ZyXEL Communications U-1496 series Manuel d'utilisateur Page 1

ZyXELU-1496 Series ModemsUser’s ManualCopyright 1994-1997 by ZyXEL Communications Corp.

A leased-line phone service is also available from phone companies in a 4-wire form. Here thetransmitting and receiving signal each uses a separate 2-

The U-1496E has only LED indicators. The TST LED will be ON during power-on self-test, andOFF after the test if the test is OK. The SQ LED will flash

This test will request the remote modem to do a digital loopback. During testing, the localmodem will send a remote digital loopback request to the re

This reading is expressed in 0.1 dBm resolution. The modem measured receiving signal power isgenerally within 1-2 dBm of the actual value and with rel

The count of blocks retransmitted (Bad receiving on the remote modem).FCS (Frame Check Sum) Errors (FE)The count of FCS errors received (block errors)

Data bytes sent to remote modem.Octets ReceivedData bytes received from remote modem.Blocks SentBlocks sent to remote modem.Blocks ReceivedBlocks rece

Round trip delay between modems in T (1/2400 sec) units. Normally should be in the range of100-200. A satellite link will introduce a delay of about 1

HANDSHAKING AND RETRAIN INDICATOROn the U-1496E, the HS LED will flash 1/2 second on and 1/2 second off to indicate that modemis in handshaking or ret

Most of the U-1496 series modems' functions and features are controlled by the system firmwarecontained in two EPROMs. These two EPROMs are label

be. ZyXEL only guarantees features listed in the original product description.New releases of the firmware are released as EPROM files through bulleti

interfaces and finds most of its use in Europe and IBM mainframeor mini environments which use synchronous communication.ERROR CORRECTIONIn synchronou

V.42bis is used with V.42 for error correction.XMODEM, YMODEM, AND ZMODEMThese are file transfer protocols used by the host (e.g., thecommunications p

internal PC plug-in card. External stand alone units can beconnected to any computer with a standard RS-232 serial port.This computer need not be a PC

can also playback a recorded digital voice message either locallyor to the line as an announcement.Digital voice messages need speech compression to r

Chapter Three - MODEM INSTALLATIONThis chapter describes the panel function and installation guidefor model U-1496, U-1496E, and U-1496P. The U-1496

LEASED LINE Leased-line JM8 terminal jack, for connection to a2/4-wire leased line. DIAL-UP LINE Dial-up line RJ11 terminaljack, for connection to

LED IndicatorsHS High Speed indicator, lights up when modem is in V.32 orV.32bis mode. Dialing indicator, flashes one second on and onesecond off wh

U-1496E does not have the leased line jack.((MODE-37))Refer to U-1496 rear panel description and modem connection forU-1496E's rear panel explana

convenient method. The cellular adaptor available from certainvendors will adapt a specific cellular phone unit to a normal2-wire phone interface for

Chapter One - INTRODUCTIONTHE U-1496 SERIES UNIVERSAL MODEMSThe U-1496 series of high-speed modems feature five base models.They are:U-1496External

Chapter Four - QUICK STARTThis chapter tells you how to dial and answer on a modem. If youuse this modem with a PC, you probably don't need to

options selection.Up arrow key also called the MENU key, is used for verticalmenu selection and is used to access the previous menu. The uparrow key

; Return to COMMAND STATE@ 5 second silent wait! Hook flashP Pulse dialingR Reverse dialingT Tone dialingW Wait for dial tone-

press ENTER again to save the entry in the EEPROM. The storednumbers will remain in memory until you revise or delete them.Pressing the up arrow key i

answer mode on-line. Whenever your modem establishes a connectionwith another modem, one of the modems must be in answer mode andthe other modem must

((MODE-14))then the modem will go back to the IDLE STATUS screen. If theline is busy, after 3-5 seconds, the LCD displays:((MODE-15))then goes back to

Retrain Granted 0Retrain requested 0Round trip Echo Delay 128 T (1/2400 sec)Carrier Loss counts 0The ON-LINE STATUS screen 4 shows:FRN (Fast

parameters using the U-1496 CONFIGURATION menu tree. U-1496E,U-1496P, and U-1496B users can also consult this menu tree foravailable parameter option

To save the current parameter settings to non-volatile EEPROM,access the SAVE TO submenu in the CONFIGURATION menu and selectfrom the various profiles

connection.CHARACTER LENGTH+ 10 AT*C0 10-bit characters. 11 AT*C1 11-bit characters. 9 AT*C2 9-bit characters. 8

basic overview of the U-1496 series modems' features, introducessome basics of modem operation for novice users, and explains theinstallation of

+ TRACKS CARRIER AT&C1 DCD ON when carrier is detected.(see also S38b3). If S42.7=1, DCD only pulses off for 0.5 secwhen carrier loss happ

1200 600 300MODEM OPTIONSLINK OPTIONS+ MULTIAUTO AT&N0 Auto handshaking with ZyX19200 19200 Zyx16

CELL 9600 AT&N44 CELL 9600 CELL 7200 AT&N45 CELL 7200 CELL 4800T AT&N46 CELL 4800T CELL 4800C AT&N47

+ DENY AT&T5 Ignores remote digital loopback test requestfrom remote modem.LLINE ???Spelling okay??? TX POWER 0 to -15 dBm AT*P0-15

will handshake in originate mode. ANSWER AT*M1 When operating over a leased line, modemwill handshake in answer mode.Note: If you need two

BREAK HANDLING DESTRUCTIVE AT&Y0 Destructive, expedited. Send break,throw away data in buffer. EXPEDITED AT&Y1 Non-destruct

can modify these profiles and save them for your specific applications. You can view each set ofprofile settings by typing AT&Vn (n=0-5) from the

OKProfile 0 satisfies most asynchronous applications. ZyXEL preset this profile to be the same asthe factory default. A summary of this profile is:DTE

RTS IgnoredDCD Tracks CarrierDSR Always OnError Control V.42bis + MNP5Flow Control CTS/ RTSQuality Action Adaptive RateLine Type 2W Leased LineTermina

&B1 &C1 &D0 &G0 &H0 &J0 &K0 &L2 &M3 &N0 &P0 &R0&S0 &X0 &Y1*B0 *C0 *D0 *E0 *F0 *G0 *I0 *L0

V.33 12,000 2400 64-TCM 1800V.32bis 14,400 2400 128-TCM 1800V.32bis 12,000 2400 64-TCM 1800V.32bis 7,200 2400 16-TCM 180

S50=000 S51=000 S52=000 S53=000 S54=000S55=000 S56=000 S57=000 S58=000 S59=000OKFactory default setting is stored in ROM, ZyXEL presets User Profile 0

Setting S35.6 in profile 0 will also protect the supervisory password. If this bit is set, thesupervisory password cannot be reset to the default &quo

to set only bit 'b' of S-Register 'r' to value 'n' without affecting other bits in this S-Register.When using ATSr = n,

S5 Default=8; Holds the ASCII decimal value of Backspace character. A value of 128-255 disables the Backspace key's delete function.S6 Default=3;

=1; 2 stop bits.(1,0) =0; Even parity.=1; Odd parity.=2; No parity.S16 Test status register, default = 0=0; No test in progress. (Default)=1; Analog l

=32; V.17FAX 14400/12000/9600/7200,V.29FAX 9600/7200,V.27terFAX 4800/2400.=34; ZyX 19200 19200=35; ZyX 16800 16800=36; ZyX 14400 14400=37; ZyX 12000 1

Mn (2,1) =0; Speaker always OFF.=1; Speaker ON until carrier is detected.=2; Speaker always ON.=3; Speaker ON after last digit is dialed out until car

=2; MNP4 + MNP5. (See also S41b0, S38b5)=3; V.42 +MNP4.=4; V.42 + V.42bis (compatible with &K2, see also S38b5).S28 Bit-mapped register, default =

control connection is made, used with ATV0 (S23b6), see result code table.(6) =1; Enable password protection to profile saving. When AT&W0 isissu

S39 Bit-mapped register, default = 000(7) =0; Does not include resync information in recorded voice data.=1; Includes resync information in recorded A

Programmable speaker volume control.Non-volatile memory storage.Remote configuration.Security call back.Caller ID detection.Distinctive ring detection

(6) =1; Disable "RINGING" result code. (See ATXn).(5) =1; button.(4) =1; V.17 fax in calling mode, no effect on answering mode (See&N0 a

S51 - S59 ReservedChapter Eight - AT COMMAND SET SUMMARYAn AT command is a command issued by the computer/terminal to the modem through theRS232 ser

I0 Display product code <197> "1496" for U-1496 series modems. Same as ATI.I1 Display ROM checksum and product information.I2 Display

+12 CONNECT 9600 0 0 0 0 + ++14 CONNECT 19200 0 0 0 0 + ++15 CONNECT 7200 0 0 0 0 + ++16 CONNECT 12000 0 0 0 0 + ++17 CONNECT 14400 0 0 0 0 + ++18 CON

34 CONNECT 720035 CONNECT 960036 CONNECT 1200037 CONNECT 1440038 CONNECT 1680039 CONNECT 19200Z0 Reset modem and load user profile 0.Z1 Reset modem an

+ &J0 Single phone line RJ11 phone jack (Default).&J1 Multiple phone/modem lines RJ12/RJ13 phone jack.&K0 No error control.&K1 MNP4 (i

&N43 CELL 12000&N44CELL 9600&N45 CELL 7200&N46 CELL 4800T&N47 CELL 4800C&N48 CELL 3866C&N49 CELL 2400CNote: All speeds ove

break is sent immediately.)+ &Y1 Non-destructive break, expedited (Default).&Y2 Non-destructive break, un-expedited.&Zn=s Store the dial s

Note: These commands *Hn and *HS need supervisory password checking. Any character canbe entered in the password (0-255). Maximum password length is e

Chapter Nine - ERROR CONTROL AND DATA COMPRESSIONERROR CONTROLError Control keeps the modem data link error free by detecting and retransmitting the

BEFORE YOU GET STARTEDBefore you proceed further, please check to see if you have allthe necessary materials from the shipping package and make sureno

DATA COMPRESSIONData compression works by representing the original data information in less bits andtransmitting the reduced data bits through the da

CONTROL LEVEL ERROR CONTROL DATA COMPRESSIONNone AT&K0 Disabled DisabledMNP4(MNP3) AT&K1 MNP4 DisabledMNP4+MNP5 AT&K2 MNP4 MNP5V.42(MNP4)

strings.Since new computers are much faster and there is an increasing use of serial port chips withinternal buffers like the 16550A UART, the compute

terminal. Be sure that the remote modem and system are also set to synchronous. Synchronousoperation applies to all the non-FSK modes that the modem i

SYNC DATA AT&M1 Modem accepts asynchronous command in command state, butexchanges data synchronously in data state.SYNC AT&M3 Modem accepts sy

MANUAL ANSWER FROM SYNCHRONOUS MODEType `ATA' from the terminal (if set &M1) or press `A' on the IDLE SCREEN menu from the frontpanel. O

2W LEASED AT&L1 Modem connected to 2-wire leased line, the line plug should be pluggedinto the jack assigned 'LEASED LINE' on the rear p

The U-1496, U-1496R, U-1496P, and U-1496E support both asynchronous and synchronousleased line operation. Choose a suitable modem link mode. If the si

DISCONNECT LEASED LINEDisconnecting (manually) the leased line will force the U-1496 to switch to the IDLE STATUSscreen. Either manually on-line or, i

The command AT*Hn will modify the nth user password. You will be prompted to entersupervisory password first and then be prompted to enter the nth use

Communication software controls the modem connected to thecomputer and directs data to and from the modem. For most casesin the PC environment, the mo

b=0-3 which is the remote user profile number.Remote profile read and write commands - *Rab and *Wab - only work on on-line condition. Itdoes not matt

RING04-28 12:30 7135551414RINGFor a multiple message format, if the caller's number and name are available, the ring messagewill beRINGTIME: MM-

different composition of the `ON' part of the ring. The U-1496 series modems can distinguish upto four types of ring signals and can be commanded

asynchronous V.25bis mode.Chapter Thirteen - CELLULAR MODE OPERATIONZyXEL U-1496 series modems are equipped with a special communication mode - cell

A real cellular modem must be able to conquer the cellular impairments and maintain a reliabledata link with reasonable data throughput through a cell

CELL 4800T uses a trellis coded modulation at 4800 bps speed. It has a better performance thanthe uncoded V.32 4800 bps mode.CELL 4800C uses forward e

Assume using a cellular phone data interface adapter, the following figures illustrate threeinstallation examples. Fig 13-1 is an example of a mobile

+<command>=<value> Execute a command or set a parameter+<command>? Read possible settings+<command>=? Read current settingSupp

+FET=n End the page or document commandn=0 More pages; same documentn=1 End of document; another document followsn=2 No more pages or documentsn=4 Pro

+FPTS:n Receive page transfer status response; refer to +FPTS=n command.+FTSI:"String" Report remote ID response TSI.+FVOICE Transition to V

telephone network and reach the other modem. The remote modemtranslates the analog signal received back into data(demodulation) and sends the informat

#R0 Set recording width: 1728 picture elements along a scan line length of 215mm.#R1 Set recording width: 2048 picture elements along a scan line leng

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<string> Remote fax n

1. Plug the phone cable from the wall jack into the modem's Line Jack.2. Plug the phone cable from the fax machine into the modem's Phone Ja

computer stores and forwards. It also means the modem can playback the recorded digitizedvoice either off-line for local message listening or on-line

announcement and will not get connected. Even if the data call is connected successfully, thelonger handshake delay may not be acceptable in some appl

FLOW CONTROLSoftware XON/XOFF flow control is used.SUPPORTED COMMANDS FOR VOICE MODE OPERATION AT+FCLASS=<mode> This command selects a D

ATH (with AT+FCLASS=8) This command causes the DCE to hang up the phone with the following considerations for ahang up while in voice mode:

OK: The DCE issues this result code if DCE accepts this command. ERROR: The DCE issues this result code if <value> parameter is out

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 respon

OK: The DCE issues this result code if DCE accepts this command. ERROR: The DCE issues this result code if <value> is out of range.

signal is sent; character timing is recovered from the dataitself.A PC's COM1 and COM2 are asynchronous serial ports. Most PCs' andUnix syst

OK with <CR><LF> between each line. AT+VSD=? This command causes the DCE to report the permitted range of <sds>

This command causes the DCE to produce DTMF and other tones. The tone generation string shall consist of elements in a list with each ele

<DLE>1: DTMF '1' received <DLE>2: DTMF '2' received <DLE>3: DTMF '3' received <DLE>4: D

DTE DCE comments------------- ------ ----------- ---------------------AT+FCLASS=8 ---> Switch to voice mode<--- OKAT+VSM=? --->1;CELP;1;0;(96

AT+VTX ---> Start to play<--- CONNECT<DATA> ---><DLE><ETX> ---><--- VCON Return to command stateAT+VLS=0 ---> Deac

1;CELP;1;0;(9600)2;ADPCM;2;0;(9600)3;ADPCM;3;0;(9600)<---OKAT+VSM=1 ---> Select CELP compression method<--- OKAT+VLS=2 ---> Connect to lin

AT+VTX ---> Start to play greeting message<--- CONNECT<DATA> ---><--- <DLE>c T.30 fax calling tone detectedor or<DLE>5 D

<--- OKATA ---> Try to handshake data mode. Switch to datamode and answer data call...CONNECT A PHONE HANDSET TO THE MODEM'S RJ11C LINE JAC

controls all the modem cards in the rack and interfaces to central NMS control station. A simpletwisted pair wiring can be used to link all the centra

Chapter Seventeen - DIAGNOSTICSThe U-1496 series modems provide several diagnostic capabilities:Power-Up Self-TestAnalog Loopback TestAnalog Loopbac