ZyXEL Communications U-336S manual

U - 336S and U - 336SA User’s Manual Version 3.0 ZyXEL T OTAL I NTERNET A CCESS S OLUTION[...]

ii ZyXEL Limited Warranty ZyXEL warrants to the original end user (purchaser) that this product is free from any defects in materials or workmanship for a period of up to two (2) years from the date of purchase. During the warranty period, and upon proof of purchase, should the product have indications of failure due to faulty workmanship and/or ma[...]

iii desires some other return destination beyond the U.S. borders, the customer shall bear the cost of the return shipment. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Copyright © 1999 by ZyXEL The contents of this book may not be repr oduced (in any part or as a whole) or trans[...]

iv limits are designed to provide reasonable protection against harmful interference in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. If this equipment does cause harmful inte[...]

v company. The equipment must also be installed using an acceptable method of connection. In some cases, the company’s inside wiring associated with a single line individual service may be extended by means of a certified connector assembly. The customer should be aware that the compliance with the above conditions may not preve nt degradation of[...]

vi This product has been approved for connection to the Public Switched Telecommunication Network using interfaces compatible with ITU - TSS recommendation I.420 (Basic Rate ISDN user access). This product complies wi th the following directives: 1. The Council Directive 89/336/EEC of 3 May 1992 on the approximation of the laws of the member states[...]

vii • Sales inquiries : sales@zyxel.com in North America sales@zyxel.com.tw outside North America. • Technical support : support@zyxel.com in North America. support@zyxel.com.tw outside North Ame rica. • Product information : Visit our site on the World Wide Web: http://www.zyxel.com. • FTP : Information , such as ZyXEL software and ROM upd[...]

viii[...]

ix Contents ZyXEL Limited Warranty ii FCC Part 15 Information iii Information for Canadian Users iv Co ntacting ZyXEL vi 1 Introduction 1 Required Equipment 1 Modem Features 2 Standard Features 2 Intelligent F eatures 3 Fax Compatibility 4 Technical Specifications 4 2 Installation 7 Front Panel 7 Front Panel LEDs 8 Front Panel Switches 9 Rear Panel[...]

x Auto - Answer and Hook Controls 16 Quick Tips when issuing AT Commands 17 Modem Result Codes 19 Viewing S Register Values 19 Changing S Register Values 20 Non - Volatile Memory 20 Storing Phone Numbers 21 Dialing Stored Phone Numbers 21 Saving Settings and User Profiles 21 Helpful Hints for PC Computers 22 Default Modem Settings for PC ’ s 23 Z[...]

xi Dialing a Number 33 Manual Dial 34 Repeat Last Dial 35 Auto Answer 35 Dialing Messages 36 Panel Lock 41 V.25bis Command Set 42 Clock Options 43 RTS Options 44 Command State Options 44 Dialing from Synchronous Mode 44 Answering from Synchr onous Mode 45 Auto - Answer 45 Manual Answer 45 5 Leased Line Operation 46 Connecting to a Leased Line 46 Po[...]

xii Extended Distinctive Ring (EDR) 59 Setting Up EDR 60 EDR Application Example 61 7 Fax Operation 64 Fax Basics 64 Modem as Fax Machine 65 ITU - T T.30 Fax Protocol 65 Fax Command sets 66 Defining the Fax Command Sets 66 Class 1 Command Set 67 Class 2 Command Set 68 Class 2.0 Command Set 74 Extended Fax AT Command Set 81 Flow Control 85 Fax Recep[...]

xiii Connect Strings for Error Corrected Connecti ons 127 10 Diagnostics & Troubleshooting 128 Diagnostics 128 Power - On Self Test 128 Resetting The Modem 129 Loopback Tests 130 Indicator Lights 132 Line Condition Status Display 132 Trouble Shooting 135 AT Command Set Problems 135 Command Echo Problems 136 Answer Problems 137 Dialing Problems [...]

[...]

Introduction 1 1 Introduction Congratulations on the purchase of your U - 336S/SA modem - one of ZyXEL's premier high - performance products. The U - 336S and the U - 336SA modem are world renown for their ability to maintain ultra high speeds and clear, quality connections while communicating around the globe. Thi s User’s Guide describes t[...]

2 Introduction • One AC power adapter (external model) for U336S modem only. • Available AC wall outlet. • Telephone line from your te lephone company (dial - up or leased line). • Data and fax communication software. Modem Features No other 33.6 Kbps modem gives you so much for so little. Your modem is equipped with an array of standard an[...]

Introduction 3 • Exten ded AT command set with V.25bis . • Operates on 2 - wire dial - up or 2 - wire leased line. Intelligent Features • Automatic data and voice call detection allows you to use a single telephone line to handle both types of calls. • Asynchronous and synchr onous modes for reliable serial data communication. • Fast retr[...]

4 Introduction • ZyXEL exclusive Kernel Recovery Mode for no hassle recovery from failed flash uploads - no factory repairs. Fax Compati bility • EIA Class 1, 2, and 2.0 Fax commands. • ITU - T V.17 G3: up to 14,400bps. • ITU - T V.29 G3: up to 9,600bps. • ITU - T V.27ter G3: up to 4,800bps. • ZyXEL Fax AT commands . Technical Specifica[...]

Introduction 5 • Audio Monitor: programmable volume control.[...]

6 Introduction[...]

Installation 7 2 Installation This chapter describes the panel function and installation procedure for the U - 336S/SA. A shielded RS - 232 cable is required to ensure compliance with FCC Part 15, and it is the responsibility of the user to provide and use a s hielded RS - 232 cable. Make sure your installation site is clean and well ventilated. Th[...]

8 Installation Figure 2 - 2 U - 336SA Front Panel Front Panel LEDs PWR Power ON indicator, loghts up when your modem is turned ON. OH Off - Hook indicator, lights up when yo ur modem is in data mode or off - hook. It goes out when your modem is in talk mode or on - hook. AA Auto - Answer indicator, lights up when your modem is in the Auto Answer Mo[...]

Installation 9 CTS DTE mode: Clear To Send indicator; lights up when modem can accept data for transmission. It ind icates the signal status of RS232 signal CTS. Front Panel Switches The four arrow keys are for panel operations, allow intuitive menu tree operation and display modem status. Refer to Panel Operstion section in the Chapter LCD Panel O[...]

10 Installation Power switch, turns the modem ON or OFF. • POWER JACK Input terminal for power. Use the supplied AC adapter for U - 336S model. For U - 336SA model you can use your power cord to directly connect to the AC power outlet. • LINE Dial - up line RJ - 11 terminal jack, for connection to a 2 - wire dial - up or 2 - wire leased line. ?[...]

I nstallation 11 Figure 2 - 5 U - 336S Modem Connections For the U - 336SA you don’t need an AC adapter. Use the supplied power cord to connect yo ur modem to the AC power outlet. Figure 2 - 6 U - 336SA Modem Connections If a leased line is not used, simply leave the connection open. There are no DIP switches or configuration settings that you ne[...]

12 Installation conveniently stored in user selectable non - volatile memories and can be recalled as often as nee ded. Powering Up Once your modem’s power switch is turned ON, a series of diagnostic tests will be performed while a message is shown on the LCD panel. For a more detailed description of these diagnostic tests, please refer to Chapte[...]

Basic Modem Operation 13 3 Basic Modem Operation This chapter covers the basic commands and techniques involved in modem operation . In many cases, this is the onl y information you will need in order to get up and running with communication software, and to start making connections with your modem. Understanding AT Commands The U - 336S/SA communi[...]

14 Basic Modem Operation Using the Windows 95 Hyper Terminal Program In order to issue an AT command statement, you first need to run a communication program such as the Microsoft Windows “ Hyper Terminal ” program. This program provides a simple method to manually enter AT commands so you can do such things as “ customize ” the settings of[...]

Basic Modem Operation 15 You are now ready to start entering AT commands . In the terminal window, type: AT<Enter> Your modem responds OK This confirms that the modem and your computer are communicating correctly. To test the telephone line connection issue the manual answer command. Type: ATA<Enter> Your modem will pick up the phone li[...]

16 Basic Modem Operation Tone and Pulse Dialing: ATD P 555 1212 W T 24 Dialing Through a PBX: ATDT 9 W 555 1212 O N OTE : T HE 'W' IN THE DIAL STRING W ILL CAUSE THE MODEM TO WAIT FOR A SECOND DIAL TONE BEFORE IT CONTINUES TO DIAL . Pausing During Dialing: ATDT 9 ,, 555 1212 O N OTE : T HE PAUSE TIME FOR EA CH COMMA IS DEFINED BY S R EGIS[...]

Basic Modem Operation 17 Quick Tips when issuing AT Commands • The ENTER or RETURN key must be pressed to execute a command. • Multiple AT commands can be combined into one line. For example, AT&D2 and AT&N0 can be combined into one line AT&D2&N0. • Your modem processes commands from left to right. The AT command that appears [...]

18 Basic Modem O peration There are a few b asic commands that do not require the “ AT ” command prefix. These are as follows: Command Description A/ Repeats the last issued AT command once. A> Repeats the last issued AT command once, or re - dials the last dialed number up to 9 times until a key is p ressed or a connection is made. <any [...]

Basic Modem Operation 19 Modem Result Codes When you execute or try to execute an AT command, your modem sends a result code to let you know whether the command was executed. An O K result code means the AT command you sent was executed. If you receive an ERROR code, it means the command was invalid. The U - 336S/SA also provides result codes that [...]

20 Basic Modem Operation You can use the S r ? command to view the value of S - register ‘ r ’ . For example, to view the value of S - register S0, which controls auto - answering, type ATS0? and press Enter. The mod em responds with a three - digit character showing the value of this register, followed by OK. A value of 002, for example, means[...]

Basic Modem Operation 21 Storing Phone Numbers The AT command to store a phone number is in the format AT&Z s = n . The ‘ s ’ is a number from 0 to 49 that represents the location in memory that the phone number is to be stored, and the ‘ n ’ is the phone number itself. Example: To store the number ‘ 1 - 714 - 555 - 1212 ’ in memory[...]

22 Basic Modem Operation AT&V n Views the settings in profile ( n - 1 ); n =0 to 5; n =0 views current settings. AT&W n Stores the current settings in user profile ‘ n ’ ; n =0 to 3. ATZ n Resets the current settings with the settings in profile ‘ n ’ , n =0 to 4. Profiles 0 to 3 : User profiles. Profile 4 : Factory default profile.[...]

Basic Modem Operation 23 on your PC, be sure to enable the disk cache by including SMARTDRV execution in your AUTOEXEC batch file. Default Modem Settings for PC ’ s The U - 336S/SA factory settings are configured for operation with PC type computers and communication software. In most cases, no additional settings will be required. The followi ng[...]

24 Basic Modem Operation tasking systems. The serial por t has a 32 - byte transmission and a 32 - byte receival FIFO to increase communication program efficiency. Helpful Hints for Mac Computers Special AT Command Settings for Mac For operation with Mac computers, you may use the factory default settings with one exception. You must set the modem [...]

Basic Modem Operation 25 any program which runs on your Mac intosh. At the same time it allows automatic fax receiving. This program includes powerful line manager software which makes sure fax software does not interfere with other programs using the serial ports. If the mode m is turned off when you start your Mac intosh with the line manager act[...]

26 Basic Modem Operation Unix Software Tips In order to use your ZyXEL modem from a terminal or an X - Windows application, you need a program such as Minicom or Seyon. If you wish to make use of your ZyXEL modem's special features, special gettys such as mgetty or vgetty are needed. These programs are available from several ftp - sites. Some [...]

Basic Modem Operation 27[...]

28 LCD Panel Operation 4 LCD Panel Operation This chapter explains how to place and receive calls using the U - 336S/SA front panel. An introduction to the panel operation of your modem i s presented. Your modem comes with a menu driven 20 x 2 LCD display . All functions of the modem are displayed and selectable from this menu. Finally, this chapte[...]

LCD Panel Operation 29 computer/terminal or any key pad operation from the front panel. On the LCD screen, there are four on - screen buttons : D Dialing operat ion with submenus. R Redial last number. O Originate mode on - line. A Answer mode on - line. The cursor is blinking above one of these on - screen buttons, a dark rectangle which may be mo[...]

30 LCD Panel Operation menu selection and is used to access the previous menu. The up arrow key also serves as a quit command when you want to stop the current action. Down arrow key also called the ENTER key, is used solely to register the chosen selection and is very similar to the Carriage Return key or Enter key on a standard keyboard. Menu Tre[...]

LCD Panel Operation 31 Double Arrows on The Screen In some menu screens, you will see double left arrows (<<) or double right arrows (>>). This means there are more items on the left or right. Use the left o r right arrow key to select them. If you can only see a double right arrow, this indicates that the current item is the first item[...]

32 LCD Panel Operation Dial Memory The first menu in the dialing directory is DIAL MEMORY. Pressing the ENTER key will display the following screen: z #00:12345 <ENTER> Dial out the number << >> SELECT MEMORY Equivalent AT Commands: AT&Z? View all stored phone numbers. ATDSn n = 0 - 49; dial stored number. The first stored num[...]

LCD Panel Operation 33 Equivalent AT Commands: AT&Z? View all stored phone numbers. AT&Zn=1234567 Store phon e number in memory location n (n=0 - 49). Up to 50 different numbers can be viewed and set. If you want to add a number to the memory, select an unused memory location and press ENTER. The blinking cursor will change into an undersco[...]

34 LCD Panel Operation Equivalent AT Commands: ATD1234567 Dial phone number. Manual Dial Use of a telephone set to make a call, in which case an answer tone comes back, is normally called Manual Dial . Once the other side answers, access O (Originate) by using the left or right arrow key so the blinking cursor settles on the O. Then press the ENTER[...]

LCD Panel Operation 35 operation will reinitiate the modem handshaking a nd enable data communication. Equivalent AT Commands: +++ Escape sequence code; causes a modem to return to command state. Enter the escape sequence while in data state and wait for the modem to respond. ATH Go on - hook; disconnect the modem. ATD Go on - li ne in Originate mo[...]

36 LCD Panel Operation Dialing Messages Dialing will cause the following screen to be displayed on the LCD: DIALING ...................... 1234567 The dialed phone number will be displayed on the second line of the LCD screen. If the number e xceeds 20 digits, only the first 20 digits/characters will be displayed. If the modem's DIAL - UP LINE[...]

LCD Panel Operation 37 DISCONNECTING.......... 1234567 The modem will then return to the IDLE STATUS screen. If the first handshaking signal has been detected, the LCD screen will display: HANDSHAKING............ 1234567 If a connection has been made, the LCD will display the actual connected status. These are V.34 data state scre ens : V.34b 33600[...]

38 LCD Panel Operation On - line Status Screen 1 Status Display Unit/Meaning Link Option V34b V.34bis Line Speed 33600 bps/ TX/RX speed in V - 34 Error control V42b V.42bis/only display in Non - V.34 mode Line Type DL Dial - up Line Data Format AS Asynchronous Instant Transmission Through put 55820 bps/Blank in synchronous mode Instant Receiving Th[...]

LCD Panel Operation 39 Status Display Unit Link Layer Status V42b/SREJ Block Size 256 bits Blocks Retransmitted 0 blocks FCS (Frame Check Sum) Errors 0 bits On - line Status Screen 5 Status Display Unit Near End Echo - 22.3 dB Far End Echo - 57.2 dB Round Trip Delay 0 ms Echo Frequency Offset 0 Hz On - line Status Screen 6 Sta tus Display Unit Phas[...]

40 LCD Panel Operat ion Status Display Unit Transmitted Shaping MIN (MAX) Received Shaping MIN (MAX) Transmitted filter index 0~10 Received filter index 0~10 On - line Status Screen 9 Status Display Unit Transmitted Carrirr 1959 Hz Received Shaping 1959 Hz Transmitted Baud rate 3429 Baud Received Baud rate 3429 Baud On - line Status Screen 10 Statu[...]

LCD Panel Operation 41 Equivalent AT Commands: +++ Escape sequence code; causes a modem to return to command state. Enter the escape sequence while in data state and wait for the modem to respond. ATH Go on - hook(hang up); disconnect the modem. Pressing the up arrow key (MENU) or selecting NO will switch the screen back to the ON - LINE STATUS scr[...]

42 LCD Panel Operation of the non - FSK modes the modem is supplied with. Before synchronous transfers are started, some initial settings should be made. V.25bis Command Set To enable V.25bis commands use the AT*I1 command. For synchronous applications, the modem is permanently set in normal situations for use with one application. Save the desired[...]

LCD Panel Operation 43 Syntax Command with Parameters* Description AB Abort Call. NT Answer Tone is not detected. INC INC Incoming call. VAL VAL Valid. INV INV Invalid. LSN LSN n; <number> List of stored numbers. (Response to RLN) RST RST Changes to the asynchronous AT command mode. Clock Options Synchronous data must be transmitted and recei[...]

44 LCD Panel Operation cannot use adaptive rate. SLAVE AT&X2 Recovered receiver clock serves as transmission clock. RTS Options There are two RTS options . The choice depends on application and host/terminal requirements. In asynchronous mode RTS is used as a hardware flow control signal. IGNORED AT&R1 RT S is ignored; always assumed to be [...]

LCD Panel Operation 45 Once the modem is connected, the modem will enter synchronous operation. 2. Dial through the computer using V.25bis commands : Some communication software packages on synchronous computers can dial using V.25bis sync hronous commands. In this case, set &M3 and *I1 and the modem will accept V.25bis commands and make a sync[...]

46 Leased Line Operation 5 Leased Line Operation A leased line is a permanent telephone line connection between two fixed points. It can be dedicated copper wires or a leased telephone circuit from the telephone company. Four - wire leased lines use one pair of wires to transmit data and a second pair to receive. Two - wi re leased lines transmit a[...]

Leased Line Operation 47 modem can be commanded to either answer the call immediately, or after a specified number of rings. In a leased - line connection, the communication circuit between two modems is always present. Dialing and waiting for rings does not occur in this situation. If these two modems want to establish a data link, one must be des[...]

48 Leased Line Operation Terminating a Leased Line Connection A leased line can be terminated two ways: • Going on - line manually. • Turning the power OFF and ON. If you have set the leased line as the power - on default, the modem will try the leased line again.[...]

Leased Line Operation 49[...]

50 Special Functions 6 Special Functions This chapter describes special features of the U - 336S/SA, and offers instructions on how each is used. Security Functions Your modem provides a security function that prevents unauthorized users from making connections. Two types of security functions are provided. • Type 1 security is used when the remo[...]

Special Functions 51 • With level 2 security , dial back the phone num ber corresponding to the dial - in password. The line simply disconnects if the password does not match. User Passwords Fifty user passwords may be defined. The corresponding 50 dial - back numbers are the modem ’ s 50 stored phone numbers. Any character (ASCII 0 - 127) can [...]

52 Special Functions ******** OK The command AT*Hn will modify the nth user password. You will be prompted to enter the supervisor password first and then be prompted to enter t he nth user password. Levels of security : Command Function *G0 Disable security function. *G1 Enable type 1 and level 1 security , with password check. *G2 Enable type 1 a[...]

Special Functions 53 Remote Configuration Remote configuration on the U - 336S/SA is pr ovided as a profile by profile batch mode. When on - line, the remote modem ’ s current configuration or one of its profiles can be read into one of the local modem ’ s user profiles. This profile is modified locally and the line can be disconnected during t[...]

54 Special Functions The remote profile read and write commands - *Rab and *Wab - only work in the on - line condition. The connection speed and mode do not matter. The remote modem must be set to accept remote configuration by executing t he AT*F1 command. The AT*F0 command will set the modem up to deny remote configuration requests. Because the m[...]

Special Functions 55 There are two kinds of caller information message formats sent by the phone company. • One is the single message format which includes date, time, and caller ID • The other is the multiple message format which also include s the caller name as registered with the phone company. The command ATS40.2= n is used to enable ( n=1[...]

56 Special Functions CALLER NUMBER: 7135551414 or CALLER NAME: Brent Harper RING In the multiple message format, if the caller ’ s number and name are available, the ring message will display both: RING TIME: MM-DD hh:mm CALLER NUMBER: <Caller_ID> CALLER NAME: <Caller_Name> RING Here is an example: RING TIME: 04-28 12:30 CALLER NUMBER[...]

Special Functions 57 Setting S48.0=1 will cause the modem to report CND information in its ASCII coded hexadecimal raw data format. The DTE software is responsible for explaining the data. O N OTE : P LEASE RE FER TO THE B ELLCORE T ECHNICAL A DVISORY DOCUMENT TR - NWT - 000030 FOR THE EXACT DATA F ORMAT . T HE ABOVE C ALLER ID SCHEME APPLIES TO TH[...]

58 Special Functions part (cadence) of the ring. Your modem can distinguish up to four types of ring signals and can be commanded to answer or not answer any one of these four types of ring sign als. Following is a list of these four types of ring signals. These are the ring types used in the USA. The difference among the ring types is the two - se[...]

Special Functions 59 Extended Distinctive Ring (EDR) Extended Distinctive Ring (EDR) is a specia l feature designed for single telephone line home use to receive fax or data calls without interfering with regular voice calls. When most users install a fax/modem at home, they won ’ t subscribe to an extra telephone line for occasional fax or data [...]

60 Special Functions report RING to the software immediately. The software applic ation can then issue commands to answer the call and receive the fax. If the remote caller is using a fax phone which does not send out a CNG tone and is waiting for a fax answer tone in order to press the START button, the caller can press a designated DT MF tone, wh[...]

Special Functions 61 Bits Bi n. Dec. Description 11 3 Report RING six times. EDR detection (either CNG or DTMF tones) will be disabled once detection occurs. However, a customer ’ s program might not answer because the setting of the software may require multiple rings to answer. S51 bits 0 - 1 control the number of rings that the modem will repo[...]

62 Special Functions 2. Set S51.0=1 to enable EDR and report RING twice. The modem will not report a normal RING and ZFAX will no t answer a call unless EDR RING is reported. 3. Set S51.4=1 to enable fax CNG tone detection. It is reported as RING. 4. Set S51.2=1 to enable DTMF tone detection. It is reported as RING. If the remote fax machine does n[...]

Special Functions 63[...]

64 Fax Operation 7 Fax Operation The U - 336S/SA can be used as a fax machine. In the sections below, we will describe how the modem works as a fax machine, the ITU - T T.30 fax protocol, the Class 1,2, and 2.0 fax commands and ZyXEL extended fax AT commands . Also covered are the status report result codes , the flow control protocol associated wi[...]

Fax Operation 65 machine or such business, or entity, or individual. In order to program this information into the fax function of your modem, please refer to the documentation of the fax software you will be using. Modem as Fax Mac hine Modems can also be designed to include a fax transmitting and receiving function similar to a fax card. Since th[...]

66 Fax Operation You modem allows for fax speeds up to 14400 bps when transmitting to a fax machine which complies with the V.17 fax standard. Speeds will fall back to 12000, 9600, or 7200 bps in poor line conditions. When connecting to a G3 fax device, your modem allows for fax speeds up to 9600 bps and will automatically fall back to 7200, 4800, [...]

Fax Operation 67 Several revisions of the class 2 standard exist. Implementations conforming to different revisions may not work together. A formally approved version is the Class 2.0 command set, also called the TIA - 592 standard. Class 1 Command Set Command Value Description +FCLASS=n Service class selection n=0 Set to Data mode n=1 Set to Class[...]

68 Fax Operation Value Modulation Speed Requirements 3 V.21 ch. 2 300 required for FTH & FRH +FTH and +FRH support value 3 (V.21 ch. 2 / 300 bps) only. 24 V.27ter 2400 required for FTM & FRM 48 V.27ter 4800 required for F TM & FRM 72 V.29 7200 required for FTM & FRM 73 V.17 7200 required for FTM & FRM 74 V.17 w/st 7200 required [...]

Fax Operation 69 Command Value Description +FBADLIN= <value> 0 - 255 Bad line threshold (number of consecutive bad lines for a bad page parameter): Determine if Copy Qua lity OK on the T.30 flow chart . <value>=0 to 255; a value of 0 implies that error checking is disabled. +FBOR= n Phase C data bit order: n=0 Select direct bit order. n[...]

70 Fax Operation Command Value Description vr=1 Vertical resolution: Fine; 196 lpi. br=0 Bit rate: 2400 bit/s; V.27ter. br=1 Bit rate: 4800 bit/s; V.27ter. br=2 Bit rate: 7200 bit/s; V.29 or V.17. br=3 Bit rate: 9600 bit/s; V.29 or V.17. br=4 Bit rate: 12000 bit/s; V.17. br=5 Bit rate: 14400 bit/s; V.17. wd=0 Page width: 1728 pixels in 215mm. wd=1 [...]

Fax Operation 71 Command Value Description +FDCS= vr,br,wd ,ln,df,ec,bf,st Current session parameter; refer to +FDCC command. +FDIS= vr,br,wd,l n,df,ec,bf,st Current session negotiation parameter; refer to +FDCC command. +FDR Receive phase C data command; initiates document reception. +FDT= df,vr,wd, ln Transmit phase C data command: release the DC[...]

72 Fax Operation Command Value Description +FMFR? Request DCE manufacturer . +FMINSP= n Minimum phase C speed parameter: n=0 2400 bps. n=1 4800 bps. n=2 7200 bps. n=3 9600 bps. n=4 12000 bps. n=5 14400 bps. +FPHCTO= <value> 0 - 255 DTE Phas e C response time - out: Determine how long the DCE will wait for a command after reaching the end of d[...]

Fax Operation 73 Command Value Description n=1 Enable polli ng. All other +F commands are not supported, but the modem will respond OK. In many cases this means "don't care." See PN 2388 for command details. Class 2 Command Responses Response Value Function and Description +FCFR Confirmation . +FCIG:"string" R eport remote [...]

74 Fax Operation Response Value Function and Description +FNSF:"HEX string" Report the non - standard fa cilities frame response. +FNSS:"HEX string" Report the non - standard setup frame response. +FPOLL Remote polling indication. +FPTS:n Receive page transfer status response; refer to +FPTS=n command. +FTSI:"string" R[...]

Fax Operation 75 Command Value Des cription mode for pha se C data. +FBS? Buffer size parameter; read only. +FCC= vr,br,wd ,ln,df,ec,bf,st DCE capability parameter . Refer to +FDCC command in Class 2 for parameter settings. +FCLASS= n Service class selection. Refer to +FCLASS Class 1 command in previous sectio n. +FCO DCE response fax connection ma[...]

76 Fax Operation Command Value Des cription document reception +FDT Transmit phase C data command: releases the DCE to proceed with negotiation +FEA= n Phase C received EOL alignment parameter n=0 Determine that T.4 EOL patterns are bit aligned (as received). n=1 Determine that the last received bits of T.4 EOL patterns are byte aligned by the DCE,[...]

Fax Operation 77 Command Value Des cription +FMI? Request DCE manufacturer identification. +FMM? Request DCE model identification. +FMR? Request DCE revision identification. +FMS= n Minimum phase C speed parameter. refer to +FMINSP Class 2 command in previos section for parameter settings. +FNR= rpr,tpr, idr, nsr Negotiation message reporting contr[...]

78 Fax Operation Command Value Des cription +FNS= "string" Non - standard byte string parameter. "string": string of hexadecimal coded octets. +FPI= "string" Local fax s tation ID string, for polling Rx. +FPR= n Serial port rate control parameter: n=0 Automatic DTE rate detection by the DCE. n>0 Serial rate is fixed[...]

Fax Operation 79 Command Value Des cription n=0 Disable polling. n=1 Enable polling. Class 2.0 Command Responses Response Value Function and Description +FCI:"CSI ID string" Report remote ID response, Called Station ID +FCO Fax connection established response. + FCS: vr,br,wd,ln ,df,ec,bf,st negotiated session parameters (DCS frame inform[...]

80 Fax Operation Response Value Function and Description hsc= 70 - 8F Receive phase B hang up codes. Refer to TIA - 592 for details. hsc= 90 - 9F Receive phase C hang up codes. Refer to TIA - 592 for details. hsc= A0 - BF Receive phase D hang up codes. Refer to TIA - 592 for details. +FIS: vr,br,wd,ln, df,ec,bf,st Remote fax station capabilities (D[...]

Fax Operation 81 Response Value Function and Description buffer overflow and report them: lc: line count blc: bad line co unt cblc: maximum consecutive bad line count lbc: lost byte count +FTC: vr,br,wd,ln ,df,ec,bf,st Remote fax station capabilities (DCT frame information) response refer to +FIS=... command for the description of sub - parameters.[...]

82 Fax Operation Mode Setting Command Function #F Set the modem into V17G3 FAX mode same function as the extended AT command AT&N32. #B0 Set fax receiving mode. The connection parameters and received fax data are sent to DTE continuously followi ng the connect message. (Default) #B1 Set fax receiving mode. The messages are separated from the re[...]

Fax Operation 83 Command Function #T1 Set to two dimensional coding scheme. #R0 Set recording width: 1728 picture elements along a scan line length of 215 mm. #R1 Set recording width: 2048 picture elements along a scan line le ngth of 255 mm. #R2 Set recording width: 2432 picture elements along a scan line length of 303 mm. #L0 Set maximum recordin[...]

84 Fax Operation Status Report Resul t Codes When the U - 336S/SA is in fax mode, each ATD or ATA command will make the modem try to establish a fax connection. Your modem will send a status report result code back to the DTE (computer). NO DIAL TONE Tried to dial but no dial tone is detected. NO CARRIER Handshake fails or no carrier is detected or[...]

Fax Operation 85 After each fax disconnection, the following result code is sent back to the DTE: DISCONNECTnP<string> This result code informs DTE of the disconnecting status. Field Description DISCONNECT0 Disconnect with remote confirmation . DISCONNECT1 Disconnect without remote confirmation. P<string> Remote fax number. The basic AT[...]

86 Fax Operation automatically, handshakes the multi - page procedure with the remote facsimile and sends the next page. The following flow control signaling is used while receiving a fax: • CTS is not used when receiving fax. • RTS is used to inform your modem that the computer cannot accept data at this moment. The modem will not pass receive[...]

Fax Operation 87 • Add these commands to the init string: X7#B1+FCLASS=6 • Change the connection message to: 300 CONNECT 4800 CONNECT 4800 1200 CONNECT 1200 9600 CONNECT 7200 1275 CONNECT FAX 19200 CONNECT 9600 2400 C ONNECT 2400 38400 CONNECT 14400 • Set external mail as: String Error Level 1 ZyXEL 100 2 3 The following is a sample setting i[...]

88 AT Command Set Summaries 8 AT Command Set Summa ries Basic AT Command Set Command Options Function & Description Ref. A/ Re - execute the last command once. A> Re - execute the last command once or repeat the last call up to 9 times. (See also S8) <any key> Terminate current connection attempt when enter in handshaking state. +++ Es[...]

AT Command Set Summaries 89 Command Options Function & Description Ref. 0 - 9, #, * Digits for dialing P Pulse dialing S23.1 T Ton dialing S23.1 , Pause for a time specified in S8. Remaining digits will be dialed as in - band DTMF. ; Return to command state after dialing ! Hook flash @ Wait for a 5 second silence b efore proceeding R Reverse ha[...]

90 AT Command Set Summaries Command Options Function & Description Ref. I1 Display product information and ROM checksum I2 Display modem link status report I12 Display physical layer status L n n=0 - 7 4 * Speaker volume control. The higher the value, the higher the volume S24.5 - 7 M n Speaker control S21.1 - 2 M0 Speaker always OFF M1 * Speak[...]

AT Command Set Summaries 91 Command Options Function & Description Ref. T Ton dial S23.1 UPX Down load firmware to the Flash EPROM by using Xmodem protocol V n Sets display type for Result Codes S23.6 V0 Display result code in numeric form. (See also S35.7 and the result code table of 'ATXn') V1 * Display result code in ver bose form.[...]

92 AT Command Set Summar ies Blocks Resent 0 Max Outstanding 0 Max Block Size 0 Retrains Requested 0 Link Duration 0 Retrains Granted 0 FRN Requested 0 FRN Granted 0 FCS Errors 0 Round Trip Delay 0 Xmitter Underrun 0 Receiver Overrun 0 Last Speed/Protocol 33600 Disconnect Reason Local hang up Data Type Description Chars Data received from or sent t[...]

AT Command Set Summaries 93 Output Parameter Output Value Description Blocks Resent Number of blocks resent due to remote modem request. (If there were many blocks resent, you may have experienced line trouble or protocol incompatibility.) Max Outstanding Maximum blocks received without ackno wledgment by remote modem. Max Block Size Maximum octets[...]

94 AT Command Set Summaries Output Parameter Output Value Description Break Time - out DTR Dropped Carrier Lost 1 (No handshaking response) Security check ATH command D/V hang up Carrier Lost 2 (Remote hang - up, busy tone) Keyboard Abort Inactivity Extended AT& Comma nd Set Command Options Function & Description Ref. &Bn Data rate, ter[...]

AT Command Set Summaries 95 Command Options Function & Description Ref. &D3 Same as &D2 but DTR OFF causes the modem to hang up and reset from profile 0. &F Load factor y settings to RAM as active configuration. &Gn Guard tone options S28.4 - 5 &G0 * No guard tone (within USA, Canada). &G2 1800 Hz guard tone. &Hn Dat[...]

96 AT Command Set Summaries Command Options Function & Description Ref. selection &M0 * Asynchronous mode with data buffering &M1 Asynchronous command, synchronous data &M2 Direct asynchronous mode, no data buffering &M3 Synchronous mode &Nn Modem link mode options (DCE/DCE). (See also S43.7, S48.1 ) S19 &N0 * Multi - Au[...]

AT Command Set Summaries 97 Command Options Function & Description Ref. leased lines only) &N9 V.27bis 4800 (models with 4 - wire leased lines only) &N10 V.27bis 2400 (models with 4 - wire leased lines only) &N11 V.26bis 2400 (models with 4 - wire leased lines only) &N12 V.23 1200/75 (See also S48b3, S52b7) &N13 V.23 600/75 [...]

98 AT Command Set Summaries Command Options Function & Description Ref. &N44 CELL 9600 &N45 CELL 7200 &N46 CELL 4800T &N60 V.34 33600 &N61 V.34 31200 &N62 V.34 28800 &N63 V.34 26400 &N64 V.34 24000 &N65 V.34 21600 &N66 V.34 19200 &N67 V.34 16800 &N68 V.34 144 00 &N69 V.34 12000 &N70 V.34 9[...]

AT Comm and Set Summaries 99 Command Options Function & Description Ref. TSS). (See also S41.5, S44.4) &Tn Modem testing. S16 &T0 Terminate test in progress. &T1 Initiate Analog Loop - back (ALB) test. &T3 Initiate Local Digital Loop - back (LDL) test &T4 Grant Remote Digital Loop - back request from remote modem S14.1 &[...]

100 AT Command Set Summaries Command Options Function & Description Ref. &X1 Terminal provides synchronous transmit clock signal (External clock from pin 24 of EIA - 232D) &X2 Received carrier provides synchronous trans mit clock signal (Remote or Slave clock to pin 15 of EIA - 232D) &Yn Break handling. Destructive Break clears the [...]

AT Command Set Summaries 101 Command Options Function & Description Ref. directory location n. *D0 * (See also S35.4 and S38.0) *En Modem error control negotiation. S21.0 *E0 * if error control negotiation fails, keep the non - error control connection. *E1 If error control negotiation fails, disconnect the call (hang - up). *Fn Remote configur[...]

102 AT Command Set Summaries Command Options Function & Description Ref. *In Command set selection S17.6 - 7 *I0 * AT command set *I1 V.25bis command set *I2 Dumb mode *Mn Leased line auto - handshake mode selection S14.0 *M0 Set to Originate mode *M1 Set to Answer mode *Pn n=0 - 15 *P9 * Set leased line transmission power level; ranges from 0 [...]

AT Command Set Summaries 103 Command Options Function & Description Ref. *V View the Password table *Wab Write local configuration profile “a” to remote user profil e “b” and reset remote modem from profile “b” S36.1 a=0 - 3 Local user profile number “a” S37.4 - 7 a=4 Local active configuration a=5 Local factory default configur[...]

104 AT Command Set Summaries[...]

Sta tus Registers & Result Codes 105 9 Status Registers & Result Codes S - Register Descriptions In most bit - mapped S - register s, the default bit value is 0. Non - 0 default values are fol lowed by an asterisk. In some cases, default values are shown in the reference column preceded by +. Some bits are reserved for factory use and shoul[...]

106 Status Registers & Result Codes Command Function & Description +Ref. register also sets the time - out interval for the “W” dial modifier to wait for the dial tone. (See also S41b4) S7= Set duration, in number of seconds mode m waits for a carrier +060 S8= Set duration, in seconds, for pause (,) option in Dial command and pause betw[...]

Status Registers & Result Codes 107 C ommand bit dec hex Function and description Ref. 1 0 0 Grant Remote Digital Loop - back test request &T4 2 2 Deny Remote Digital Loop - bac k test &T5 3,2 0 0 Dial - up line (Default) &L0 4 4 2 - wire leased line &L1 8 8 4 - wire leased line &L2 5,4 0 0 Internal clock (Default) &X0 1[...]

108 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. power on 64 40 Profile 2 as active settings after power on Z2 96 60 Profile 3 as active settings after power on Z3 128 80 * Factory default as active settings after power on Z4 S16= dec hex Test status register +000 0 0 No test in progress &T0 1 1 Loop - [...]

Status Registers & Result Codes 109 C ommand bit dec hex Function and description Ref. accepted) S18= dec hex Force modem to fix baud rate when answering +000 0 * 0 Disable fixed baud function 1 - 46 1 - 2E Enable baud rate to be fixed when answering. Baud rate value settings (n) the same as S20 S19= dec hex Modem connection mode, same +000/ &a[...]

110 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. 17 11 153600 bps 18 12 102400 bps 20 14 61440 bps 21 15 51200 bps 22 16 624000 bps 24 18 124800 bps 25 19 6 2400 bps 26 1A 41600 bps 27 1B 31200 bps 28 1C 24960 bps 29 1D 20800 bps 46 2E 921600 bps Note: Only the speeds up to S20=15 are supported by auto spee[...]

Status Registers & Result Codes 111 C ommand bit dec hex Function and description Ref. 16 10 CD tracks presence of data carrier (see also S38.3) &C1 5 0 0 CTS Follows R TS in synchronous mode. Response delay set in S26 &R0 32 20 Ignore RTS (CTS always ON) in synchronous mode. (Default) &D2 6 - 7 0 0 Assume DTR always On &D0 64 4[...]

112 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. 24 18 ATX3 X3 32 20 ATX4 X4 40 28 ATX5, error control result code enabled (Default) X5 48 30 ATX6, error control result code enabled X6 56 38 ATX7, error cont rol result code enabled X7 6 0 0 Display result code in numeric format (see S35.7) V0 64 40 Display [...]

Status Registers & Result Codes 113 C ommand bit dec hex Function and description Ref. comman d) S27= bit dec hex Bit mapped register 0 - 2 Modem error control 0 0 No error control &K0 1 1 MNP4 + MNP3 (see also S41.0) &K1 2 2 MNP4 + MNP5 (see also S38.5, S41.0) &K2 3 3 V.42+MNP4 &K3 4 4 V.42 + V.42bis (compatible with &K2) &[...]

114 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. 1 1 Multiple phone/modem line, RJ12/RJ13 phone jack &J1 1 0 0 Panel key is normal (default) &Y0 1 2 Panel key is locked &Y1 2 - 3 0 0 Destructive, expedited break &Y2 1 4 Non - destructive, expedited break (default) 10 8 Non - destr uctive, un[...]

Status Registers & Result Codes 115 C ommand bit dec hex Function and description Ref. 0 1 1 Use CELL 4800T trells coded 4800 for V.32 4800 (available with cellular mode only) 1 2 2 Disable ab orting from terminal during modem handshaking 2 4 4 V.26 alternative A. (see also ‘&N11’) 3 8 8 Add 12 dBm attenuation to the leased line transmi[...]

116 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. 1 1 Grant remote request for configuration *F1 1 0 0 Write from local profile a to remote profile b *Wab 2 2 Read from remote profile b to local profile a *Rab 7 - 5 Security function control 0 0 Disable security function (Default) *G0 32 20 Enable type 1 sec[...]

Status Registers & Result Codes 117 C ommand bit dec hex Function and description Ref. number S29 3 8 8 DCD ON/OFF sequence follows UNIX standard, DCD high before connect message is sent, DCD off after last DCE response is sent &C1 S21.4 4 16 10 Auto - mode fax receiving disabled &N0 5 32 20 Disable MNP5 &Kn S39= bit dec hex Bit map[...]

118 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. 6 64 Enables type 4 ring detection S41= bit dec hex Bi t mapped register +000 0 1 1 Special MNP compatibility (see also S27.0, S38.5) &Kn 2 4 4 Disable retrain abort, up to 5 min. for special satellite line condition S27.6 *n 3 8 8 Enable CCITT signals 14[...]

Status Register s & Result Codes 119 C ommand bit dec hex Function and description Ref. 0.5 seconds at carrier loss S43= bit dec hex Bit mapped register +000 0 1 1 Disable ZyXEL 16800 in Multi - Aut o mode &N0 1 2 2 Disable ZyXEL 19200 in Multi - Auto mode &N0 2 4 4 Disable cellular mode automatic transmit power adjustment (see also S49[...]

120 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. speed fixed at 9600 if link speed is 7200, DTE speed follows link speed. When selected with &B1, DTE speed fixed at current rate when an ARQ connection is made, when a non - ARQ connection is made, DTE speed follows the link speed. (Se e also S18) 7 128 8[...]

Status Registers & Result Codes 121 C ommand bit dec hex Function and description Ref. times out. 2 4 4 Enable data calling tone (CNG) sending 3 8 8 Reverse the V.23 channel speed. Originate mode modem speed (Send/Receive) 1200/75; Answer mode modem speed (Send/Receive) 75/1200 &N12 4 16 10 (Work with &D1 command) DTR ON will have the m[...]

122 Status Registers & Result Codes C ommand bit dec hex Function and description Ref. reaches the preset value. Set value ‘0’ to disable this function. S51= bit dec hex Bit - mapped register 1 - 0 0 0 Disables EDR 1 1 Reports RING twice 2 2 Reports RING four times 3 3 Reports RING six times 3 - 2 0 0 Disables DTMF tone 4 4 Reports RING for[...]

Status Registers & Result Codes 123 C ommand bit dec hex Function and description Ref. 0 0 - 43 dBm (Default) 8 8 - 33 dBm 16 10 - 26 dBm 24 18 - 26 dBm 7 0 0 Select ‘Mark’ as the first signal of the V.23 handshaking sequence (Default) &N12 128 80 Select ‘Space’ as the first signal of the V.23 handshaking sequence &N12 S56= dec [...]

124 Status Registers & Result Codes Bit S - register bit number, 'b', used in 'ATSr.b=n' and 'ATSr.b=?' dec Decimal value, 'x', used in 'ATSn=x' hex Equivalent Hexadecimal value. +nnn Factory default when listed in 'Reference' column. Note: 'AT' is omitted when an AT command [...]

Status Registers & Result Codes 125 ATV0 ATV1 X0 X1 X2 X3 X4 X5 X6 X7 16 CONNECT 12000 % % % % @ $ # 17 CONNECT 14400 % % % % @ $ # 18 CONNECT 16800 % % % % @ $ # 19 CONNECT 38400 % % % % @ 20 CONNECT 57600 % % % % @ 21 CONNECT 76800 % % % % @ 22 CONNECT 115200 % % % % @ 23 CONNECT 230400 % % % % @ 24 CONNECT 460800 % % % % @ 25 CONNECT 921600 [...]

126 Status Registers & Result Codes ** When more than one type of Distinctive Ring is turned on (S40b3 - 6) ‘RING n’ will be reported, n=Ring Type # (1 - 4) Result Code Chart Sy mbol Reference: V Supported % Reports the DTE Speed as: <cr><lf>CONNECT DTE_Speed<cr><lf> @ CONNECT DTE_Speed/Protocol DCE_Speed/Error_Contr[...]

Status Registers & Result Codes 127 Connect Strings for Er ror Corrected Connections To enable the following numerical (ATV0) and verbose (ATV1) result codes when an error corrected connection is made, set S35 bit 7 to 1.( ATS35.7=1 ) Numerical V0 Verbose V1 Numerical V0 Verbose V1 50 CONNECT 58 CONNECT 16800 51 CONNECT 1200 59 CONNECT 19200 52[...]

128 Diagnostics & Troubl eshooting 10 Diagnostics & Troubleshooting Diagnostics The U - 336S/SA is equipped with several diagnostic capabilities: • Power - on Self Test. • Analog Loop - back Test. • Analog Loop - back with Self - Test. • Local Digital Loop - back Test. • Remote Digital Loop - back Test. • Rem ote Digital Loop - [...]

Diagnostics & Troubleshooting 129 code checksum, DSP RAM memory, EEPROM, digital circuits, and the analog circuit calibrations. Results of the power - on self - test displayed on your terminal: 0 SYSTEM TESTING .... Self - test indicator. If no error occurs, this message will las t until the end of the test. 1 ROM TEST FIAL.... ROM code checksu[...]

130 Diagnostics & Troubleshooting temporary power - on reset problem and will not affect modem operation. Loopback Tests The Analog Loopback Test, Local Digital Loopback Test, Remote Digital Loopback Test can all be ini tiated with AT commands from the terminal. Use the AT&T0 command to terminate the test. Analog Loopback (AT&T1) This t[...]

Diagnostics & Troubleshooting 131 Local Digit al Loopback Test (AT&T3) This test will loopback the digital form data demodulated from the receiver to the input of the transmitter. During testing, all data received from the remote modem will be returned to the remote modem. This test is applicable when the remote modem does not provide V.54 [...]

132 Diagnostics & Troubleshooting Indicator Lights Retransmission Indicator In the error control mode, an error occurring in the link will cause the data to be re - transmitted. At the same time, the AA LED will flash. This also indicates the quality of the line. Dialing Indicator The V34 LED will flash on and off for 1/2 second each to indicat[...]

Diagnostics & Troubleshooting 133 measuring the distance between the demodulated signal point and the ideal signal point. For V .32/V.32bis, the modem - measured S/N ratio is generally about 2 dB higher than what is actually on the line because the modem rejects some of the out - of - band noise. For V.22/22bis, the difference can be as high as[...]

134 Diagnostics & Troubleshooting Retrain Granted (RTG) The count of the granting of the remote modem's retrain requests. Each request is an indicator of bad receiving conditions. Retrain Req uested (RTR) The count of the local modem's requests for the remote modem to retrain when the signal quality is poor. Round Trip Echo Delay (RTD[...]

Diagnostics & Troubleshooting 135 Trouble Shooting Your modem is designed to provide years of ultra high speed satisfaction. In the unlikel y event you encounter problems using your modem, the tips in this section will help you to identify and resolve them. Most modem problems are a result of incorrect cabling or settings within your communicat[...]

136 Diagnostics & Troubleshooting 3. You may have typed the commands when your modem was in data state instead of the command state. To switch from data state to command state, type the escape sequence code +++. To retu rn to the data state, type ATO and press Enter. Problem You typed an AT command, but did not receive an OK or 0 result code. S[...]

Diagnostics & Troubleshooting 137 Solutions 1. Make sure the DTR LED is ON. If it is OFF, make sure your communications software is u sing the same COM port as your modem. 2. Neither your modem nor your communications software is configured to echo characters. Use the E1 command to enable modem echo , or turn on your software program ’ s Echo[...]

138 Diagnostics & Troubles hooting 3. Check that the DTR LED is ON, and that the AA LED flickers with e ach incoming ring. If the LEDs do not respond in this way, refer to your ZyXEL Modem Reference Manual. 4. Set &D φ and auto answer, if your modem is not connected to RS232 or DTR is not ready. Problem When you receive a phone call, your [...]

Diagnostics & Troubleshooting 139 Solutions 1. Your modem and communications software may b e configured for different flow control methods. Be sure your modem and software are both using hardware (RTS/CTS) flow control or software (XON/XOFF) flow control. 2. To verify that your modem and communications software are using the same flow control [...]

140 Upgrading Your Modem 11 Upgrading Your Modem Upgradi ng by Flash EPROM 1. Obtain the new firmware by downloading from the ZyXEL BBS, WWW or FTP site. See Contacting ZyXEL on page vi for the FTP addre ss. 2. Turn on your computer. 3. Turn on your modem. 4. Start any communications program that supports the XModem protocol. 5. Type ATUPX . 6. Pre[...]

Upgrading Your Modem 141 Kernel Recovery Mode Your modem is equipped with ZyXEL ’ s exclusive Kernel Recovery Mode. This unique fe ature enables quick recovery from failed flash uploads. With other modems, a failed flash upload usually results in the user having to return the modem to the factory for repair. In the unlikely event that your modem [...]

142 Connector Pinouts 12 Connector Pinouts Phone Jack Pinouts The ZyXEL U - 336S/SA modem features two RJ - 11 phone jacks, one for 2 - wire dial - up and 2 - wire leased line connection (LINE) and one for an optional connection to a telephone set (PHONE). The signals on these pins are: 1 A 2 RING 3 TIP 4 A1 PC Serial Port Pinouts Signal Pin ITU - [...]

Connector Pinouts 143 Signal Pin ITU - TSS Signal Name EIA Signal Name Pin/Signal Description Direction DTE - DCE (CTS). 6 107 CC Data Set Ready (DSR). ← 7 102 AB Signal Ground (GND). 8 109 CF Data Carrier Detected (DCD). ← 15 114 DB Transmit Clock Signal (source: DCE). ← 17 115 DD Synchronous Receive Clock. ← 18 141 Local Analog Loopback T[...]

144 Connector Pinouts Macint osh Serial Port Pinouts The following table shows the wiring of a modem Mac intosh hardware handshaking cable: Mac Din 8 Modem DB 25 Description 1 4 & 20 DTR to R TS and DTR, Hardware Handshaking Out 2 5 CTS to CTS, Hardware Handshaking In 3 2 TX - to TXD, Data sent 4 7 GND, Ground 5 3 RX - to RXD, Data received 6 -[...]

Connector Pinouts 145[...]

146 Index 13 Index AT commands, 4, 13, 14, 15, 16, 18, 20, 27, 43, 50, 63, 80, 84, 127, 131, 132, 138 Combining, 16 Quick Tips, 16 ATI2 Output, 90 Auto - Answer, 8, 16, 34, 44 Caller ID, 3, 53, 54, 56, 60, 101 Command Characters, 15, 23 Command State Options, 43 Contacting ZyXEL, vi Data State Screens, 36 DATA/VOICE Switching, 33 DEFAULT DIAL menu,[...]

2 Index Panel Lock, 40 PC Serial Port Pinouts, 139 Phone Jack Pinouts, 139 Phone Numbers, 20, 21 Dialing stored, 21 Storage, 20 power adapter, 10 Power Level Setting, 45 Powering Up, 12 Rear Panel Markings, 9 Redial operation, 34 Remote Configuration, 52 Requi red Equipment, 1 Resetting The Modem, 126 Result Code Options "ATXn", 121 Resul[...]