...]

COMSPHERE 3900 Series Modems B-2 September 1998 3910-A2-GN32-40 T able B-2 Leased-Line Operation Symptom Action The modems do not train-up on leased lines. V erify that the correct cabling is used for your application. Refer to Chapter 2, Modem Installation . V erify that one modem is configured for Answer mode and the other is configured for Origi[...]

T roubleshooting B-3 3910-A2-GN32-40 September 1998 T able B-4 Modem — DTE Connection Symptom Action The modem does not accept or echo back A T commands. V erify that the cable between the Async port of the DTE and the modem is a standard RS-232 cable. (Null modem cables, also known as crossover cables, do not work in this application.) V erify t[...]

COMSPHERE 3900 Series Modems B-4 September 1998 3910-A2-GN32-40 T able B-5 (1 of 2) Modem — VF Connection Symptom Action The modem does not receive a dial tone. Attach a telephone directly to the telephone line to verify that a dial tone exists. Make sure the VF line is connected to the modem ’ s rear jack labeled DIAL. The modem does not go of[...]

T roubleshooting B-5 3910-A2-GN32-40 September 1998 T able B-5 (2 of 2) Modem — VF Connection Symptom Action The modem does not go off-hook and begin dialing. If using A T Dialing, refer to T able B-4, Modem — DTE Connection. If using DTR Dialing, verify the telephone number stored in directory location 1, and verify that the DTE is raising DTR[...]

COMSPHERE 3900 Series Modems B-6 September 1998 3910-A2-GN32-40 T able B-6 Online Operation Symptom Action The data is scrambled. V erify that the character format (data bits, parity , and stop bits) is set to the same value in both modems. Data is missing during a transfer . V erify that you are using the same method of flow control for both the m[...]

C-1 3910-A2-GN32-40 September 1998 Pin Assignments Overview This appendix lists EIA-232-D and VF TELCO pin assignments and provides information about auxiliary cables which are not supplied. C[...]

COMSPHERE 3900 Series Modems C-2 September 1998 3910-A2-GN32-40 EIA-232-D Pin Assignments T able C-1 lists the EIA-232-D pin assignments for the modem. T able C-1 EIA-232-D Pin Assignments Pin Name EIA Circuit CCITT Signal Source Circuit Function 1 — AA 101 — Shield 2 TXD BA 103 DTE T ransmit Data 3 RXD BB 104 DCE Receive Data 4 RTS CA 105 DTE [...]

Pin Assignments C-3 3910-A2-GN32-40 September 1998 VF Connector Pin Assignments T able C-2 lists the connector pin assignments for Model 3910 modular jacks as well as the pin assignments for the TELCO jacks. (See Figure C-1.) T able C-2 VF Connector Pin Assignments T ype of T elco Jack Pin Leased Dial RJ1 1 JM8 6-Pin Leased 1 4-Wire: TX 2-Wire: TX/[...]

COMSPHERE 3900 Series Modems C-4 September 1998 3910-A2-GN32-40 Auxiliary Cables Not Supplied T o add an external telephone to your modem, use an external Y cable to connect the phone line to both the modem and the telephone (Figure C-2). Figure C-2. Wiring Diagram — Y Cable for External T elephone[...]

Pin Assignments C-5 3910-A2-GN32-40 September 1998 For 2-wire leased-line connections to a JM8 network interface, use an 8-position to 6-position crossover cable (Figure C-3) according to the following FCC requirements: “The RJ series of jacks should not be used for connecting data equipment to nonswitched private line networks — specifically ,[...]

COMSPHERE 3900 Series Modems C-6 September 1998 3910-A2-GN32-40 T o connect a Model 3910 port to another modem ’ s EIA-232-D interface, use a 25-pin crossover cable (Figure C-4). 1 2 3 4 5 6 7 8 25-POSITION PLUG PIN NO. 25-POSITION PLUG PIN NO. 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21[...]

D-1 3910-A2-GN32-40 September 1998 ITU-T V .25bis Dialing Commands and Responses Overview This appendix describes V .25bis dialing commands and responses. ITU-T V .25bis is an international dialing protocol that permits direct and stored number dialing using DTEs in either Asynchronous, Bisynchronous, or HDLC operating mode. The 391x Series modems [...]

COMSPHERE 3900 Series Modems D-2 September 1998 3910-A2-GN32-40 Call Request with Stored Memory Address Provided (CRS) The CRS command dials the telephone number stored in the request directory location. CRS is similar to the A TDS command. The CRS command format is: CRS x Where: x is directory location 1 – 24. The modem responds to the command w[...]

ITU-T V .25bis Dialing Commands and Responses D-3 3910-A2-GN32-40 September 1998 Delayed Call Indicator The DLC response is issued to the DTE if the modem is not currently allowed to call the number . DLC is similar to the A T result code DELA YED. The DLC response format is: DLC n Where: n is the delay (in minutes) before the number can be called.[...]

COMSPHERE 3900 Series Modems D-4 September 1998 3910-A2-GN32-40 Program Normal (PRN) The Program Normal (PRN) command allows the DTE to enter and store a telephone number to a specific directory location. PRN is similar to the A T&Z command. The PRN command format is: PRN x ; n Where: x is the directory location 1 – 24; n is the telephone num[...]

ITU-T V .25bis Dialing Commands and Responses D-5 3910-A2-GN32-40 September 1998 List Delayed Numbers Response (LSD) LSD is a response to an LSD command issued by DTE. LSD x ; n;d Where: x is a sequence number (not a directory location). n is the telephone number . d is the delay in minutes List Forbidden Numbers Response (LSF) The LSF response for[...]

COMSPHERE 3900 Series Modems D-6 September 1998 3910-A2-GN32-40 Invalid (INV) The INV response indicates that the modem has received an incorrect V .25bis command from the DTE. INV is similar to the A T result code ERROR. The INV response format is: INV xx Where: xx is CU command unknown. MS message syntax error . PS parameter syntax error . PV par[...]

ITU-T V .25bis Dialing Commands and Responses D-7 3910-A2-GN32-40 September 1998 T able D-2 lists V .25bis response messages supported by the 391x Series modems. T able D-2 V .25bis Response Messages V .25bis Command Description A T Command/ Result Code Equivalent Call Response CFI Call Failure Indication BUSY , NO ANSWER, NO CARRIER, NO DIAL TONE,[...]

COMSPHERE 3900 Series Modems D-8 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

E-1 3910-A2-GN32-40 September 1998 ASCII Character T able Overview T able E-1 in this appendix provides the ASCII character table. T able E-1 (1 of 4) ASCII Characters Hexadecimal ASCII V alue Decimal ASCII V alue Control Character Key 00 000 NUL CTRL-@ 01 001 SCH CTRL-A 02 002 STX CTRL-B 03 003 EXT CTRL-C 04 004 EOT CTRL-D 05 005 ENQ CTRL-E 06 006[...]

COMSPHERE 3900 Series Modems E-2 September 1998 3910-A2-GN32-40 T able E-1 (2 of 4) ASCII Characters Hexadecimal ASCII V alue Key Control Character Decimal ASCII V alue 19 025 EM CTRL-Y 1A 026 SUM CTRL-Z 1B 027 ESC CTRL-[ 1C 028 FS CTRL-/ 1D 029 GS CTRL-] 1E 030 RS CTRL-|Ax 1F 031 US CTRL-_ 20 032 spacebar 21 033 ! 22 034 “ 23 035 # 24 036 $ 25 0[...]

ASCII Character T able E-3 3910-A2-GN32-40 September 1998 T able E-1 (3 of 4) ASCII Characters Hexadecimal ASCII V alue Key Control Character Decimal ASCII V alue 3D 061 = 3E 062 > 3F 063 ? 40 064 @ 41 065 A 42 066 B 43 067 C 44 068 D 45 069 E 46 070 F 47 071 G 48 072 H 49 073 I 4A 074 J 4B 075 K 4C 076 L 4D 077 M 4E 078 N 4F 079 ) 50 080 P 51 0[...]

COMSPHERE 3900 Series Modems E-4 September 1998 3910-A2-GN32-40 T able E-1 (4 of 4) ASCII Characters Hexadecimal ASCII V alue Key Control Character Decimal ASCII V alue 61 097 a 62 098 b 63 099 c 64 100 d 65 101 e 66 102 f 67 103 g 68 104 h 69 105 i 6A 106 j 6B 107 k 6C 108 l 6D 109 m 6E 11 0 n 6F 111 o 70 11 2 p 71 11 3 q 72 11 4 r 73 11 5 s 74 11[...]

F-1 3910-A2-GN32-40 September 1998 Default Configuration Options Overview T able F-1 lists all default configuration options for the factory preset configurations. An N/A indicates that the value for this configuration option does not appear on the LCD when that factory default configuration is selected. F[...]

COMSPHERE 3900 Series Modems F-2 September 1998 3910-A2-GN32-40 T able F-1 (1 of 7) Factory Default Configuration Options Configuration Option Sync Leased Default Settings Async Leased Default Settings TMp Default Settings Async Dial Default Settings UNIX Dial Default Settings Sync Dial Default Settings DTE Interface Async/Sync Mode Sync Async Sync[...]

Default Configuration Options F-3 3910-A2-GN32-40 September 1998 T able F-1 (2 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings DTE Dialer DTE Dialer Type Dis able AT Disab[...]

COMSPHERE 3900 Series Modems F-4 September 1998 3910-A2-GN32-40 T able F-1 (3 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings Line Dialer Auto-Answer Ring Count 1 1 1 1 1 [...]

Default Configuration Options F-5 3910-A2-GN32-40 September 1998 T able F-1 (4 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings Leased Line Leased Mode 4-wire LL Answer (Sy[...]

COMSPHERE 3900 Series Modems F-6 September 1998 3910-A2-GN32-40 T able F-1 (5 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings V .42/MNP/ Buffer Error Control Mode N/A (Dir[...]

Default Configuration Options F-7 3910-A2-GN32-40 September 1998 T able F-1 (6 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings Misc Straps When Disconnected No Change No C[...]

COMSPHERE 3900 Series Modems F-8 September 1998 3910-A2-GN32-40 T able F-1 (7 of 7) Factory Default Configuration Options Configuration Option Sync Dial Default Settings UNIX Dial Default Settings Async Dial Default Settings TMp Default Settings Async Leased Default Settings Sync Leased Default Settings Security E n tr y Wa i t Ti m e 20 sec 20 sec[...]

G-1 3910-A2-GN32-40 September 1998 Sample Configurations Overview This appendix provides diagrams of sample configurations for the 391x Series modems. Following each diagram, the appropriate configuration options and cables are listed. G[...]

COMSPHERE 3900 Series Modems G-2 September 1998 3910-A2-GN32-40 Point-to-Point Figure G-1 shows a sample configuration for point-to-point applications. 3910 A Cable 1 Cable 1 Cable 2 Cable 2 Leased 19200(V32t) 19200(V32t) TX TX DTE (Sync) DTE (Sync) 3910 B Figure G-1. Sample Configuration — Point-to-Point Configuration Options 3910 A Use Sync Lea[...]

Sample Configurations G-3 3910-A2-GN32-40 September 1998 Multipoint Figure G-2 shows a sample configuration for multipoint applications. TMp control modems can accept mixed inbound rates from tributary modems. For example, one inbound link may be configured for 14.4 kbps while another link experiencing line impairments may be configured for 9.6 kbp[...]

COMSPHERE 3900 Series Modems G-4 September 1998 3910-A2-GN32-40 Point-to-Point with Automatic Dial Backup Figure G-3 shows a sample configuration for point-to-point applications with automatic dial backup. Cable 1 Cable 1 Cable 2 Cable 2 Leased 19200(V32t) 19200(V32t) TX TX Cable 3 Cable 3 Dial DTE (Sync) DTE (Sync) 3910 A 3910 B Figure G-3. Sample[...]

Sample Configurations G-5 3910-A2-GN32-40 September 1998 Point-to-Point with Network Management Figure G-4 shows a sample configuration for point-to-point applications with network management. NMS (6700 or 6800) Adapter (002-0025-0031) CC IN 3600- F3- 300 Hubbing Device Cable 4 3910 A Cable 1 Cable 1 Cable 2 Cable 2 Leased 19200(V32t) 19200(V32t) T[...]

COMSPHERE 3900 Series Modems G-6 September 1998 3910-A2-GN32-40 Carrier with Network Management Figure G-5 shows a sample configuration for COMSPHERE 3000 Series Carrier applications with network management. NMS (6700 or 6800) Adapter (002-0025-0031) CC IN SDU Circuit Card COMSPHERE 3000 Series Carrier Cable 4 391 1 Cable 1 Cable 1 Cable 2 Cable 2 [...]

Sample Configurations G-7 3910-A2-GN32-40 September 1998 Extended Multipoint Figure G-6 shows a sample configuration for extended multipoint applications. Cable 1 Cable 2 Cable 2 Leased 19200(V32t) 19200(V32t) TX TX Cable 1 Cable 1 Cable 1 4800 4800 4800 4800 Cable 1 Cable 1 Cable 1 Cable 5 4800 4800 4800 4800 DTE (Sync) DTE (Sync) DTE (Sync) DTE ([...]

COMSPHERE 3900 Series Modems G-8 September 1998 3910-A2-GN32-40 Configuration Options 3920 A Use Sync Leased (Answer) default configuration options with the following exception: Rate at 19.2K Set ports 1, 2, 3, and 4 to 4800. 3920 B Use Sync Leased (Originate) default configuration options with the following exceptions: TX Clock Source Set to RXC_L[...]

Sample Configurations G-9 3910-A2-GN32-40 September 1998 Extended Diagnostics Figure G-7 shows a sample configuration for extended diagnostics. Figure G-7. Sample Configuration  Extended Diagnostics Configuration Options 3910 A Use Sync Leased (Answer) default configuration options with the following exception: Network position Set to Control. 3[...]

COMSPHERE 3900 Series Modems G-10 September 1998 3910-A2-GN32-40 3910 D,F ,H Use Sync Leased (Answer) default configuration options with the following exceptions: TX Clock Source Set to RXC_Loop. 3910 E,G Use Sync Leased (Answer) default configuration options with the following exceptions: Diagnostic Connection Set to Modem (DC). Network Position S[...]

H-1 3910-A2-GN32-40 September 1998 Equipment List Equipment Feature/ Part Number Model 3910 3910-A1-40X Model 391 1 391 1-B1-00X 6-position, 4-wire modular cord, 7-foot length 125-0067-0031 8-position, 8-wire modular cord, 14-foot length 125-0053-1431 Universal Power Supply 327-0074-0131 3600 Hubbing Device 3600-F3-300 EIA-323-D/V .24 Crossover Cab[...]

COMSPHERE 3900 Series Modems H-2 September 1998 3910-A2-GN32-40 This page intentionally left blank.[...]

Glossary-1 3910-A2-GN32-40 September 1998 Glossary A configuration area containing configuration options currently in use by the modem. When a power cycle occurs, a reset is performed, or a save is issued using the DCP , this area is updated with the contents of Active (Saved). A nonvolatile configuration area containing the most recently saved con[...]

COMSPHERE 3900 Series Modems Glossary-2 September 1998 3910-A2-GN32-40 A unit of signaling speed that is equal to the number of symbols per second. This is not necessarily the same as bits per second, although the terms are frequently interchanged. A standard for 300 bps data transmission. A standard for 1200 bps data transmission. Latin for twice [...]

Glossary Glossary-3 3910-A2-GN32-40 September 1998 The modem transmits a carrier signal constantly , regardless of RTS. The diagnostic interface between a network management system and a network device. It polls downstream tributary modems across the analog channel. The mode in which the modem ’ s transmitter turns on and of f in response to RTS.[...]

COMSPHERE 3900 Series Modems Glossary-4 September 1998 3910-A2-GN32-40 A process that transfers device firmware and software from a locally-attached PC to a device, or allows the duplication of firmware and software from a local device to a remote device. A device that is connected farther from the host computer . Data T erminal Equipment. The equi[...]

Glossary Glossary-5 3910-A2-GN32-40 September 1998 A shared boundary between functional units. International T elecommunications Union. The telecommunications agency of the United Nations, established to provide standardized communications procedures and practices. Before March 1993 it was called CCITT . T he T elecommunications Standardization Sec[...]

COMSPHERE 3900 Series Modems Glossary-6 September 1998 3910-A2-GN32-40 Network Interface Module. The interface provided for the public switched telephone network (PSTN). There are two NIMs per carrier . Network Management System. A computer system used for monitoring and controlling network devices. VF line distortion which is usually associated wi[...]

Glossary Glossary-7 3910-A2-GN32-40 September 1998 A function available when in Dial Backup mode that allows the modem to switch to dial-line operation when currently on leased lines. A type of 6-position jack normally used with permissive dial networks and telephone sets. A type of 50-position jack normally used with permissive dial networks provi[...]

COMSPHERE 3900 Series Modems Glossary-8 September 1998 3910-A2-GN32-40 An ITU-T standard for modems operating full-duplex with asynchronous or synchronous data at 1200 or 2400 bps over the dial network (PSTN). An ITU-T standard dialing protocol that permits direct and stored-number dialing in asynchronous, bisynchronous, or HDLC modes. An ITU-T com[...]

Index-1 3910-A2-GN32-40 September 1998 Index A Abort (test), 8-2 – 8-10 ac power requirements, 1-9 Access from Remote, 5-49 Active (Operating) configurations, 5-1 Active (Saved) configurations, 5-1 address, network management, 5-50, 6-2 alarms, DTE and VF , 5-19 analog loopback test, 8-4 – 8-10 answer access security , 12-2 – 12-4 answering a[...]

COMSPHERE 3900 Series Modems Index-2 September 1998 3910-A2-GN32-40 D data compression, 5-40 MNP5, 5-40 V .42bis, 5-40 data rate dial line, 5-30 forced to VF rate, 5-18 leased line, 5-34 data rates. See rates DA T AKIT , 5-16, 5-20 default configuration options, 2-6 – 2-8, 5-1, F-2 – F-7 Diagnostic Connection, 5-51 diagnostic control panel (DCP[...]

Index Index-3 3910-A2-GN32-40 September 1998 I Identity , 4-6 indicators definitions, 3-6 status (LEDs), 3-3 – 3-5 installation Model 3910, 2-2 – 2-12 Model 391 1, 2-9 – 2-1 1 K keypad, 3-7 L LCD (liquid crystal display) description, 3-1, 3-6 menu structure, 3-8 messages, 3-8 – 3-14, 4-9 – 4-10 Lease Lookback, 5-38 leased backup operation[...]

COMSPHERE 3900 Series Modems Index-4 September 1998 3910-A2-GN32-40 P part numbers, 4-6, H-1 passwords administrative, 12-5 – 12-6 remote access, 5-5 – 5-8, 5-49, 13-2, 13-3, 13-4, 13-5 security , 12-2 – 12-4, 12-16 – 12-17 pattern test, 8-7 – 8-10 pause time, for comma in dial string, 5-26 phone. See telephone, external phone numbers. Se[...]

Index Index-5 3910-A2-GN32-40 September 1998 T est branch, 8-1 – 8-2 in menu structure, 3-8 T est configuration options group, 5-46 – 5-47 TMP default configurations. See default configuration options TMp T rain Time, 5-37 TMp T ransmit Preemphasis, 5-37 top-level menu messages, 3-8 – 3-14 train time TMp, 5-37 V .27bis, 5-37 V .32bis, 5-32 tr[...]

COMSPHERE 3900 Series Modems Index-6 September 1998 3910-A2-GN32-40[...]