ZyXEL U-1496S Plus User Guide

ZyXEL U-1496S Plus Manual

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  • ZyXEL U-1496S Plus | User Guide - Page 1
    ZyXEL U-1496 Series Modems User's Manual Copyright 1994-1997 by ZyXEL Communications Corp.
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    not specifically mention the plus version in this manual unless there are functional or operational differences. The U-1496 LCD model is always a plus version. HOW TO USE THIS MANUAL This manual describes the use of all models in the U-1496 series, the U-1496, U-1496E, U-1496B, U-1496P, and U-1496R
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    RS-1600 rack system comes with a supplemental User's Guide describing the use and installation of the rack system. The Network Management System comes with a separate manual detailing its installation and usage. Compatibility ZyXEL U-1496 series modems are high performance universal modems capable
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    G3 Fax implemented according to T.30, V.17,V.29 and V.27ter. Cellular Modes ZyXEL proprietary cellular modes, 14400 bps to 2400 bps speed range. 1800 Hz guard line. (4-wire leased line on U-1496 and U-1496R only.) Auto-dial/answer and manual originate/answer. Tone/Pulse dialing. Dial tone,
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    trip echo delay Carrier loss counter Rate change granted Rate change requested Blocks retransmitted Blocks in error 20 X 2 LCD display and directional keypads. (On U-1496 model only, 20 x 4 on rack panel.) G3 Fax send and receive capability with speeds up to 14400 bps. Fax-Polling / Fax-Grouping
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    (U-1496 only) one (1) U-1496 series user's manual one (1) ZFAX 3.5" floppy disk one (1) warranty/registration card one (1) Quick Reference card Contact and update information. You don't have to register to receive warranty service. A dated invoice as proof of purchase along with the warranty card
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    and the software controls the modem by the AT commands. ZyXEL modems support the extended AT command set and are compatible with most communication 3-3. DIAL-UP OR LEASED LINE The U-1496E and U-1496B can connect to 2-wire dial-up or leased lines only. The U-1496 and U-1496R offer you a choice of
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    telephone network and reach the other modem. The remote modem translates the analog signal received back into data (demodulation) and sends the information to the receiving end computer. Modems are telephones for computers, what they use to talk to each other. ((*MODE-02*; Modem as used in computer
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    is following the CCITT standard now for newer and higher speed modems. ZyXEL U-1496 series modems support all the above mentioned modem standards and are compatible with existing modems. TYPE OF TELEPHONE LINE The commonly used phone service is a 2-wire dial-up line. Only two wires connect the modem
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    service is also available from phone companies in a 4-wire form. Here the transmitting and receiving signal each uses a separate 2-wire pair and thus no echo problem everything was controlled by manual switches, either internal or . ZyXEL has defined a set of extended AT commands to support many
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    commonly used error correction protocols are MNP (R) and V.42 protocols. DATA COMPRESSION Intelligent modems use redundancy removing methods to reduce the number of data bits actually sent for asynchronous character transmission. The full character data is recovered at the other end, thus the total
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    or V.42 error protocols. Whenever possible, we recommend the use of Zmodem for added security and high flexibility. Consult your communications program manual for more information on transfer protocols. FAX AND FACSIMILE Fax is the abbreviation for facsimile. There are four major parts in a normal
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    interface. Faxmodems and fax software supporting this standard will work together. The problem is that there are several information is the telephone number of the calling party or caller ID. ZyXEL modems can detect and report caller ID. DISTINCTIVE RING This is a service available from some phone
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    or even hang up. Instructing a cellular phone to change transmitting power will cause similar problems. The other particularly annoying first try. The modems of the U-1496 series also offer the ability to do cyclic redials of a set of up to ten different numbers. MODEM AND LEGAL MATTERS In some
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    guide for model U-1496, U-1496E, and U-1496P. The U-1496R comes with its own installation guide. The installation guide for ZyXEL modem located on the sides and bottom should not be covered and should allow free movement of air. U-1496 FRONT PANEL Fig. 3-1 shows the front panel of the U-1496
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    B. MODEM CONNECTION When you connect your U-1496 to the power line, make sure you only use the ZyXEL power adapter that is supplied with this unit an AC power outlet and has a 2-meter cord. Connect the U-1496 as shown in Fig. 3-3. Connect U-1496E in the same way, except there is no Leased Line jack.
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    up when modem is in a test mode. U-1496E FRONT PANEL SWITCHES VOICE/DATA A toggle switch go off-hook and dial the default number. ANS/ORG A locked switch, it manual off-hook. ATD or ATA command will automatically determine the mode. U-1496E REAR PANEL MARKINGS Fig. 3-6 shows the rear panel of U-1496E
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    to U-1496 rear panel description and modem connection for U-1496E's rear panel attached AC power adaptor or car battery through the cigarette lighter cable as quality. Red and Green both FLASH: the number of flashes indicate the error code of power- port connector supports both synchronous and
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    convenient method. The cellular adaptor available from certain vendors will adapt a specific cellular phone unit to a normal 2-wire phone interface for the modem connection. It provides dial tone and ring signal to the modem. Because of the absence of a cellular interface standard, a special
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    instructed in this chapter, and you're all set. This chapter also familiarizes you with the panel operation of the U-1496 . U-1496E and U-1496B modem users can also consult the U-1496's panel ON SCREEN BUTTONS: D Dialing menu. R Redial last number. O Originate mode on-line. A Answer mode on-
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    options selection. Up arrow key also called the MENU key, is used for vertical 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
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    will show the following screen: ((MODE-10 (mod.))) Equivalent AT commands: AT&Z? View all stored phone numbers. ATDSn n=0-9, dial stored number. The first stored number shown on the menu is the default dial number and can be selected from the DEFAULT DIAL menu. By pressing the left or right arrow
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    NUMBER The same procedure is used when entering numbers, as in the STORE NUMBER operation. After number entry is completed, press the ENTER key to dial the number. ((MODE-12)) Equivalent AT command: ATD1234567 Dial phone number. MANUAL enable data communications. For U-1496E, use the VOICE/DATA
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    the last call up to 9 (depending on the country) times. AUTO ANSWER Move to the STATUS REGISTER menu, and change the S0 value to the number of rings until the modem will automatically answer. A value of zero disables auto answer. Equivalent AT commands: ATS0=0 Disable auto-answer. ATS0=n Auto answer
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    ((MODE-14)) then the modem will go back to the IDLE STATUS screen. If the line is busy, after 3-5 seconds, the LCD displays: ((MODE-15)) then goes back to IDLE STATUS screen. If the phone company is ringing the remote modem, a RINGING message is sent to the terminal. Setting S42.6 = 1 will disable
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    Retrain Granted 0 Retrain requested 0 Round trip Echo Delay Carrier Loss counts 0 128 T (1/2400 sec) The ON-LINE STATUS screen 4 shows: FRN (Fast Rate reNegotiation) Granted 0 FRN Requested 0 Blocks Retransmitted 0 FCS (Frame CheckSum) Errors 0 Pressing the left or right arrow key in any one of
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    parameters using the U-1496 CONFIGURATION menu tree. U-1496E, U-1496P, and U-1496B users can also consult this AUDIO OPTIONS STATUS REGISTER SAVE TO RESET Every submenu screen defines certain parameters of U-1496 operation. Submenu selections are made by using the left and right arrow panel keys.
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    To save the current parameter settings to non-volatile EEPROM, access the SAVE TO submenu in the CONFIGURATION menu and select from the various profiles you wish to save the changes to, and the parameter settings will be permanent in that profile. You can always recall in these settings by resetting
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    IGNORED AT&D0 Modem assumes DTR always ON, ignores the changes. 108.1 AT&D1 An OFF-ON DTR transition causes the modem to dial the number specified under the DEFAULT DIAL of the MODEM OPTIONS submenu. An ON-OFF transition disconnects the modem from the line. + DTR/108.2 AT&D2 Data
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    + TRACKS CARRIER AT&C1 DCD ON when carrier is detected. (see also S38b3). If S42.7=1, DCD only pulses off for 0.5 sec when carrier loss happens. ALWAYS ON AT&C0 Modem forces DCD always ON. RTS OPTIONS + IGNORED AT&R1 Modem assumes RTS always ON, ignores the changes. CTS TRACKS RTS AT&R0 Delay before
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    (Set S42.4=1 to disable V.17 in calling mode) ZyX 19200 @ AT&N34 ZyXEL 19200 ZyX 16800 AT&N35 ZyXEL 16800 ZyX 14400 @ AT&N36 ZyXEL 14400 ZyX 12000 @ AT&N37 ZyXEL 12000 ZyX 9600 @ AT&N38 ZyXEL 9600 ZyX 7200 @ AT&N39 ZyXEL 7200 CELL 14400 AT&N42 CELL 14400 CELL 12000 AT&N43 CELL 12000
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    2400C Note: @: All ZyX modes except ZyX 16800 are available only on Plus models. QUALITY ACTION AUTO RETRAIN AT*Q1 When poor signal quality is cannot to continue operation, the originate mode modem will automatically dial the number stored in the memory address selected. The answer mode modem also
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    when S35 bit 3 is set. PHONE JACK + SINGLE RJ11 AT&J0 RJ11 permissive telephone jack for dial-up line. MULTIPLE RJ12/13 AT&J1 Modem supports A/A1 multi-extension telephone. MAKE/BREAK RATIO + 39% / 61% AT&P0 For use in USA/Canada and some other countries. 33% / 67% AT&P1 For
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    the line in the same location as that for the 2W LEASED line. Note: For wiring information on the leased line, please refer to Appendix B. U-1496E, U-1496P, and U-1496B can only connect a 2-wire leased line to their dial-up jack. ERROR CONTROL CONTROL LEVEL Control Level Error Control Data
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    . A value of 0 disables the ring function. Chapter Six - PROFILES The U-1496 series modems let you save up to 4 sets of configurations, which are called of profile numbers in the AT&Wn and AT&Vn commands. AT&Wn There are 5 sets of pre-programmed profiles that come with each U-1496 series modem
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    of profile settings by typing AT&Vn (n=0-5) from the terminal. Following are the commands and their responses. The value shown for each register is a decimal number. AT&V0 Current Settings B0 E1 L4 M1 N5 Q0 V1 X5 &B1 &C1 &D2 &G0 &H3 &J0 &K4 &L0 &M0 &N0 &P0 &R1 &S0
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    OK Profile 0 satisfies most asynchronous applications. ZyXEL preset this profile to be the same as the factory default. A summary of this profile is: DTE speed 38400 bps Link Option MULTI-AUTO Data
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    RTS Ignored DCD Tracks Carrier DSR Always On Error Control V.42bis + MNP5 Flow Control CTS/ RTS Quality Action Adaptive Rate Line Type 2W Leased Line Terminal Keyboard Aborting Disabled Auto Handshake Originate AT&V3 Profile 2 Settings B0 E1 L4 M1 N5 Q0 V1 X5 &B1 &C1 &D2 &G0 &H0 &J0 &
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    =030 S39=000 S44=000 S49=000 S54=000 S59=000 OK Profile 3 is set for the needs of synchronous 4-wire leased line operation. For U-1496E, U1496P, and U-1496B, the default setting of this profile is the same as profile 0 since they don't have 4-wire mode. Link Option MULTI-AUTO Data
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    000 S54=000 S59=000 OK Factory default setting is stored in ROM, ZyXEL presets User Profile 0 the same as the factory default. RESET FROM power-on default profile. This can be done from the panel control of U-1496, or by issuing commands from your terminal. On RESET submenu screen, the profile
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    of profile 0, this will also reset the supervisory password to "ZyXEL" (see last section). On U-1496E, holding the VOICE/DATA switch down while powering on the modem have to recall the profile to make it active (see Chapter 6). The U-1496 series modems have 60 S-Registers from S0 to S59. S0 to S11
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    do the same is much easier. Note: If you enter values from the U-1496 front panel, use the sedecimal (hex) values. S-REGISTER DESCRIPTIONS Following are and the user should not change them. S0 Default= 0; Sets the number of rings on which the modem will answer automatically. S0=0 disables
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    S11 Default=70; Sets the duration and spacing, in milliseconds, in touch-tone dialing. Note: The number values of ASCII codes are always given as decimals. If you enter values from the U-1496 front panel you must convert these values to sedecimal (hex) values. S12 Reserved. S13 Bit-map register
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    =1; (1,0) =0; =1; =2; 2 stop bits. Even parity. Odd parity. No parity. S16 Test status register, default = 0 =0; No test in progress. (Default) =1; Analog loopback test in progress. =2; Reserved. =3; Local digital loopback test in progress. =6; Remote digital loopback test in progress. =7; Remote
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    =48; CELL 3600 3600C =49; CELL 3600 2400C Note: Not all models support all modes. Check the compatibility table for available modes. S20 DTE speed, default=2 ON. =1; 108.1, DTR OFF-ON transition causes dial of the default number. DTR OFF causes hang-up. =2; 108.2, Data Terminal Ready, DTR OFF
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    Mn (2,1) =0; =1; =2; =3; *En (0) =0; handshake fails. =1; Speaker always OFF. Speaker ON until carrier is detected. Speaker always ON. Speaker ON after last digit is dialed out until carrier detected. Maintain non-error control connection when error control Drop connection when error control
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    automatically switch to dial line and the originate mode modem will dial the number according to the pointer saved here if dial backup was enabled. The answer line and wait for ring if dial backup is enabled (a non-zero number is selected). S31 Default=17; Holds the ASCII decimal value of the XON
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    the U-1496E and U-1496R. When Data/Voice switch is pressed, modem will dial the default number. (See the call-back number. Note: * In security type 1, the remote site must be a ZyXEL modem. In security Local profile number. (3,2,1,0) =0-5; Remote profile number. Note: When using U-1496 panel for
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    S39 Bit-mapped register, default = 000 (7) =0; Does not include resync information in recorded voice data. =1; Includes resync information in recorded ADPCM file. Note: When the resync function is enabled, the modem sends a resync symbol (hex 10 and 12) every 50 ms. ADPCM data can be
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    cellular mode. (2) =1; Disable cellular mode Auto Transmit Power Adjustment. Use S49b0-3 to set transmit power. (1) =1; Disable ZyXEL 19200 bps in Multi-Auto mode. (0) =1; Disable ZyXEL 16800 bps in Multi-Auto mode. S44 Bit-mapped register, default = 000, (6) =1; When selected with &B0, DTE
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    stored in EEPROM at location n(0-9). S44.3=1 enables cyclic dial. If the first dial is not successful, it will cycle dial through all the numbers stored in memory. E0 Disable character echo in command state. + E1 Enable character echo in command state (Default). H0 Go on-hook (hang-up). Same
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    I0 Display product code "1496" for U-1496 series modems. Same as ATI. I1 Display ROM after answering on a RING. (See also Sr=n Set S-Register `r' to value `n', n must be a decimal number between 0-255. Sr? Display value stored in S-Register `r'. Sr.b=n Set bit 'b' of S-Regis 'r' to value
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    + 12 CONNECT 9600 + 14 CONNECT 19200 + 15 CONNECT 7200 + 16 CONNECT 12000 + 17 CONNECT 14400 + 18 CONNECT 16800 + 19 CONNECT 38400 20 CONNECT 57600 21 CONNECT 76800 - 0 0 0 0 + + 0 0 0 0 + + 0 0 0 0 + + 0 0 0 0 + + 0 0 0 0 + + 0 0 0 0 + + 0 0 0 0 + - 0 0
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    carrier (Default). (See also S38b3, S42b7.) &D0 Ignore DTR signal, assume DTR always ON. &D1 108.1, DTR OFF-ON transition causes dial of the default number. (See also *Dn). + &D2 108.2, Data Terminal Ready, DTR OFF causes the modem to hang up and return to command state (Default). &D3 Same as
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    /4800. &N24 Bell 212A 1200. &N25 Bell 103 300. &N32 V.17 FAX 14400/12000/9600/7200, V.29 FAX 9600/7200, V.27ter FAX 4800/2400. &N34 ZyXEL 19200 &N35 ZyXEL 16800. &N36 ZyXEL 14400. &N37 ZyXEL 12000 &N38 ZyXEL 9600 &N39 ZyXEL 7200 &N42 CELL 14400
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    except V.29; V.32bis 7200 is also trellis coded. Not all modes available in all models. Check the compatibility table. All ZyXEL modes except ZyXEL 16800 are available only with Plus models. + &P0 Pulse dial make/break ratio= 39%/61% (Default). &P1 Pulse dial make/break ratio= 33%/67%. &R0 CTS
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    type 2 security, with password check and call back, remote site enters the call-back number. Notes: 1. The command *Gn needs supervisory password checking. 2. In security type 1, the remote site must be a ZyXEL modem. 3. In security type 2, the remote site can be any other modem. 4. Modem
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    (Default). *Q3 Disconnect for poor signal quality. *Rab Read remote profile b to local profile a. a= 0-3, local user profile number. b= 0-3, remote user profile number. 4, remote active configuration. 5, remote factory default. Note: The command *Rab only works when modem is on-line, no
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    error free by detecting and retransmitting the data in error. ZyXEL modems support both MNP and V.42 error control protocols. The MNP end flag (01111110). The maximum data block size used in the U-1496 series is 256 bytes. The maximum number of outstanding blocks without acknowledgements is 31 for
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    token is generated from a dynamic tabulation of character appearing frequency. Total number of available tokens is 256, of which only the first 32 tokens are of string tokens according to data that appears. U-1496 series modems support a dictionary size up to 2K string tokens. The input data
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    modems use some controls and commands to make the modem optimize its performance. ADAPTIVE BLOCK SIZE Depending on the line condition, ZyXEL U-1496 series modems will automatically adjust the block size to minimize the error rate and re-transmission time. AVERAGING THROUGHPUT At high DTE speeds
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    the computer's speed is less of a problem now. The default setting for throughput averaging computers, a change of resolution or of the number of colors may result in higher speeds, because not receive more data than it can handle. The U-1496 series modems provide two kinds of flow control methods.
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    synchronous. Synchronous operation applies to all the non-FSK modes that the modem is supplied with. The U-1496, U-1496E, U-1496P, and U-1496R stand alone, portable, and rack mountable models support synchronous mode operation, but the U-1496B has a built-in PC asynchronous serial port and can only
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    always use panel operation to control and configure the modem and use manual dial and answer to operate the modem. DIAL FROM SYNCHRONOUS MODE 1496E, with S35 bit 4 set, pressing DATA/VOICE switch will also cause dialing of the default number. 4) Dial from panel This is available only with U-1496
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    MANUAL ANSWER FROM SYNCHRONOUS MODE Type `ATA' from the terminal (if set &M1) or press `A' on the IDLE SCREEN menu from the front panel. On the U-1496E, or a leased telephone circuit from the telephone company. The U-1496 and U-1496R support 4-wire and 2-wire leased lines. 4-wire leased lines use
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    the U-1496 and U- number MANUAL CONNECTION Set the modem to leased line mode. Type asynchronous command `ATD' to the originating modem and `ATA' to the answering modem, or press `O' on the IDLE SCREEN menu of the originating modem and press `A' on the IDLE SCREEN of the answering modem. On U-1496E
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    The U-1496, U-1496R, U-1496P, and U-1496E support both asynchronous and synchronous leased line operation. Choose modem will monitor the dial-up line for rings. The originating modem will try to dial the number up to nine times or until a 3-minute timer timeout happens. If the dial backup attempt
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    1496 to switch to the IDLE STATUS screen. Either manually on-line or, if you have set the leased line as the power-on default, turning the power OFF and ON will make the modem go to the leased line again. On the U-1496E dial back at the phone number corresponding to the dial-in is "ZyXEL" when modem
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    within this time limit the line will be disconnected. If the remote site is to enter the call back number it will be prompted to do so. REMOTE CONFIGURATION The U-1496 series modems provide the remote configuration capability that a local modem can configure the remote modem and reconnect at the
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    modem to accept remote configuration request. Remote configuration can also be activated from U-1496 or U-1496R's LCD panel. The remote modem is set to grant remote once. CALLER NUMBER DELIVERY (CND) Caller Number Delivery (CND), or commonly called Caller ID, is a new kind of phone service that may
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    AT-NWT-000030 document for data format. DISTINCTIVE RING This is a phone service that may be offered by your phone company. Check your phone company for availability. With this service, you can have several phone numbers assigned to the same phone line. The phone company will send a different
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    if you do not have distinctive ring service. If more than one type of n is the ring type number. Other countries may have supported by the communication software on the computer. The U-1496 series modems supports both asynchronous and synchronous V.25bis dialing. However, the internal card supports
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    ZyXEL U-1496 series modems provide the cellular mode, the U-1496P portable modem is specially designed for portable use. It is portable in size and capable of using the DC12V car battery Advanced Mobile Phone Service) in North another cell, it will be instructed to switch its radio link the number of
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    also does V.42 link layer enhancements. ZyXEL CELLULAR MODES In addition to normal modem, fax, and voice operation modes, the following cellular modes are offered in the U-1496 series modems: Mode Speed Multi-Auto CELL 14400 CELL 12000 CELL 9600 CELL 7200 CELL 4800T CELL 4800C CELL 3600C CELL
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    Forward error correction mode is used when there is a high number of errors. The modem will automatically and dynamically select the best modem, the connection will automatically be a regular modem mode. If a manual transmit power setting is desired, set S43b2=1 to disable auto transmit power
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    instructions. THE CCITT T.30 FAX PROTOCOL The CCITT T.30 fax protocol describes the G3 fax handshake signals and procedures. The U1496 the line quality is not good enough. THE FAX COMMAND SETS The U-1496 series universal modem supports two command sets for the fax function, the EIA PN 2388 Class 2
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    >? Read possible settings +=? Read current setting Supported Commands (per EIA PN2388 8/20/90) +FAA=n Auto answer mode parameter n=0 DCE to answer as set by +FCLASS n=1 DCE can answer and auto. determine calling type +FCLASS=n Service class selection n=0 Set to modem mode n=2 Set
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    standard frame FIF octet string +FREV? Request DCE revision +FSPL=n Enable polling command n=0 Disable polling n=1 Enable polling 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. The Class 2 Command
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    enabled. Extended FAX AT Commands These commands are unique to the U-1496 series modems. The computer controls the modem through a set of extended are separated from the received fax data. The modem sends "CONNECT FAX" and "ZyXEL" first, then it waits for the DC2 character (hex18) to send the fax
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    which includes the connection speed and the fax parameters after handshaking with the remote facsimile. Snnnn Fax connection speed; nnnn is a 4-digit number representing the connection speed. nnnn=1440, 1200, 9600, 7200, etc., where 1440 and 1200 stand for 14400 and 12000. Vn Vertical resolution
  • ZyXEL U-1496S Plus | User Guide - Page 81
    Tn Coding scheme; n=0 or 1. Rn Recording width; n=0, 1, or 2. Ln Recording length; n=0, 1, or 2. Cn Scan line time; n=0 to 7. P Remote fax number. After each fax disconnection, the following result code is sent back to the DTE (computer): DISCONNECTnP This result code informs
  • ZyXEL U-1496S Plus | User Guide - Page 82
    This will disable the modem from receiving a fax. 4. Set the modem autoanswer ring number to be the same as your fax machine. For example, if you have set successfully in this case. RECEIVE FAX IN THE BBS SYSTEM The ZyXEL modem has the unique feature of automatic detection of data and fax
  • ZyXEL U-1496S Plus | User Guide - Page 83
    are supported on all U-1496 series modems. However, the advanced CELP scheme is supported only on the plus models, including the U-1496 LCD process. The calling party is instructed to push one number in the push-button pad for fax calling and push another number for voice calling. By detecting
  • ZyXEL U-1496S Plus | User Guide - Page 84
    . VOICE AT COMMANDS The U-1496 series modems support a set of voice AT ZyXEL is continuously enhancing its modem's voice capability and voice command implementation. Please refer to the manual amendment or firmware release notes for updated details. The following is a summary of the supported
  • ZyXEL U-1496S Plus | User Guide - Page 85
    FLOW CONTROL Software XON/XOFF flow control is used. SUPPORTED COMMANDS FOR VOICE MODE OPERATION AT+FCLASS= This command selects a . ATD (with AT+FCLASS=8) This command causes the DCE to dial a phone number. Result codes: VCON: The DCE issues this result code when the DCE has
  • ZyXEL U-1496S Plus | User Guide - Page 86
    ATH (with AT+FCLASS=8) This command causes the DCE to hang up the phone with the following considerations for a hang up while in voice mode: - Force the command AT+FCLASS=0, but do not destroy any of the voice parameters. - Force voice I/O device to Telco line. AT+VNH= This command causes the
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    OK: ERROR: The DCE issues this result code if DCE accepts this command. The DCE issues this result code if parameter is out of range. AT+VBT? DCE will return current beep duration setting, followed by the OK result code. AT+VBT=? DCE will return permitted values of beep duration. The
  • ZyXEL U-1496S Plus | User Guide - Page 88
    AT+VLS? DCE will return current I/O device followed by the OK result code. AT+VLS=? DCE will return permitted I/O devices. The response is: 0,2,8,16 OK with between each line. AT+VRA= This command sets the amount of time the DCE shall wait between ringbacks before the DCE can
  • ZyXEL U-1496S Plus | User Guide - Page 89
    the higher the sensitivity threshold level. The magnitude difference in sensitivity level has a unit of dB. = 0 means silence detection is disabled or not supported. The range of the interval is from 0 to 255 in units of 0.1 second. Result codes: OK: ERROR: The DCE issues this result
  • ZyXEL U-1496S Plus | User Guide - Page 90
    Kbps 2-bit ADPCM = 3, 28.8 Kbps 3-bit ADPCM Note: Only PLUS models support CELP mode. AT+VSM? This command causes the DCE to report current compression settings in second item is the compression scheme; the third item is number of bits per sample; the fourth item is the silence detection threshold level
  • ZyXEL U-1496S Plus | User Guide - Page 91
    units of 0.1 second. 3) A single ASCII character and a number, separated by commas and enclosed in curly braces. The DCE should interpret the ASCII character as this period, commands and responses will be in shielded form. The supported shielded codes are as follows (all shield codes are case
  • ZyXEL U-1496S Plus | User Guide - Page 92
    long a data history. If you convert the compressed voice data into the uncompressed PCM data file, you can always edit the PCM file with no problem. The resync symbol is a shielded code - (hex 10 and 12). Resync generation is controlled by the setting of S39b7. S39b7 = 0; No resync
  • ZyXEL U-1496S Plus | User Guide - Page 93
    DTE AT+FCLASS=8 DCE ----------- OK comments Switch to voice mode AT+VSM=? ---> 1;CELP;1;0;(9600) 2;ADPCM;2;0;(9600) 3;ADPCM;3;0;(9600)
  • ZyXEL U-1496S Plus | User Guide - Page 94
    AT+VTX --->
  • ZyXEL U-1496S Plus | User Guide - Page 95
    1;CELP;1;0;(9600) 2;ADPCM;2;0;(9600) 3;ADPCM;3;0;(9600) Start to record
  • ZyXEL U-1496S Plus | User Guide - Page 96
    AT+VTX ---> Try to handshake Fax mode Switch to fax mode and answer fax call
  • ZyXEL U-1496S Plus | User Guide - Page 97
    Management System (MNMS). In this chapter we briefly describe the ZyXEL MNMS capability. For detailed description, please refer to the rack's user manual and the NMS software ZyView's operation manual. ZyXEL MODEM NETWORK MANAGEMENT SYSTEM ZyXEL's MNMS is centered around its rack system. Each rack
  • ZyXEL U-1496S Plus | User Guide - Page 98
    many racks each can link their NMS in this way. NMS CAPABLE MODELS All ZyXEL rack models are NMS capable but only the model with a "N" suffix (i.e., U- needed. The stand alone LCD model U-1496SN is the U-1496 with a secondary channel. It can be put on the end node of a hierarchical modem network
  • ZyXEL U-1496S Plus | User Guide - Page 99
    and to locate the source of a communication problem. POWER-ON SELF-TEST Each time the modem circuits, and analog circuit calibrations. On the U-1496 panel, the LCD will display the results of the ZyXEL Service Center for assistance, or follow the return procedure to return the modem to ZyXEL. If
  • ZyXEL U-1496S Plus | User Guide - Page 100
    Rate Meter. The left reader displays accumulated bit errors while the right reader displays accumulated bits sent. The U-1496E TST LED flashes for any bit error. The Control Level field of the U-1496 LCD screen will be indicated as 'ALBST', which stands for ALB with self-test. This test can only
  • ZyXEL U-1496S Plus | User Guide - Page 101
    modem according to V.54. If the remote modem supports V.54 and is programmed to grant this kind of modem will be indicated as 'LDL'. The U-1496E will have the TST LED indicator ON during the display of this section only applies to the U-1496 and U-1496R models. Regarding data being transmitted on
  • ZyXEL U-1496S Plus | User Guide - Page 102
    channel and degrade the data validity. To avoid this situation, decrease the transmitting power of the remote modem. For increased line operability, the U-1496's transmitting power level on a leased line operation could be adjusted from 0 dBm to -27 dBm. The default value is -9 dBm. Phase Jitter (PJ
  • ZyXEL U-1496S Plus | User Guide - Page 103
    command (ATI2) to see the summary, as in the following sample: ZyXEL U-MODEM LINK STATUS REPORT Chars Sent 2420 Chars Received2420 Octets Sent 950 Blocks Received 13 Blocks Resent 0 Max Outstanding 8 Max Block Size 256 Retrain Requested 0 Link Duration 1 Retrain Granted0 T401 Timeouts
  • ZyXEL U-1496S Plus | User Guide - Page 104
    control protocol parameter. The maximum allowable number of blocks sent or received without acknowledgement. Max Block Size Error control protocol parameter. The maximum allowable number of octets in a block. Actual block size can be smaller. Retrains Requested Number of times the local modem has
  • ZyXEL U-1496S Plus | User Guide - Page 105
    about 1300 T. Xmitter Underrun Number of times modem fails to provide data octet in time for transmission. Receiver Overrun Number of times modem fails to quality of the line. On the U-1496E, the EC LED will flash to indicate retransmission. DIALING INDICATOR On the U-1496E, the HS LED will flash 1
  • ZyXEL U-1496S Plus | User Guide - Page 106
    . On the U-1496, holding the ENTER key down for a few seconds while powering up will reset the modem. On the U-1496E, holding the VOICE there is a hardware problem. Contact the nearest service center for help. If SQ flashes, the number of flashes indicates the error number corresponding to the error
  • ZyXEL U-1496S Plus | User Guide - Page 107
    Plus models, need 2M EPROM. The other suffix character meanings are: S for U-1496 (stand alone), B for U-1496B, R for U-1496R. Each firmware release is a set of two firmware files with extension U24 and U25. For U-1496 and U-1496E will damage the IC. ZyXEL is constantly doing firmware enhancements
  • ZyXEL U-1496S Plus | User Guide - Page 108
    be. ZyXEL only guarantees features listed in the original product description. New releases of the firmware are released as EPROM files through bulletin board systems and networks.
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ZyXEL
U-1496 Series Modems
User’s Manual
Copyright 1994-1997 by ZyXEL Communications Corp.