AT&T 3550 manual

COMSPHERE 3550 Series Data Service Units Models 3550 and 3551 User ’ s Guide Document No. 3550-A2-GB20-10[...]

February 1995 COMSPHERE 3550 Series Data Service Units Models 3550 and 3551 User ’ s Guide Document No. 3550-A2-GB20-10 P a r a dyn e Printed on recycled paper[...]

COMSPHERE 3550 Series Data Service Units A February 1995 3550-A2-GB20-10 COMSPHERE Model 3550 and 3551 Data Service Units User ’ s Guide 3550-A2-GB20-10 2nd Edition (February 1995) Changes and enhancements to the product and to the information herein will be documented and issued as a new release. A customer opinion card is provided at the front [...]

Safety Instructions B 3550-A2-GB20-10 February 1995 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 is[...]

COMSPHERE 3550 Series Data Service Units C February 1995 3550-A2-GB20-10 Notices[...]

Safety Instructions D 3550-A2-GB20-10 February 1995 Government Requirements The Federal Communications Commission (FCC) requires that instructions pertaining to connection to the telephone network be included in the installation and operation manual. Specific instructions are listed in this section. Notice to Users of the Digital Data Service This [...]

COMSPHERE 3550 Series Data Service Units E February 1995 3550-A2-GB20-10 The DDS Service Order Number is 6.0Y . The jack configurations required are RJ48S for the Model 3550 DSU and RJ48T for the Model 3551. W ith an RJ48T configuration, you must specify the number of data lines you require. Refer to the T echnical Specifications section of Chapter[...]

i 3550-A2-GB20-10 February 1995 T able of Contents Preface About This Guide vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . How to Use This Guide vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Related Documents viii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units ii February 1995 3550-A2-GB20-10 4. Operating the DSU Overview 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCP and SDCP Operation 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure 4-4 . . . . . . . . . . . . . . . [...]

T able of Contents iii 3550-A2-GB20-10 February 1995 List of Figures Figure Page 2-1 Model 3550 Hardware Switch Location (shown without a TDM/Flex) 2-3 . . . . . . . . . . 2-2 Model 3550 Electrical Connection 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Model 3550 DSU NMS Connection 2-6 . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units iv February 1995 3550-A2-GB20-10 List of T ables T able Page 1-1 General T echnical Specifications 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 DSU T echnical Specifications 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 [...]

T able of Contents v 3550-A2-GB20-10 February 1995 T able Page C-1 DSU Status Indicators C-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2 SDCP Status Indicators C-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3 Device Health and Status Message[...]

COMSPHERE 3550 Series Data Service Units vi February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

vii 3550-A2-GB20-10 February 1995 Preface About This Guide This user ’ s guide provides the information needed to install and operate your Model 3550 or 3551 data service unit (DSU), which may or may not be equipped with a dial backup module (DBM) or time division multiplexer (TDM). If your DSU is not equipped with these options, skip the informa[...]

COMSPHERE 3550 Series Data Service Units viii February 1995 3550-A2-GB20-10 Related Documents Other product documentation includes the following: 3000-A2-GA31 COMSPHERE 3000 Series Carrier , Installation Manual 3000-A2-GB41 COMSPHERE – 48 Vdc Central Office Power Unit, Installation Guide 6700-A2-GB41 COMSPHERE 6700 Series Network Management Syste[...]

1-1 3550-A2-GB20-10 February 1995 About Y our DSU Overview 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Features 1-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units 1-2 February 1995 3550-A2-GB20-10 • Diagnostic Contr ol Panel control. The Model 3550 DSU is controlled from its diagnostic control panel (DCP). The diagnostic control panel for the Model 3551 DSU, called a shared diagnostic control panel (SDCP), is installed in the 3000 Series Carrier . Both control panel[...]

About Y our DSU 1-3 3550-A2-GB20-10 February 1995 2-Port TDM/Flex The 2-port TDM/Flex is a separate circuit card that attaches to the Model 3550 DSU. It allows independent ports to share one standard digital point-to-point facility . The 2-port TDM/Flex provides the following features: • Port capacity . This feature permits the DSU to operate as [...]

COMSPHERE 3550 Series Data Service Units 1-4 February 1995 3550-A2-GB20-10 T able 1-1 (1 of 2) General T echnical Specifications Specifications Criteria APPROV ALS FCC Part 15 FCC Part 68 UL 3550 DSU 3551 DSU, 3000 Series Carrier CSA Safety 3550 DSU 3551 DSU, 3000 Series Carrier Emissions Bell Canada Class A digital device A W292J-61661-DD-N Listed[...]

About Y our DSU 1-5 3550-A2-GB20-10 February 1995 T able 1-1 (2 of 2) General T echnical Specifications Specifications Criteria HEA T DISSIP A TION (MAX.) A T 1 15 VA C 3550 DSU 3550 DSU with DBM 3550 DSU with 2-Port TDM/Flex 3551 DSU 3551 DSU with DBM 3000 Series Carrier (16 DSUs with DBMs plus SDU and fan module) 22.16 Btu/hr 29.00 Btu/hr 29.21 B[...]

COMSPHERE 3550 Series Data Service Units 1-6 February 1995 3550-A2-GB20-10 T able 1-2 DSU T echnical Specifications Specifications Criteria APPLICA TION Full- or half-duplex data transmission via point-to-point or multipoint DDS network, or local area data channel COMMUNICA TION LINE Leased or private 4-wire DDS line DA T A RA TES Digital Services [...]

About Y our DSU 1-7 3550-A2-GB20-10 February 1995 T able 1-3 V .32 DBM T echnical Specifications Specifications Criteria RINGER EQUIV ALENCE NUMBER (REN) DBM option 0.7B APPLICA TION Full- or half-duplex data transmission via analog 2-wire dial network, point-to-point MODULA TION AND FREQUENCY At 14.4 and 12 kbps: CCITT V .32bis, 1800 Hz At 4.8 and[...]

COMSPHERE 3550 Series Data Service Units 1-8 February 1995 3550-A2-GB20-10 T able 1-4 2-Port TDM/Flex T echnical Specifications Specifications Criteria APPLICA TION Multiplexing Digital sharing Provides time division multiplexing of two independent ports. Allows consecutive ports to share the same TDM/Flex channel. PORT SYNCHRONOUS RA TES 1.2, 2.4,[...]

About Y our DSU 1-9 3550-A2-GB20-10 February 1995 Out of Warranty If your equipment is out of warranty and you do not have a maintenance support agreement, factory repair support is available. T o send equipment to A T&T Paradyne’ s Repair Center , call the following toll-free number Monday through Friday , between the hours of 8 a.m. and 5 p[...]

COMSPHERE 3550 Series Data Service Units 1-10 February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

2-1 3550-A2-GB20-10 February 1995 Installing the Model 3550 DSU Overview 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before Y ou Begin 2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units 2-2 February 1995 3550-A2-GB20-10 circuit must be capable of supplying a minimum of 2 amperes at 1 15 V ac. Refer to the T echnical Specifications section in Chapter 1 for additional power requirements. CAUTION The ac transformer contains a 3-wire grounding-type plug which has a grounding pin. This is a safe[...]

Installing the Model 3550 DSU 2-3 3550-A2-GB20-10 February 1995 Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex) T able 2-1 Model 3550 DSU Switch Settings Switch Position Switch Setting Function S1-1 ON (default) Permissive V .32 DBM transmit output level of –9 dBm S1 1 Off Programmable V .32 DBM transmit level between ?[...]

COMSPHERE 3550 Series Data Service Units 2-4 February 1995 3550-A2-GB20-10 Where to Place the DSU As mentioned earlier , the DSU must be placed within 6 feet of a dedicated grounded ac outlet that is protected by a circuit breaker . The distance between the DSU and its DTE must be within EIA-232-D/V .24 limits, or V .35 limits if operating the DSU [...]

Installing the Model 3550 DSU 2-5 3550-A2-GB20-10 February 1995 Power-Up Routine When power is applied, the DSU: • Determines what options (DBM or TDM/Flex) are installed, if any . • Runs a Device T est on itself and each of the installed options. During the tests, all indicators on the DCP light briefly and the message Power -Up T ests appears[...]

COMSPHERE 3550 Series Data Service Units 2-6 February 1995 3550-A2-GB20-10 Connecting to the NMS A 3600 Hubbing Device is required to connect the control DSU to the 6700 Series NMS. When connected to the NMS, the DSU can be controlled and configured from the NMS rather than from the DCP alone. Procedure 1. Plug the 4-pin modular plug of the 3600 Hu[...]

Installing the Model 3550 DSU 2-7 3550-A2-GB20-10 February 1995 Connecting to the DDS (or LADS) Network NOTE Before connecting the DSU to the DDS network, ensure that approved primary protectors have been installed on the circuit in accordance with Article 800 of the National Electric Code, NFP A 70, in the United States and Section 60 of the Canad[...]

COMSPHERE 3550 Series Data Service Units 2-8 February 1995 3550-A2-GB20-10 T able 2-2 LADS Connection Distances Data Rate Wire Gauge (A WG) Data Rate (kbps) 19 22 24 26 2.4 20.0 mi (32.2 km) 16.6 mi (26.7 km) 12.7 mi (20.5 km) 9.4 mi (15.1 km) 4.8 19.4 mi (31.2 km) 12.7 mi (20.5 km) 9.6 mi (15.4 km) 7.1 mi (1 1.5 km) 9.6 15.2 mi (24.5 km) 9.7 mi (1[...]

Installing the Model 3550 DSU 2-9 3550-A2-GB20-10 February 1995 T ributary DSU Addressing T ributary DSU addresses are user-definable, but take care that their addresses are unique on a multipoint circuit. If two tributaries ar e assigned the same addr ess, you will not be able to communicate with either one . The control DSU accesses its tributary[...]

COMSPHERE 3550 Series Data Service Units 2-10 February 1995 3550-A2-GB20-10 Connecting the DSU to a DTE The DSU’ s rear panel has both a 25-pin EIA-232-D/ V .24 connector and a 34-pin CCITT V .35 connector (used for higher operating speeds). Y ou can use either interface. When the unit is equipped with a TDM/Flex, either of these interfaces can b[...]

Installing the Model 3550 DSU 2-1 1 3550-A2-GB20-10 February 1995 Connecting Port 2 For the EIA-232 cable, install as described above. For the V .35 cable, install the V .35 Interconnect Cable, then the V .35 DTE cable as follows (refer to Figure 2-7). Procedure 1. Reconfigure the port to match the interface, V .35 in this example. 2. Connect the 2[...]

COMSPHERE 3550 Series Data Service Units 2-12 February 1995 3550-A2-GB20-10 V erifying DBM Operation If a DBM is installed, test the tributary DBM for dial tone, and verify that the DSU can place and receive calls. Procedure 1. Select Bckup (F2). 2. Select Dial to establish a dialed call to the tributary . (Refer to Chapter 4 for the procedure for [...]

3-1 3550-A2-GB20-10 February 1995 Installing the Model 3551 DSU Overview 3-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Before Y ou Begin 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units 3-2 February 1995 3550-A2-GB20-10 Before Y ou Begin The COMSPHERE 3000 Series Carrier should already be installed properly and be operational, with a functioning shared diagnostic control panel (SDCP). An SDCP (installed in the carrier) is required for installation and maintenance of the Model 3551 DSU. For [...]

Installing the Model 3551 DSU 3-3 3550-A2-GB20-10 February 1995 Figure 3-1. Model 3551 DSU Switch and Jumper Locations T able 3-1 Model 3551 DSU Switch Settings Switch Position Switch Setting Function S1-1 ON (default) Permissive V .32 DBM transmit output level of –9 dBm S1 - 1 Off Programmable V .32 DBM transmit level between –12 dBm and 0 dBm[...]

COMSPHERE 3550 Series Data Service Units 3-4 February 1995 3550-A2-GB20-10 T able 3-2 Model 3551 DSU Jumper Straps Strap Designation State of Jumper Strap Function J12 Left V .35 T est Mode Indication: Left — Enables V .35 T est Mode Indication (Pins 1 and 2). This is the factory default. Right — Disables V .35 T est Mode Indication (Pins 2 and[...]

Installing the Model 3551 DSU 3-5 3550-A2-GB20-10 February 1995 Installing the DSU The initial installation procedure for the Model 3551 DSU requires the installation of a rear connector plate onto the rear of the COMSPHERE 3000 Series Carrier (Figure 3-2). After the initial installation, the DSU can be installed or de-installed by simply removing [...]

COMSPHERE 3550 Series Data Service Units 3-6 February 1995 3550-A2-GB20-10 4. Using a Phillips screwdriver , loosen the screw holding the circuit pack lock and rotate the lock to the open position (Figure 3-3). Open the latch. 5. At the front of the carrier , hold the DSU vertically with the latch on its faceplate in the open position. Then, insert[...]

Installing the Model 3551 DSU 3-7 3550-A2-GB20-10 February 1995 7. At the rear of the carrier , connect the appropriate DTE interface cable (EIA-232-D or V .35) to the rear connector plate. For an EIA-232-D interface cable, connect the EIA-232-D cable to the top DTE connector on the rear connector plate. For the 25-pin V .35 interface, a V .35 inte[...]

COMSPHERE 3550 Series Data Service Units 3-8 February 1995 3550-A2-GB20-10 Power-Up Routine When power is applied, the DSU: • Determines what options (DBM or TDM/Flex) are installed, if any . • Runs a Device T est on itself and each of the installed options. During the tests, all indicators on the DCP light briefly and the message Power -Up T e[...]

Installing the Model 3551 DSU 3-9 3550-A2-GB20-10 February 1995 Connecting to the DDS (or LADS) Network NOTE Before connecting the DSU to the DDS network, ensure that approved primary protectors have been installed on the circuit in accordance with Article 800 of the National Electric Code, NFP A 70, in the United States and Section 60 of the Canad[...]

COMSPHERE 3550 Series Data Service Units 3-10 February 1995 3550-A2-GB20-10 T ributary DSU Addressing T ributary DSU addresses are user-definable, but take care to ensure that their addresses are unique on a multipoint circuit. If two tributaries ar e assigned the same addr ess, you will not be able to communicate with either one . The control DSU [...]

Installing the Model 3551 DSU 3-1 1 3550-A2-GB20-10 February 1995 T o Connect the SDCP to a DSU For the carrier-mounted Model 3551 DSU, the SDCP must first be reconnected to the DSU. Once connected, the SDCP operates like a DCP . Procedure 1. Press the Select key (refer to Figure 3-2). A screen similar to the following appears. F1 F2 F3 Carr:Slot: [...]

COMSPHERE 3550 Series Data Service Units 3-12 February 1995 3550-A2-GB20-10 Other T ests The following lists the tests available on your DSU. Refer to the T est Branch section of Chapter 4 for further test information, as well as more detail on how to configure and operate the DSU. Refer to Appendix A to determine how best to access each test. • [...]

4-1 3550-A2-GB20-10 February 1995 Operating the DSU Overview 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCP and SDCP Operation 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

COMSPHERE 3550 Series Data Service Units 4-2 February 1995 3550-A2-GB20-10 Control Branch 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T ransmitter Control 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

Operating the DSU 4-3 3550-A2-GB20-10 February 1995 Figure 4-2. SDCP and Model 3551 DSU Faceplate Both control panels have a 2-line, 16-character liquid crystal display (LCD) and a keypad, through which you can • Monitor the unit’ s health and status • Initiate dial backup • Initiate diagnostic tests • Load or change the unit’ s configu[...]

COMSPHERE 3550 Series Data Service Units 4-4 February 1995 3550-A2-GB20-10 F1 F2 F3 • The key returns you to the top-level menu, and terminates any work in progress. • The key returns you to the previous display , one level up from the current display . It can also be used to terminate a data entry display without making a change. • The and k[...]

Operating the DSU 4-5 3550-A2-GB20-10 February 1995 Expanded Health and Status Expanded Health and Status ( Expan ) only appears during automatic dialing. It retrieves Health and Status information for the local DSU after an automatic backup attempt has failed, or when there is a disconnect after a successful connection. If the right arrow ( → ) [...]

COMSPHERE 3550 Series Data Service Units 4-6 February 1995 3550-A2-GB20-10 T able 4-1 Identity Descriptions Description Information Displayed Model: 3550 or 3551. S#: Unit serial number . DSU SW ver: Software/firmware version residing on DSU. Netwrk Addr: Unit’s network address. DSU Rate: V alue set for DSU Rate(Kbps) configuration option. DBM Ra[...]

Operating the DSU 4-7 3550-A2-GB20-10 February 1995 If the tributary DSU is to initiate the call , set the control for Cllbk and the tributary for Pswrd. External DBU Option Set (This option set will not appear if a DBM is installed.): • ExtBU – Select whether the external DBU will answer or place backup calls. The external DBU must be able to [...]

COMSPHERE 3550 Series Data Service Units 4-8 February 1995 3550-A2-GB20-10 T able 4-2 Backup Branch Menu Selections Current Backup Mode Backup Command Effect Idle Bkup Dial Dial out, establish, and switch to dialed link (Dial Backup mode). Dial out and establish dialed link (Standby mode). (Data is routed over the DDS circuit.) Standby Disc → Dia[...]

Operating the DSU 4-9 3550-A2-GB20-10 February 1995 T est Branch The T est branch provides extensive testing capabilities for the DSU, the DDS circuit, the DBM (if installed), and the backup circuit. When the tributary DSU receives a test request from the control DSU, it aborts any locally initiated test in progress. Running a test can affect your [...]

COMSPHERE 3550 Series Data Service Units 4-10 February 1995 3550-A2-GB20-10 NOTE T o issue a Local Loopback to a tributary DSU , the DSU must have a DBM installed or a Conflict w/ Environ message will appear . The DBM is required to call the tributary and abort the Local Loopback. If the NMS is to abort the loopback, the tributary’s DBM must be i[...]

Operating the DSU 4-1 1 3550-A2-GB20-10 February 1995 T able 4-3 Digital T est Results Results Information Displayed T ime: Running test timer . (The Clr selection resets the timer to 0:00:00.) T ot Error: Running count of bits in error; Max, if the maximum error count has been reached, the maximum being 64000. (The Clr selection resets the counter[...]

COMSPHERE 3550 Series Data Service Units 4-12 February 1995 3550-A2-GB20-10 T able 4-5 Bit Error Rate T est Results Results Information Displayed T ime: Running test timer . (The Clr selection resets the timer to 0:00:00.) T ot Error: Running count of bits in error; Max, if the maximum error count has been reached, which is 64000. (The Clr selectio[...]

Operating the DSU 4-13 3550-A2-GB20-10 February 1995 6. Select the mode: • Enable Full Mode (F2) – All configuration options will be displayed. • Disable Full Mode (F3) – Only those configuration options likely to change will be displayed. When the selection is made, it is displayed on the first line of the LCD (e.g., Full Mode: Disab). 7. [...]

COMSPHERE 3550 Series Data Service Units 4-14 February 1995 3550-A2-GB20-10 5. Select Save (F1). The Save to screen appears. 6. Select Activ (F1). The selected application’ s configuration is saved to the DSU’ s Active operating area, and the Command Complete message appears. Configuration Options The Configuration Options ( Opts ) subbranch al[...]

Operating the DSU 4-15 3550-A2-GB20-10 February 1995 16. Select SA VE (F1). 17. Save to Activ (F1). Command Complete appears to confirm that the configuration is saved. Poll List The Poll List ( PList ) subbranch maintains or changes the DSU’ s poll list. A control DSU’ s poll list includes all tributary DSUs and DBMs one level downstream. Y ou[...]

COMSPHERE 3550 Series Data Service Units 4-16 February 1995 3550-A2-GB20-10 T o delete a network address (e.g., 3) from the poll list: Procedure F1 Chng Poll List: Activ Delet Skip F2 F3 1. Select Delet (F2). F1 Address: 3 Enter F2 F3 2. Select Enter (F3). In this example, 3 was just added, so it is the address displayed. If another address needs t[...]

Operating the DSU 4-17 3550-A2-GB20-10 February 1995 Directory The DSU’ s dial backup Directory ( Dir ) can store up to ten telephone numbers (dial strings) so the DBM can call other DBMs or modems. Directory entries are numbered from 1 to 10. Each dial string in the directory can be up to 36 characters in length. Refer to T able 4-6 for numbers [...]

COMSPHERE 3550 Series Data Service Units 4-18 February 1995 3550-A2-GB20-10 10. Press the key to return to the Enter Dir screen. 1 1. Press the F3 key to Save the entry . 12. V erify that the number was loaded by pressing the key again and selecting Load (F2). The telephone number should appear as entered, or you can repeat the procedure to edit/co[...]

Operating the DSU 4-19 3550-A2-GB20-10 February 1995 6. Select Save (F2). The DSU displays the address assigned along with a Command Complete message. If an error was made in entering the address: Procedure 1. Press the key to return to the Configur e screen. 2. Re-select Addr , and re-edit the address. 3. Select Save again. Control Branch The Cont[...]

COMSPHERE 3550 Series Data Service Units 4-20 February 1995 3550-A2-GB20-10 T able 4-7 Lead States Symbol Meaning Off (below text line) ON (above text line) Changing ? Indicates an illegal value NOTES: Input leads A and B: Off ( ) when voltage on lead is less than +.8V . ON ( ) when voltage on lead is more than +2.2V . Output leads are either ON or[...]

5-1 3550-A2-GB20-10 February 1995 Configuring the Unit Overview 5-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the DCP to Set Configuration Options 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units 5-2 February 1995 3550-A2-GB20-10 Once loaded, the following Edit/Save submenu appears: F1 Edit / Save: SA VE DSU DBM F2 F3 Press the or key to scroll the following configuration option sets into view: DSU, Diagnostic (DSU, DBM, External DBU, and General), DBM, External DBU, General, Backup, MUX (Copy , Setu[...]

Configuring the Unit 5-3 3550-A2-GB20-10 February 1995 Saving Configuration Options CAUTION Be extremely careful when saving configuration options to avoid saving them to the wrong location. T o save edited configuration options: Procedure 1. From any configuration option in any option set, press the key to return to the Edit/Save submenu. 2. Press[...]

COMSPHERE 3550 Series Data Service Units 5-4 February 1995 3550-A2-GB20-10 F1 Edit / Save: SA VE DSU Diag F2 F3 F1 Chang Diag Opts: DSU DBM Gen F2 F3 F1 Diag T ype: Disr Next NonD Disr F2 F3 F1 Diag T ype: NonD Next NonD Disr F2 F3 F1 Chang Diag Opts: DSU DBM Gen F2 F3 F1 Edit / Save: SA VE DSU Diag F2 F3 F1 Edit / Save: DSU Diag DBM F2 F3 F1 Edit [...]

Configuring the Unit 5-5 3550-A2-GB20-10 February 1995 F1 Port 1 DSU 9.6 T Local Remot F2 F3 This example is now complete. Configuration Option T ables This section contains a table for each option set that can be found under the Configuration (Confg) branch, in the order in which it appears in the menu. Each table lists all configuration options a[...]

COMSPHERE 3550 Series Data Service Units 5-6 February 1995 3550-A2-GB20-10 T able 5-1 (1 of 2) DSU Configuration Options Rate(Kbps): 9.6 Next 64L 56 38.4 19.2 9.6 4.8 2.4 Prev DSU Rate . Sets the data rate (in kbps) of the DSU, which must be set to match the speed of the digital (DDS) circuit. 64L — Select for 64 kbps LADS operation. 56 to — Se[...]

Configuring the Unit 5-7 3550-A2-GB20-10 February 1995 T able 5-1 (2 of 2) DSU Configuration Options RxElasStor: Disab Next Enab Disab Prev Receive Elastic Store (only displayed when Full Mode is enabled). The DSU receives data using a receive data buffer on the DSU’s received data (RXD) lead. This configuration option only supports single-port D[...]

COMSPHERE 3550 Series Data Service Units 5-8 February 1995 3550-A2-GB20-10 T able 5-2 Diagnostic (DSU) Configuration Options Diag T ype: Disr Next NonD Disr Mixed None Prev Diagnostic T ype . This configuration option defines the diagnostic interaction between control and tributary DSUs. All DSUs on the same circuit should be set the same (e.g., if[...]

Configuring the Unit 5-9 3550-A2-GB20-10 February 1995 T able 5-3 Diagnostic (DBM) Configuration Options Diag T ype: Disr Next NonD Disr Mixed None Prev Diagnostic T ype . This configuration option defines the diagnostic interaction between control and tributary DSUs that are in backup. All DSUs on the same circuit should be set the same (e.g., if [...]

COMSPHERE 3550 Series Data Service Units 5-10 February 1995 3550-A2-GB20-10 T able 5-4 Diagnostic (External DBU) Configuration Options Diag T ype: Disr Next Disr None Prev Diagnostic T ype . This configuration option defines the diagnostic interaction between control and tributary DSUs that are in backup using an external dial backup unit (DBU). Al[...]

Configuring the Unit 5-1 1 3550-A2-GB20-10 February 1995 T able 5-5 (2 of 2) Diagnostic (General) Configuration Options T ribT imOut: 0:10 Next Chang Prev T ributary Time-out , specified in minutes and seconds (only displayed when any Diag T ype is set to NonD or Mixed, LinkConfig is set to M-Pt, and Full Mode is enabled). This configuration option[...]

COMSPHERE 3550 Series Data Service Units 5-12 February 1995 3550-A2-GB20-10 T able 5-6 (1 of 4) DBM Configuration Options Rate(Kbps): 9.6 Next 14.4 12.0 9.6 4.8 2.4 Prev DBM Rate . Sets the initial data rate (in kbps) of the DBM for backup calls over the dial circuit. 14.4 to — Select the data rate for V .32bis modulation. The rate 14.4 is not di[...]

Configuring the Unit 5-13 3550-A2-GB20-10 February 1995 T able 5-6 (2 of 4) DBM Configuration Options Single Rate: Y es Next Y es No Prev Single Rate (only displayed when Full Mode is enabled). Determines whether the DBM will adjust its rate to resolve a rate mismatch with a remote DBM or modem with the following limitations. NOTE: If the DBM Rate([...]

COMSPHERE 3550 Series Data Service Units 5-14 February 1995 3550-A2-GB20-10 T able 5-6 (3 of 4) DBM Configuration Options Call Setup:None Next None Pswrd Cllbk Alarm Prev Dial Backup Call Setup (only displayed when Full Mode is enabled). Establishes the level of security for call setup attempts. This configuration option prevents an invalid call fr[...]

Configuring the Unit 5-15 3550-A2-GB20-10 February 1995 T able 5-6 (4 of 4) DBM Configuration Options V .13 Signl: Enab for MPTC and MPTT ; Disab for other configurations Next Enab Disab Prev V .13 Signaling (only displayed when Full Mode is enabled). V .13 signaling applies to the DBM when the DBM is in Dial Backup mode. The normal RTS/CTS delay i[...]

COMSPHERE 3550 Series Data Service Units 5-16 February 1995 3550-A2-GB20-10 T able 5-7 External DBU Configuration Options ExtBU: None Next Ansr Orig None Prev External Backup Unit . This feature allows dial backup for a DSU using an external dial backup unit (DBU). Ansr — Select for the external DBU to answer an incoming dial backup call. Orig ?[...]

Configuring the Unit 5-17 3550-A2-GB20-10 February 1995 T able 5-8 (1 of 4) General Configuration Options DTE Port: EIA232 Next EIA232 V .35 Prev DTE Port (not displayed when a TDM/Flex is installed and enabled). Selects the active DTE interface. EIA232 — Select when using the EIA-232 interface (connector). EIA232 operation is recommended for spe[...]

COMSPHERE 3550 Series Data Service Units 5-18 February 1995 3550-A2-GB20-10 T able 5-8 (2 of 4) General Configuration Options LSD Lead: Std Next Std Delay FrcOn Prev Line Signal Detect Lead (only displayed when Full Mode is enabled). Controls behavior of the LSD lead. Std — Select standard so that the LSD lead goes Off when a control mode idle (C[...]

Configuring the Unit 5-19 3550-A2-GB20-10 February 1995 T able 5-8 (3 of 4) General Configuration Options LL by DTE: Disab Next Enab Disab Prev Local Loopback by DTE (only displayed when Full Mode is enabled). Controls the use of Pin 18 of the EIA-232-D/V .24 interface or Pin L of the V .35 interface by the DTE to initiate a Local Loopback when the[...]

COMSPHERE 3550 Series Data Service Units 5-20 February 1995 3550-A2-GB20-10 T able 5-8 (4 of 4) General Configuration Options DTR Alarm: Disab Next Enab Disab Prev Data T erminal Ready Alarm (only displayed when Full Mode is enabled, and a TDM/Flex is not installed). Causes the DSU to generate an alarm if DTR is Off for more than 30 seconds. The DC[...]

Configuring the Unit 5-21 3550-A2-GB20-10 February 1995 T able 5-9 (1 of 2) Backup Configuration Options Auto Bckup:Disab Next Enab Disab Prev Automatic Backup (only displayed when a DBM is installed, or an external DBU is configured to originate backup). Controls automatic initiation of a call setup attempt to a remote DBM or modem when there is a[...]

COMSPHERE 3550 Series Data Service Units 5-22 February 1995 3550-A2-GB20-10 T able 5-9 (2 of 2) Backup Configuration Options RestorT imOut: 5m Next Chang Prev Restoration Time-out (only displayed when Full Mode is enabled). Specifies the length of time the DDS network must be back in service before automatic restoration is attempted. ( Auto Restor [...]

Configuring the Unit 5-23 3550-A2-GB20-10 February 1995 T able 5-10 MUX (Setup) Configuration Options MUX Funct: Disab for MPTC; Enab for all other configurations Next Enab Disab Prev TDM/Flex Function . Enables or disables the TDM/Flex. Enab — Select when you want to enable the TDM/Flex and perform multiplexing. Disab — Select when you want to[...]

COMSPHERE 3550 Series Data Service Units 5-24 February 1995 3550-A2-GB20-10 T able 5-1 1 (2 of 4) MUX (Port) Configuration Options* Async Rate: =Sync Next =Sync 1800 1200 600 300 150 Prev Asynchronous Rate . Specifies the rate of an asynchronous port. The asynchronous rate must be less than or equal to the synchronous data rate of the port. Set the[...]

Configuring the Unit 5-25 3550-A2-GB20-10 February 1995 T able 5-1 1 (3 of 4) MUX (Port) Configuration Options* TxCarrSel: Const Next Const Cntrl Prev T ransmitter Carrier Select (only displayed when Full Mode is enabled). Enables the TDM/Flex transmitter circuitry to simulate switched-carrier operation (using the V .13 codes) on an individual chan[...]

COMSPHERE 3550 Series Data Service Units 5-26 February 1995 3550-A2-GB20-10 T able 5-1 1 (4 of 4) MUX (Port) Configuration Options* Elast Stor: Disab Next Enab Disab Prev Elastic Store (only displayed when Full Mode is enabled). Elastic Store hardware consists of a transmit buffer (register). Serial data from the extended circuit is clocked into th[...]

Configuring the Unit 5-27 3550-A2-GB20-10 February 1995 T able 5-12 Port Speed (DSU) Configuration Options Prt1( 9.6): 9.6 Next 64 56 48 19.2 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed . Primary data rate in kbps on Port 1. (Must be set to the same value in the remote DSU.) 64 to — Select to set the port’s operating rate. 1.2 kbps Disab — Select[...]

COMSPHERE 3550 Series Data Service Units 5-28 February 1995 3550-A2-GB20-10 T able 5-13 Port Speed (DBM) Configuration Options Prt1( 9.6): 9.6 Next 14.4 56 12.0 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed . Primary data rate in kbps on Port 1. (Must be set to the same value in the remote DBM.) 14.4 to — Select to set the port’s operating rate. 1.2 [...]

Configuring the Unit 5-29 3550-A2-GB20-10 February 1995 T able 5-14 Port Speed (External DBU) Configuration Options Prt1( 9.6): 9.6 Next 64 56 48 28.8 19.2 14.4 9.6 4.8 2.4 1.2 Disab Prev Port 1 Speed . Primary data rate in kbps on Port 1. (Must be set to the same value in the external DBU.) 64 to — Select to set the port’s operating rate. 1.2 [...]

COMSPHERE 3550 Series Data Service Units 5-30 February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

A-1 3550-A2-GB20-10 February 1995 DSU Menu Overview A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Menu Structure A-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

COMSPHERE 3550 Series Data Service Units A-2 February 1995 3550-A2-GB20-10[...]

DSU Menu A-3 3550-A2-GB20-10 February 1995[...]

COMSPHERE 3550 Series Data Service Units A-4 February 1995 3550-A2-GB20-10 Continued fr om Page A-1 . Press a function key to select one of the following branches: • Local branch • Remote branch – Only available to a DSU configured as a control or a point-to-point tributary . • Messages branch – Only appears when a message from the NMS is[...]

B-1 3550-A2-GB20-10 February 1995 Configuration W orksheets Overview B-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instructions B-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

Model 3550 or 3551 DSU Configuration Worksheet (1 of 2) (Full Menu Mode: Enabled) Date:_______________________________________________ Location:____________________________________________ Local Phone No: ( ) _____________________________ Device:_____________________________________________ Local Addr:__________________________________________ DBM [...]

Model 3550 or 3551 DSU Configuration Worksheet (2 of 2) (Full Menu Mode: Enabled) Backup V alue Auto Bckup Enab, Disab Backup Dir (Chang) (1–10) FacAlOnCMI Enab, Disab AutoRestor Enab, Disab NtwkT imOut (Chang) min and sec (1 to 30 min) RestorT imOu t (Chang) min and sec (1 to 60 min) T riesTimeOut (Chang) min and sec (1 to 60 min) MultiCall Enab[...]

Model 3550 or 3551 DSU Configuration Worksheet (1 of 2) (Full Menu Mode: Disabled) Date:_______________________________________________ Location:____________________________________________ Local Phone No: ( ) _____________________________ Device:_____________________________________________ Local Addr:__________________________________________ DBM[...]

Model 3550 or 3551 DSU Configuration Worksheet (2 of 2) (Full Menu Mode: Disabled) MUX (Setup) V alue MUX Funct Enab, Disab Share DevA Enab, Disab Port Cntrl Host, DSD Hardware Straps Value DDS Interface Permissive, Programmable Frame Ground/ Signal Ground Connected, Disconnected T est Mode indication Enalbed, Disabled MUX (Port 1) V alue DTE Port [...]

COMSPHERE 3550 Series Data Service Units B-6 January 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

C-1 3550-A2-GB20-10 February 1995 Status Indicators and Control Panel Messages Overview C-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Status Indicators C-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

COMSPHERE 3550 Series Data Service Units C-2 February 1995 3550-A2-GB20-10 T able C-1 DSU Status Indicators Label Color Description OK Green Health and status indicator: DSU operation is normal. (The DSU has not detected any of the faults listed under Alrm, below .) This indicator flashes two times per second if a message from the NMS is present. A[...]

Status Indicators and Control Panel Messages C-3 3550-A2-GB20-10 February 1995 Control Panel Messages This section shows the screen format of messages appearing on the control panel and describes the various messages. Three types of messages are included: health and status, progress, and error messages. Format The format of the control panel messag[...]

COMSPHERE 3550 Series Data Service Units C-4 February 1995 3550-A2-GB20-10 T able C-3 (2 of 3) Device Health and Status Messages Message Condition Dial T one:Fail Dial tone test was enabled and test failed. DDS F: alarm Digital facility alarm; alarm is one of the following network alarms: BiplrViol — Excessive Bipolar Violations Fac Alarm — Fac[...]

Status Indicators and Control Panel Messages C-5 3550-A2-GB20-10 February 1995 T able C-3 (3 of 3) Device Health and Status Messages Message Condition MUX Device Fail Internal failure in the TDM/Flex is detected. MUX CommunicFail No reply from TDM/Flex. The DSU periodically polls the TDM/Flex for health and status. When the DSU does not receive a r[...]

COMSPHERE 3550 Series Data Service Units C-6 February 1995 3550-A2-GB20-10 T able C-4 Expanded Health and Status Messages Message Condition Dial Attempt: nn The number ( nn ) of failures of dialing attempts since failure of private-line service. This message is cleared when the automatic backup process succeeds or the backup process is reset due to[...]

Status Indicators and Control Panel Messages C-7 3550-A2-GB20-10 February 1995 T able C-5 Subnetwork Health and Status Messages Message Condition Devic TDM/Flex only: Device Failure. One of the following major alarms is in effect: Configuration Corrupt Device T est Failure MUX Device Failure DialBU Dial BackUp mode. Indicates that the DBM is active[...]

COMSPHERE 3550 Series Data Service Units C-8 February 1995 3550-A2-GB20-10 Progress Messages T able C-6 describes the command progress messages, and T able C-7 describes the dial backup progress messages. T able C-6 Command Progress Messages Message Condition Please wait . . . Command is taking more than 2 seconds to complete. Command Complete Comm[...]

Status Indicators and Control Panel Messages C-9 3550-A2-GB20-10 February 1995 Error Messages T able C-8 describes the command error messages, T able C-9 describes the dial backup error messages, and T able C-10 describes the TDM/Flex error messages. T able C-8 Command Error Messages Message Condition Action Conflict w/Envir Command conflicts with [...]

COMSPHERE 3550 Series Data Service Units C-10 February 1995 3550-A2-GB20-10 T able C-9 Dial Backup Error Messages Message Notify NMS 1 Condition Action DBM: Busy Ye s T elephone line associated with remote DBM is busy . Try again. T ry another number if possible, or investigate why the line is busy . DBM: Call Aborted No Call was aborted from the D[...]

Status Indicators and Control Panel Messages C-1 1 3550-A2-GB20-10 February 1995 T able C-10 (1 of 3) TDM/Flex Error Messages Message Condition Action All Async >Aggr All ports of the TDM/Flex are configured for asynchronous operation and their combined corresponding synchronous rate exceeds the value for the DSU, DBM, or ExtBU Rate(Kbps) config[...]

COMSPHERE 3550 Series Data Service Units C-12 February 1995 3550-A2-GB20-10 T able C-10 (2 of 3) TDM/Flex Error Messages Message Action Condition Invalid timing A TDM/Flex port (Prt1 or Prt2) was previously selected as the source of external timing when the TDM/Flex was enabled. Now , the TDM/Flex is enabled. Set TxClkSource to any of the valid tim[...]

Status Indicators and Control Panel Messages C-13 3550-A2-GB20-10 February 1995 T able C-10 (3 of 3) TDM/Flex Error Messages Message Action Condition Sync >Async Req The port’s asynchronous rate setting requires that more capacity (bandwidth) be allocated to the port. Asynchronous rates of 150, 300, 600, and 1200 bps require the allocation of [...]

COMSPHERE 3550 Series Data Service Units C-14 February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

D-1 3550-A2-GB20-10 February 1995 Pin Assignments Overview D-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overview Pin assignments for the 3550 Series DSU connectors and interfaces are included here. Refer to them as needed. Figure D-1 shows the[...]

COMSPHERE 3550 Series Data Service Units D-2 February 1995 3550-A2-GB20-10 T able D-1 Model 3550 – Digital (DDS) Network 8-Pin Cable Connector Pin Assignments Pin Circuit Function 1 R1 T ransmit data to local loop 2 T1 T ransmit data to local loop 7 T Received data from local loop 8 R Received data from local loop T able D-2 Model 3550 – Dial ([...]

Pin Assignments D-3 3550-A2-GB20-10 February 1995 T able D-3 3600 Hubbing Device Pin Assignments Pin # Signal Name Input/Output 1 +5 Vdc Input 2 DCOSD/CCIRD Input 3 Signal Ground Ground 4 DCORD/CCISD Output T able D-4 3600 Hubbing Device CC IN/DC OUT Jack Pin Assignments Pin # Signal Name In/Out CC IN DC OUT 1 –V Pass-Through — N/C N/C 2 DCOCTS[...]

COMSPHERE 3550 Series Data Service Units D-4 February 1995 3550-A2-GB20-10 Figure D-3. Model 3551 DSU 25-Pin EIA-232/25-Pin V .35 Rear Connector Plate (3000-F1-021)[...]

Pin Assignments D-5 3550-A2-GB20-10 February 1995 T able D-5 EIA-232/V .24 Connector Pin Assignments Pin Circuit Name Function Pi n EIA-232 CCITT F unc ti on 2 BA 103 Transmit Data (TXD) 3 BB 104 Received Data (RXD) 4 CA 105 Request-to-Send (RTS) 5 CB 106 Clear-to-Send (CTS) 6 CC 107 Data Set Ready (DSR) 7 AB 102 Signal Ground (SG) 8 CF 109 Receive[...]

COMSPHERE 3550 Series Data Service Units D-6 February 1995 3550-A2-GB20-10 Figure D-4. V .35 Interconnect Cable (3000-F1-510)[...]

Pin Assignments D-7 3550-A2-GB20-10 February 1995 T able D-6 V .35 Connector Pin Assignments 25-Pin Connector (Rear Connector Plate) 34-Pin Connector (V .35 Interconnect Cable) Circuit Name Pin Number Pin Number 7 B Signal Ground 4 C Request-to-Send (R TS) 5 D Clear-to-Send (CTS) 6 E Data Set Ready (DSR) 8 F Received Line Signal Detect (LSD) 20 H D[...]

COMSPHERE 3550 Series Data Service Units D-8 February 1995 3550-A2-GB20-10 Figure D-5. EIA-232-D Crossover Cable (4951-035F)[...]

Pin Assignments D-9 3550-A2-GB20-10 February 1995 Figure D-6. V .35 Crossover Cable (321 1-178F)[...]

COMSPHERE 3550 Series Data Service Units D-10 February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

E-1 3550-A2-GB20-10 February 1995 Application Configurations Overview E-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Point-to-Point Applications E-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

COMSPHERE 3550 Series Data Service Units E-2 February 1995 3550-A2-GB20-10 Figure E-1. Point-to-Point Application Configurations with Internal and External V .32 Backup[...]

Application Configurations E-3 3550-A2-GB20-10 February 1995 Multipoint Applications Model 3550 and Model 3551 DSUs also provide high-speed multipoint circuit support. The network can be controlled from the DSU’ s control panel or a 6700 Series NMS. Figure E-2 shows sample multipoint configurations. Using this application, backup is provided via [...]

COMSPHERE 3550 Series Data Service Units E-4 February 1995 3550-A2-GB20-10 This page intentionally left blank.[...]

F-1 3550-A2-GB20-10 February 1995 Equipment List Equipment Feature/Part No. G = Factory Install. F = Field Install. Comcode Model 3550 Standalone DSU With V .32 bis 14.4 kbps DBM With 2-port TDM/Flex Model 3551 Carrier-Mounted DSU (includes rear connector plate) Without Options With V .32 bis 14.4 kbps DBM 3550-A1-001 3550-A1-002 3550-A1-003 3551-B[...]

COMSPHERE 3550 Series Data Service Units F-2 February 1995 3550-A2-GB20-10 Equipment Comcode Feature/Part No. G = Factory Install. F = Field Install. Model 3550 Dial (PSTN) Network Interface Cables T elephone Cord 6-pin modular RJ1 1C/Permissive Plug T elephone Cord 8-pin Modular RJ45S/Programmable Plug 7 — 4400-F1-531 14 — 3600-F3-503 25 — 4[...]

Equipment List F-3 3550-A2-GB20-10 February 1995 Equipment* Part Number A T&T Paradyne Field Service Spares For Model 3550 DSU 2-Port TDM/Flex For Model 3551 DSU For Model 3550/3551 V .32 bis14.4 kbps DBM DBM Core Line-Interface 870-1858-8001 870-1871-8001 870-1859-8001 102-0144-0031 870-1571-8000 Rear Connector Plate – 25-Pin EIA-232/25-Pin [...]

COMSPHERE 3550 Series Data Service Units F-4 February 1995 3550-A2-GB20-10 Equipment * Part Number Model 3550 Digital (DDS) Network Interface Cable – RJ48S Network Cable (14 cord included with 3550) 8-pin to 6-pin Modular Cable (Model 3550 in Canada) 14 — 035-0267-1431 25 — 035-0267-2531 7 — 035-0279-0031 Model 3550 Dial (PSTN) Interface Ca[...]

Glossary-1 3550-A2-GB20-10 February 1995 Glossary active core The core that is transmitting data. For example, the DBM is the active core when the unit is in Backup mode. Advanced Diagnostic protocol (ADp) The network management protocol used by the COMSPHERE 6700 Series NMS. It provides diagnostic communication for the network. auto backup A funct[...]

COMSPHERE 3550 Series Data Service Units Glossary-2 February 1995 3550-A2-GB20-10 CCITT The International Consultative Committee for T elegraphy and T elephony , a committee of the International T elecommunication Union (ITU). clamping A function of the DSU that forces the output signal to go low (Off) and causes the DSU to ignore input signals. CM[...]

Glossary Glossary-3 3550-A2-GB20-10 February 1995 Device T est (Devic) A test that uses an internal test pattern generator built into the DSU to verify that the DSU (or DBM) is working properly . The generator sends a test message to the device’ s transmitter , where it is looped back to the device’ s receiver . The incoming message is then che[...]

COMSPHERE 3550 Series Data Service Units Glossary-4 February 1995 3550-A2-GB20-10 error ed second A performance measurement reported during Digital T est or T ransmit T est Pattern that is defined as a second in which at least one error has been detected. facility alarm A failure condition reported to the 6700 Series NMS when there is a break in co[...]

Glossary Glossary-5 3550-A2-GB20-10 February 1995 multipoint circuit A data network circuit that uses multipoint transmission and consists of one control with multiple tributaries. Network Management System (NMS) A set of diagnostic and configuration management tools for a data communication network, consisting of software programs and dedicated co[...]

COMSPHERE 3550 Series Data Service Units Glossary-6 February 1995 3550-A2-GB20-10 session disruptive Application data may be disrupted when running a test, or running the test may cause the application session to be dropped or terminated. The result depends upon the front-end processor , the time-out parameters, etc. session-nondisruptive diagnosti[...]

Index-1 3550-A2-GB20-10 February 1995 Index A Abort selective, 4-9 subnetwork, 4-9 Abort Call failure message, C-6 AC power , requirements, 1-4 Active message, DBM, C-3 Addr, 4-18 address, assigning, 4-18 addressing, tributary DSU, 2-9, 3-10 Aggreg Exceeded error message, C-1 1 Alarm, 4-6 All Async>Aggr error message, C-1 1 Alrm, status indicato[...]

COMSPHERE 3550 Series Data Service Units Index-2 February 1995 3550-A2-GB20-10 C cable crossover EIA-232-D, figure, D-8 V .35, figure, D-9 EIA-232, connecting Port 2, 2-1 1 V .35 connecting Port 2, 2-1 1 interconnect, 3-7, D-6 Call Aborted, DBM error message, C-10 Call Setup, 4-6, 5-14 Callback, 4-6 DBM message, C-8 Callback Fail, DBM error message[...]

Index Index-3 3550-A2-GB20-10 February 1995 D data rates DSU, 1-6 V .32 DBM, 1-7 DBM Aggreg Exceeded error message, C-1 1 Answering message, C-8 Busy error message, C-10 Call Aborted error message, C-10 Callback message, C-8 Callbck Fail error message, C-10 compatibility , 1-7 configuration options, 5-12 Conflict w/Envir error message, C-10 Connect[...]

COMSPHERE 3550 Series Data Service Units Index-4 February 1995 3550-A2-GB20-10 Dir Empty , DBM error message, C-10 directory dial backup, 4-17 entry , and password characters, 4-18 Disab message, C-7 Disabled DBM message, C-8 Displ, 4-1 1, 4-19, 4-20 displaying external leads, 4-19 DL, 4-10 DBM test, C-3 DSU test, C-4 port test, C-5 Drop:DTR Disc m[...]

Index Index-5 3550-A2-GB20-10 February 1995 F Fac Alarm, C-4 FacAlOnCMI, 5-21 faceplate, Model 361 1, 4-3 Facil message, C-7 Facility Alarm, C-2 Fail message, C-6 FCC, 1-4 feature number , F-1 features optional, 1-2 standard, 1-1 FP DBM test, initiator , C-3 DSU test, initiator , C-4 port test, initiator , C-5 frequency , 1-7 front panel DBM test, [...]

COMSPHERE 3550 Series Data Service Units Index-6 February 1995 3550-A2-GB20-10 L LADS, 1-1 connection, distances, table, 2-8 network, connection, 2-7, 3-9 operation, 1-1 LADS network connection, figure, 2-7 Lamp, 4-12 DBM test, C-3 message, C-3 DSU test, C-4 message, C-4 T est, 2-12, 3-12 LCD, 1-2 power–up, 2-5, 3-8 LDM, (see LADS), 1-1 leads ext[...]

Index Index-7 3550-A2-GB20-10 February 1995 N NetL, DSU test, C-4 network address, 4-18 addressing, link-level, 3-10 compatibility , DSU, 1-6 connection, 3-8 DDS, 3-9 dial, 3-8 NMS, 3-8 connections, 2-5 DDS (or LADS), 2-7 dial, 2-6 DSU test, initiator , C-4 interface DDS, 1-6 switched, 1-7 loopback, DSU test message, C-4 Next, 5-5 NMS compatibility[...]

COMSPHERE 3550 Series Data Service Units Index-8 February 1995 3550-A2-GB20-10 port asynchronous rates, TDM, 1-8 capacity , 1-3 DTE interface, TDM, 1-8 rates, 1-5 speed (DBM) configuration options, 5-28 (DSU) configuration options, 5-27 (external DBU) configuration options, 5-29 speeds, 1-3 synchronous rates, TDM, 1-8 test, BER T , C-5 Port Cntrl, [...]

Index Index-9 3550-A2-GB20-10 February 1995 shock, 1-4 signal level, 1-7 Single Rate, 5-13 single-port async/sync, 1-1 specifications, technical, 1-3 DSU, 1-6 general, 1-4 TDM/Flex, 1-8 V .32 DBM, 1-7 speed DBM, C-3 external DBU, C-3 speeds line, 1-3 port, 1-3 standard features, 1-1 Standby DBM message, C-3, C-8 mode, 4-7, 4-8 Starting Up DBM messa[...]

COMSPHERE 3550 Series Data Service Units Index-10 February 1995 3550-A2-GB20-10 U UL, 1-4 Undersp Required error message, C-13 Underspeed, 5-27, 5-28, 5-29 upgrades, 1-3 V V .13 Signl, 5-15 V .32 DBM, 1-2 technical specifications, 1-7 V .35 connector, pin assignments, D-7 crossover cable, figure, D-9 interconnect cable, 3-7 figure, D-6 V .54 Lpbk, [...]