BASIC "AT" COMMAND SET

Command     Function and     Reference
            description

A/                           Re-execute last command

A>                           Repeat last command continuously

<any key>                    Terminate current connection attempt

+++                          Escape sequence code, entered in data state, wait for
                             modem to return to command state

ATA                          Force answer mode (see also S39b2)             S39b2

ATBn        Bn               Handshake option       S28b7

            B0   *           Select CCITT V.22 for 1200 bps communication

            B1               Select Bell 212A standard for 1200 bps

ATD                          Dial number and options that follows (see also S38b0,
                             S35b4)

            P                Pulse dial        S23b1

            T                Tone dial         S23b1

            ,                Pause for a time specified in S6

            ;                Return to command state after dialing

            !                Hook flash, call transfer

            W                Wait for second dial tone

            @                Wait for a 5-second silence before proceeding, otherwise
                             return 'NO ANSWER'

            R                Reverse frequencies (Originate a call in answer mode)
                             S17b5

ATDL                         Dial last number

ATDSn       n=0-9            Dial number stored in NVRAM at position n

ATEn                         Command mode local echo of keyboard commands.   S23b0

            E0               Echo off

            E1   *           Echo on

ATHn                         On/off hook control

            H0   *           Hang up (on hook)

            H1               Go off hook




BASIC "AT" COMMAND SET

Command     Function and     Reference
            description

ATIn                         Display  inquiry

            I0               Display product code

            I1               Display product info. & results of ROM checksum

            I2               Link status report

ATLn   n=0-7     *4          Speaker volume control       S24b5

ATMn                         Speaker control

            M0               Speaker always Off     S21b1

            M1   *           Speaker On until carrier is established

            M2               Speaker always On

            M3               Speaker On after last digit dialed, Off at carrier
                             detect

ATNn  n=0-7      *5          Ring volume control, n=0 Disable the ring
                             function.         S24b1

ATO                          Return to on-line state

ATP                          Pulse dial

ATQn                         Result code displayed        S23b6

            Q0   *           Modem returns result code

            Q1               Modem does not return result code

            Q2               Quiet in answer mode only (will not show in AT&Vn)
                             S40b1 S42b2

ATSr.b=n                     Set bit .b of register r  to n (0/off or 1/on).

ATSr.b?                      Inquiry bit .b of register r

ATSr=n                       Set S-register r  to value n, n must be a decimal
                             number between 0-255

ATSr?                        Display value stored in S-register r

ATT                          Tone dial

ATVn                         Verbal/Numeric result codes        S23b6

            V0               Display result codes in numeric form           S35b7

            V1   *           Display result codes in verbose form

ATXn  n=0-7      *5          Result code options, use the options table           S23b3


BASIC "AT" COMMAND SET

Command     Function and     Reference
2            description


ATZn        n=0-4            Modem reset

            Zn               Reset modem and load user profile n            S15b5

            Z4               Reset modem and load factory settings

AT$                          Help, Basic command summary

AT&$                         Help, Extended, Ampersand, command summary

AT*$                         Help, Extended, Star, command summary


EXTENDED "AT&" COMMAND SET

Command     Function and     Reference 
            description

&Bn                          Data rate, terminal-to-modem (DTE/DCE)         S28b6

            &B0              DTE rate follows connection rate         S44b6

            &B1  *           DTE/DCE rate fixed at DTE setting (see also S18, S44b6) 

            &Cn              Carrier Detect (CD) operations           S21b4

            &C0              Assume that the carrier is always on

            &C1  *           CD tracks presence of carrier (see also S38b3)            S38b3

&Dn                          Data Terminal Ready (DTR) operations

            &D0              Assume DTR is always on      S21b6

            &D1              DTR off-on transition causes dial of the default number
                             *Dn

            &D2  *           DTR off causes the modem to hang up

            &D3              DTR off causes the modem to hang up and reset the modem
                             from profile #0

&F                           Load Factory setting into RAM as active configuration

&Gn                          Guard tone

            &G0  *           No Guard tone, U.S., Canada        S28b4

            &G1              Reserved

            &G2              1800 HZ guard tone





EXTENDED "AT&" COMMAND SET

Command     Function and     Reference 
            description

&Hn                          Data flow control, DTE/DCE

            &H0              Flow control disabled        S27b3

            &H3  *           Hardware (CTS/RTS) flow control

            &H4              Software (XON/XOFF) flow control

&Jn                          Phone line type        S28b0

            &J0  *           Single phone line-RJ11 phone jack

            &J1              Multiple phone/modem lines RJ12 / RJ13 phone jack

&Kn                          Error control and data compression

            &K0              No error control       S27b0

            &K1              MNP4+MNP3 (see also S41b0)         S41b0

            &K2              MNP4+MNP5 (see also S38b5, S41b0)        S38b5

            &K3              V.42+MNP4

            &K4  *           V.42+V.42 bis (compatible with &K2)

&Ln                          Normal/Leased line operation

            &L0  *           Normal phone line      S14b2

            &L1              2 wire leased line

            &L2              4 wire leased line

&Mn                          Sync/Asynchronous

            &M0  *           Asynchronous mode with data buffering          S14b6

            &M1              Asynchronous command, synchronous data

            &M2              Direct asynchronous mode without data buffering

            &M3              Synchronous mode

&Nn                          Data Rate, Data Link (DCE/DCE)           S19

            &N0  *           Multi-Auto, auto negotiate highest possible link rate;
                             ZyX 19200 (Plus models only), ZyX 16800, V.32bis, V.32,
                             V.22bis, V.22 and Bell 212A, G3 Fax    S38b4 S43b0S43b1

            &N1              V.33 14000/12000                   

            &N2              V.33 12000

            &N3              V.32 9600T/9600/ 7200T/4800


EXTENDED "AT&" COMMAND SET

Command     Function and     Reference 
            description

            &N4              V.32 9600/7200T/4800            
      
            &N5              V.32 4800

            &N6              V.29 9600 (U1496 & U1496RN only)

            &N7              V.29 7200 (U1496 & U1496RN only)

            &N8              V.29 4800 (U1496 & U1496RN only)

            &N9              V.27ter 4800 (U1496 & U1496RN only)

            &N10             V.27ter 2400 (U1496 & U1496RN only)

            &N11             V.26 2400 (U1496 & U1496RN only)         S35b2

            &N12             V.23 1200/75           &N13        V.23 600/75

            &N14             V.22bis 2400/1200      &N15        V.22 1200

            &N16             V.21 300

            &N17             V.32bis 14400/12000/9600/7200/ 4800

            &N18             V.32bis 12000/9600/7200/4800

            &N19             V.32bis 7200/4800

            &N24             BELL 212A 1200         &N25        BELL 103 300

            &N32             ZyXEL FAX 14400/12000/9600/7200/ 4800/ 2400 (use S42
                             bit 4 to disable V.17, 14400)            S42b4

            &N34             ZyXEL 19200*           &N35        ZyXEL 16800*

            &N36             ZyXEL 14400*           &N37        ZyXEL 12000*             
            
            &N38             ZyXEL  9600*           &N39        ZyXEL  7200*
      
            &N42             CELL 14400**           &N43        CELL 12000**

            &N44             CELL  9600**           &N46        CELL  4800**

            &N47             CELL 4800C**           &N48        CELL 3600C**

            &N49             CELL 2400C**

*     note             all ZyXEL modes except ZyXEL 16800 a&N45   
                       CELL 7200T2 re only available with Plus models

**    note             all CELL modes are only available with ZyXEL's
                       Cellular option





EXTENDED "AT&" COMMAND SET

Command     Function and     Reference 
            description

&Pn                          Pulse dial make/break ratio        S23b2

            &P0  *           Pulse dial make/break ratio= 39% / 61%

            &P1              Pulse dial make/break ratio= 33% / 67%

&Rn                          RTS (Received Data hardware flow control) function
                             selection, used in synchronous mode only    S21b5

            &R0              CTS tracks RTS, response delay is set in S26

            &R1  *           Ignore RTS, assumes RTS always on

&Sn                          Data Set Ready (DSR)         S21b3

            &S0  *           DSR override, always on      S44b4

            &S1              According to CCITT, modem controls DSR         S41b5

&Tn                          Modem testing

            &T0              Terminate test in progress

            &T1              Initiate Analog Loopback test (ALB)

            &T3              Initiate Local Digital Loopback test (hardware test, LDL)

            &T4  *           Grant Remote Digital Loopback request from remote
                             modem       S14b1

            &T5              Deny Remote Digital Loopback request from remote modem


            &T6              Initiate Remote Digital Loopback test (RDL)

            &T7              Initiate Remote Digital Loopback with self test
                             (RDL+ST)

            &T8              Initiate Analog Loopback with self test (ALB+ST)

&Vn                          View profile settings

            &V0              View current active settings

            &Vn              View user profile # (n-1) settings

            &V5              View factory default settings

&Wn   n=0-3                  Write current settings to NVRAM at user profile #n S35b6








EXTENDED "AT&" COMMAND SET

Command     Function and     Reference 
            description

&Xn                          Synchronous timing source

            &X0  *           Modem provides synchronous transmit clock signal
                             (internal clock, applies to pin 15 of RS232D)             S14b4

            &X1              Terminal provides synchronous transmit clock signal
                             (external clock, applies to pin 24 of RS232D)

            &X2              Received carrier provides synchronous transmit clock
                             signal (Remote or Slave clock, applies to pin 15 of
                             RS232D)

&Yn                          Break handling, Destructive Breaks clear the buffer;
                             Expedited Breaks are sent iimmediately to the remote
                             system

            &Y0              Destructive, expedited       S28b2

            &Y1  *           Nondestructive, expedited

            &Y2              Nondestructive, unexpedited

&Zn=s       n=0-9            Write phone number s to NVRAM at position n, use
                             AT*Dn or ATS29=n to set default dial pointer              
                             *Dn   S29

&Z?                          Display the phone numbers stored in NVRAM



EXTENDED "AT*" COMMAND SET

Command     Function and     Reference
            description

*Bn                          Dial-backup       S35bn

            *B0  *           Disable dial-backup

            *Bn              Enable dial-backup and set dial-backup pointer at
                             telephone directory location (n-1)             S44b2

*Cn                          Character length

            *C0  *           10-bit character length      S15b3

            *C1              11-bit character length

            *C2              9-bit character length

            *C3              8-bit character length

*Dn         n=0-9      *0    Set default dial pointer at telephone directory
                             location n, use AT&Zn=s to store phone numbers            
                             S29bn &Zn


EXTENDED "AT*" COMMAND SET

Command     Function and     Reference
            description

*En                          Error control negotiation          S21b0

            *E0  *           If error control negotiation fails, keep the non-error
                             control connection

            *E1              If error control negotiation fails, terminate the call


*Fn                          Remote configuration         S36b0

            *F0  *           Deny remote configuration

            *F1              Accept remote configuration (Remote Digital Loopback
                             must be granted also, AT&T4)       &T4

*Gn                          Security function

            *G0  *           Disable security function          S36b5

            *G1              Enable type 1 security, with password check (ZyXEL to
                             ZyXEL only)

            *G2              Enable type 1 security, with password check and call-
                             back (ZyXEL to ZyXEL only)

            *G3              Enable type 2 security, with password check

            *G4              Enable type 2 security, with password check and call-
                             back

            *G5              Enable type 2 security, with password check and call-
                             back, remote site enter the call-back number

*HS                          Modify supervisory password

*Hn         n=0-9            Modify user password table at location n

*In                          Command set       S17b6
 3
            *I0  *           AT command set

            *I1              V.25bis command set

            *I2              Dumb mode

*Ln                          Panel lock function          S28b1

            *L0  *           Panel key normal

            *L1              Panel key locked

*Mn                          Leased line auto handshake

            *M0  *           Leased line auto handshake on Originate mode S14b0

            *M1              Leased line auto handshake on Answer mode

*Pn         n= 0-15 *9       Leased line transmission power level, set to
                             (-n )dBm,  n=0 to 15         S17b1S35b3

*Qn                          Action taken when line quality changes

            *Q0              No response to poor signal quality             S27b6

            *Q1              Retrain action taken if signal quality is poor            S41b2

            *Q2  *           Adaptive rate (auto fall-back / forward)

            *Q3              Disconnect for poor signal quality

*Rab                         Read remote configuration b to local profile a            S36b1

            a=0-3            Local user profile number a        S37b4

            b=0-3            Remote user profile number b       S37b0

            b=4              Remote current configuration

            b=5              Remote factory default

*Sn         *S0  *           Secondary channel disabled         S17b0

            *S1              Secondary channel enabled

*T                           Recall the last CND (Caller ID) information          S40b2

*V                           View password table

*Wab                         Write local user profile a to remote user profile b
                             and reset remote modem from profile b          S36b1

            a=0-3            Local user profile number a        S37b4

            a=4              Local active configuration

            a=5              Local factory default configuration

            b=0-3            Remote user profile number b       S37b0





FAX, CLASS 2 "AT+F" COMMAND SET

Command                      Function and description

+<command>= <value>          Execute a command or set a parameter

+<command>=?                 Read permissible setting

+<command>?                  Read current setting

+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

FAX, CLASS 2 "AT+F" COMMAND SET

Command                      Function and description

+FBOR=n                      Phase C data bit order

            n=0              Select direct bit order

            n=1              Select reversed bit order in receiving mode

+FCIG="string"               Local polling ID string

+FCLASS=n                    Service class selection

            n=0              Set to modem mode

            n=2              Set to Class 2 mode

            n=6              Set to ZFAX mode

            n=8              Set to Voice mode

+FCON                        DCE response, Fax connection made

+FCR=n                       Capability to receive parameter

            n=0              DCE will not receive message data or poll a remote

+FDCC=vr,br,wd, ln,          DCE capabilities parameters,
      df, ec, bf, st         refer to EIA pro.2388 for detail descriptions

+FDCS=vr,br,wd, ln,          Current session parameter,
      df, ec, bf, st         refer to EIA pro.2388 for detail descriptions

+FDIS=vr,br,wd, ln,          Current session negotiation
      df, ec, bf, st         parameters, refer to EIA pro.2388 for detail descriptions

+FDR                         Receive phase C data command, initiates document
                             reception

+FDT [=df,vr,wd,ln]          Transmit phase C data command, releases the DCE to
                             proceed with negotiation

+FET=n                       End the page or document command

            n=0              More page, same document

            n=1  EE          End of Document, another document next

            n=2              No more pages or documents

            n=4              Procedure interrupt, another page follow

            n=5              Procedure interrupt, another document follow

            n=6              Procedure interrupt, all done

+FLID="string"               Local ID string parameter

+FLPL=n     n=0              DTE has no document to poll

            n=1              DTE has a document ready for polling
FAX, CLASS 2 "AT+F" COMMAND SET

Command                      Function and description

+FMDL?                       Request DCE model

+FMFR?                       Request DCE manufacturer

+FPTS=n     n=1              Page good

            n=2              page bad; retrain requested

            n=3              Page good; retrain requested

            n=4              page bad; interrupt requested

            n=5              page good; interrupt requested

+FREV?                       Request DCE revision

+FSPL=n     n=0              DTE does not want to poll

            n=1              DTE can receive a polled document



FAX, ZyXEL "AT#" COMMAND SET

Command                      Function and description

#Bn                          "CONNECT FAX" result code enable or disable

            #B0  *           Disable, used in ZFAX mode, normal operation

            #B1              Enabled, for BBS fax receiving application, this
                             command also changes CONNECT 12000/ARQ to CONNECT
                             9600/ARQ.

                             This will also send out external mail string "ZyXEL" when
                             fax is connected, DCE will not send fax connection
                             parameters until <DC2> is received from DTE

            #B2              Enable Polling feature of Fax. Modem will send polling
                             signal to remote fax machine.

            #B3              Display ring cadence

#Cn                          Set minimun scan line time capability at the receiver

            #C0              20 ms at 3.85 line/mm, T(7.7)=T(3.85)

            #C1              5 ms at 3.85 line/mm, T(7.7)=T(3.85)

            #C2              10 ms at 3.85 line/mm, T(7.7)=T(3.85)

            #C3              20 ms at 3.85 line/mm,  T(7.7)=1/2T(3.85)

            #C4              40 ms at 3.85 line/mm,  T(7.7)=T(3.85)

            #C5              40 ms at 3.85 line/mm,  T(7.7)=1/2T(3.85)

            #C6              10 ms at 3.85 line/mm,  T(7.7)=1/2T(3.85)

            #C7              0 ms at 3.85 line/mm, T(7.7)=T(3.85)

#F                           Set the U-1496 into ZyXEL fax mode, same as "AT&N32"

#Ln                          Set maximum recording length

            #L0              Set maximum recording length, A4 (297mm)

            #L1              Set maximum recording length, B4 (364mm)

            #L2              Set maximum recording length, unlimited.

#P<string>                   Set the local ID string, 25 characters max.

#Rn                          Set recording width

            #R0              Set 1728 picture elements along a scan line length of
                             215mm

            #R1              Set 2048 picture elements along a scan line length of
                             255mm

            #R2              Set 2432 picture elements along a scan line length of
                             303mm

FAX, ZyXEL "AT#" COMMAND SET

Command                      Function and description

#Tn                          Coding Scheme

            #T0              Set to one dimensional coding scheme

            #T1              Set to two dimensional coding scheme

#Vn                          Vertical resolution

            #V0              Set to normal vertical resolution

            #V1              Set to high vertical resolution

Result      Code             (with #B0) CONNECT FAX/SnnnnVnTnRnLnCnP<string>

                             (with #B1) /SnnnnVnTnRnLnCnP<string>

                             DISCONNECTxP<string>

Snnnn                        First four digits of Fax connection speed

Vn                           Vertical resolution; n =0-1

Tn                           Coding scheme; n =0-1

Rn                           Recording width; n =0-2

Ln                           Recording length; n =0-2

Cn                           Scan time; n =0-7

x                            Disconnect with confirmation (x =0) or without (x =1)

P<string>                    Remote Fax number





VOICE, "AT+V" COMMAND SET

Command                      Function and description

+<command>= <value>          Execute a command or set a parameter

+<command>=?                 Read permissible setting

+<command>?                  Read current setting

+FCLASS=8                    Set modem to Voice mode

+VBT=n      n=0-255 *10      Set the DTMF tone generation duration at
                             0.1 sec. increments, used in conjunction with +VTS

VCON                         DCE reports Voice connection made

+VIP                         Initialize all the Voice parameters to factory default


VOICE, "AT+V" COMMAND SET


Command                      Function and description

+VLS=n                       Voice I/O device selection

            n=0              Disconnect all I/O devices

            n=2              Dial-up line jack

            n=8              External mic. (connect to Dial-up line jack)

            n=16             Connect to Internal Speaker

+VNH=n                       Automatic hang-ups disable or enable

            n=0              DCE shall not disable automatic hang-ups

            n=1              DCE shall disable automatic hang-ups with ATH0

            n=2              DCE shall disable automatic hang-ups without ATH0

+VRA=n      n=0-255 *70      Set length of time, in 0.1 sec. unit, to wait between
                             ringbacks before DCE assume remote station has gone
                             off hook 

+VRN=n      n=0-255 *57      Set length of time, in 0.1 sec. unit, to wait for
                             ringback before assume remote station has gone off hook

+VRX                         Start the voice reception process

+VSD=<sds>, <sdi>            Set the silence detection sensitivity and the required
                             period of silence

            <sds> *15        0-31, larger values imply that the DCE treats noisier
                             conditions as silence, 0 to disable silence detection

            <sdi> *70        0-255, in units of 0.1 second, required period of silence

+VSM=n                       Voice compression method selection

            n=1              9.6 Kbps CELP (Code Excited Linear Prediction), only
                             available in Plus(+) models

            *n=2             19.2 Kbps 2-bit ADPCM

            n=3              28.8 Kbps 3-bit ADPCM

+VTS=<string>                Cause DCE to produce DTMF and other tones

+VTX                         Start the voice transmission process



*     Manufacture default  (except when used  to represent "AT*" commands)

Snnbx       Cross reference to S-register nn bit number x

In Reference Column, "AT" is omitted when AT command is referred to


RESULT CODES OPTIONS TABLE

Result codes           Commands

ATV0  ATV1       AT    X0    X1    X2    X3    X4   X5    X6    X7

0     OK               V     V     V     V     V     V    V     V

1     CONNECT          V     V     V     V     V     @    $     #

2     RING**           V     V     V     V     V    V     V     V

3     NO CARRIER       V     V     V     V     V    V     V     V

4     ERROR            V     V     V     V     V    V     V     V

5     CONNECT 1200           %     %     %     %    @     $     #

6     NO DIAL TONE                 V           V    V     V     V

7     BUSY                         V     V     V    V     V

8     NO ANSWER                          V     V    V     V     V

9     RINGING*                     V     V     V    V     V

10    CONNECT 2400           %     %     %     %    @     $     #

11    CONNECT 4800           %     %     %     %    @     $     #

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          %     %     %     %    @





Use ATS35 bit 7 (ATS35.7=1) to enable the following numerical
result codes

When "NONE" error control connection is made, use the above table






Numerical   Connect speed                Numerical        Connect speed 
Code        with Error Correction        Code             with Error Correction
                                         
30          CONNECT                      35               CONNECT 9600

31          CONNECT 1200                 36               CONNECT 12000

32          CONNECT 2400                 37               CONNECT 14400

33          CONNECT 4800                 38               CONNECT 16800

34          CONNECT 7200                 39               CONNECT 19200

Note:

V     Supported

%     Reporting DTE rate

@     CONNECT DTE speed/Protocol Link speed/Error control level.
      Example:  CONNECT 38400/V.32bis 14400/V.42bis

$     CONNECT Link speed/Error control (ARQ),   
      Example:  CONNECT 14400/ARQ

#     CONNECT Link speed/ Error control (ARQ)/Data Compression.
      Example:  CONNECT 14400/ARQ/V.42b

**    When more than one type of Distinctive Ring is turned on
      (S40b3-6) "RINGn" will be reported, n = Ring Type#

*     Use S42b6 to disable "RINGING" result code

BASIC S-REGISTERS, "ATSn=x"

Command      +Default/       Function and description
            Reference

S0=         +000             Set the number of rings on which the modem will
                             answer.  0 value disable auto-answer           

S1=         +000             Counts and stores number of rings from an incoming
                             call        

S2=         +043             Define escape code character, default "+" (43 dec.)
      
S3=         +013             Define ASCII Carriage Return       

S4=         +010             Define ASCII Line Feed       

S5=         +008             Define ASCII Backspace       

S6=         +003             Set duration, in number of seconds, modem waits
                             before dialing, not applicable if X2-X6 is set            

S7=         +060             Set duration, in number of seconds, modem waits for a
                             carrier

S8=         +002             Set duration, in seconds, for pause (,) option in
                             Dial command and pause between command re-executions for
                             Repeat (>)command      

S9=         +006             Set duration, in tenths of a second, of remote carrier
                             signal before recognition (Ignored if in non-FSK or
                             half-duplex operation)       

S10=        +007             Set duration, in tenths of a second, modem waits
                             after loss of carrier before hanging up 

S11=        +070             Set duration and spacing, in milliseconds, of dialed
                             Touch-Tones 







EXTENDED S-REGISTERS, "ATSn=x"

Command     Function and description                                  +Default /Reference

S13=        bit  dec   hex   Bit-mapped register                                  +000

            1    2     2     Capture modem manufacturer information during V.42
                             handshake, can be displayed at ATI2 "Last Speed/Protocol"
                             line if available (Flash or ZyXEL stands for ZyXEL
                             connection)







EXTENDED S-REGISTERS, "ATSn=x"

Command     Function and description                                  +Default /Reference

S14=        bit  dec   hex   Bit-mapped register:                                 +002/*M0

            0    0     0     Auto-handshake on Originate mode in leased line
                             operation

                 1     1     Auto-handshake on Answer mode in leased line operation*M1

            1    0     0     Grant Remote Digital Loopback test                        &T4

                 2     2     Deny Remote Digital Loopback test                         &T5

            3,2  0     0     Dial-up line                                              &L0

                 4     4     2-wire leased line                                        &L1

                 8     8     4-wire leased line                                        &L2

            5,4  0     0     Internal clock                                            &X0

                 16    10    External clock                                            &X1

                 32    20    Remote clock                                              &X2

            7,6  0     0     Asynchronous data format                                  &M0

                 64    40    Asynchronous command, synchronous data                    &M1

                 128   80    Direct asynchronous no data buffering                     &M2

                 192   C0    Synchronous                                               &M3

S15=        bit  dec   hex   Bit-mapped register                                       +130

            0,1  0     0     Even parity

                 1     1     Odd parity

                 2     2     No parity

            2    0     0     1 stop bit

            4    4     2     stop bits

            4,3  0     0     10 bit character length                                   *C0

                 8     8     11 bit                                                    *C1

                 16    10    9 bit                                                     *C2

                 24    18    8 bit                                                     *C3

            7-5  0     0     Profile 0 as active settings after power on               Z0

                 32    20    Profile 1 as active settings after power on               Z1

                 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=        bit  dec   hex   Test status register                                      +000

                 0     0     No test in progress

                 1     1     Analog Loopback test in progress

                 3     3     Local Digital Loopback test in progress

                 6     6     Remote Digital Loopback test in progress

                 7     7     Remote Digital Loopback with self test in progress

                 8     8     Analog Loopback with self test in progress

S17=        bit  dec   hex   Bit-mapped register                                       +018

            0    0     0     Disable Secondary Channel                                 *Sn

                 1     1     Enable Secondary Channel                                  S42b0

            1-4  0-30 0-1E   Leased line transmission power level,  to attenuate 0 to
                             -15dB or -12 to -27dB when S35B3 is set                   *Pn
                                                                                       S35b3

            5    0     0     Normal dial

                 32    20    Reverse dial, answer mode on line                         DR

            6-7  0     0     AT command set                                            *In

                 64    40    V.25 bis command set

                 128   80    Dumb mode

S18=        bit  dec   hex   Force modem to fix baud rate when idle                    +000

            0    0     0     Disable fixed baud function                               &Bn

                 1-15 1-F    Enable baud rate fixing at idle, baud rate value settings
                             same as S20 value (dec) 1-15                              S44b6

S19=             0-36        hex 0-24    Modem type, same setting value as &Nn         +000
                                                                                       &Nn

S20=             dec   hex   DTE speed (bps).  Auto detected from AT command           +002

                 0     0     76800

                 1     1     57600       dec   hex  DTE

                 2     2     38400       9     9    4800

                 3     3     19200       10    A    3600

                 4     4     16800       11    B    2400

                 5     5     14400       12    C    1800

                 6     6     12000       13    D    1200

                 7     7     9600        14    E    600

                 8     8     7200        15    F    300

S21=        bit  dec   hex   Bit mapped register                                       +178

            0    0     0     Maintain non-error control connection when error
                             control handshake fails                                   *E0

                 1     1     Drop connection when error control handshake fails
                                                                                       *E1

            1-2  0     0     Speaker always Off                                        M0

                 2     2     Speaker On until carrier is detected                      M1

                 4     4     Speaker always On                                         M2

                 6     6     Speaker On after last digit is dialed 
                             out until carrier detected                                M3

            3    0     0     DSR always On                                             &S0

                 8     8     According to CCITT (see also S44b4, S41b5)                &S1

            4    0     0     CD always On                                              &C0

                 16    10    CD tracks presence of data carrier 
                             (see also S38b3)                                          &C1

            5    0     0     CTS follows RTS, in synchronous mode                      &R0

                 32    20    Ignore RTS (CTS always On), in synchronous mode           &R1

            6-7  0     0     Ignore DTR signal, assume DTR always On                   &D0

                 64    40    108.1, DTR Off-On transition causes dial of the default
                             number                                                    &D1

                 128   80    108.2 Data Terminal Ready, DTR Off causes the modem
                             to hang up and return to command state                    &D2

                 192   C0    108.2, DTR off causes the modem to hang up and reset the
                             modem to profile #0 after DTR dropped                     &D3
                                                    
S23=        bit  dec   hex   Bit mapped register                                       +105

            0    0     0     Command echo disabled                                     E0

                 1     1     Command echo enabled                                      E1

            1    0     0     Tone dial                                                 T

                 2     2     Pause dial                                                P

            2    0     0     Pulse dial make/break ratio=39% / 61%                     &P0

                 4     4     Pulse dial make/break ratio=33% / 67%                     &P1




            3-5  0     0     ATX0  (See result code table)

                 8     8     ATX1              dec        hex         AT

                 16    10    ATX2              40         28          X5

                 24    18    ATX3              48         30          X6

                 32    20    ATX4              56         38          X7

            6    0     0     Display result code in numeric format (see S35b7)         V0

                 64    40    Display result code in verbose format                     V1

            7    0     0     Modem returns result code                                 Q0

                 128   80    Modem does not return result code 
                             (see also S40b1)                                          Q1

S24=        bit  dec   hex   Bit mapped register                                       +138

            1-3  0-14  0-E   Ring volume control, increments of 2 in decimal           N0-7

            5-7  32-240 20- F0     Speaker volume control,                             32-240,
                                   increments of 32 in decimal value                   L0-7

S26=        0- 255           Set delay, in 10-millisecond units, between the 
                             RTS and modem's CTS response in synchronous mode          +000 
                                                                                       &Rn
            
S27=        bit  dec   hex   Bit mapped register                                       +156

            0-2  0     0     No error control                                          &K0

                 1     1     MNP4 + MNP3 (see also S41b0)                              &K1

                 2     2     MNP4 + MNP5 (see also S38b5, S41b0)                       &K2

                 4     4     V.42+MNP4                                                 &K3

                 6     6     V.42 + V.42bis (compatible with &K2)                      &K4

            3-5  0     0     Flow control disabled                                     &H0

                 24    18    Hardware (RTS/CTS) flow control                           &H3

                 32    20    Software (XON/XOFF) flow control                          &H4

                 40    28    Reserved                                                  &H5

            6,7  0     0     No response to poor signal quality                        *Q0

                 64    40    Retrain action taken if signal quality is poor            *Q1

                 128   80    Adaptive rate (auto fall-back / forward) when 
                             signal quality changes                                    *Q2 
                                                                                       S41b2

                 192   C0    Disconnect when signal quality is poor                    *Q3



S28=        bit  dec   hex   Bit mapped register                                       +068

            0    0     0     Single phone line, RJ-11 phone jack                       &J0

                 1     1     Multiple phones/modem lines, RJ-11/RJ13 phone 
                             jack                                                      &J1

            1    0     0     Panel key normal                                          *L0

                 2     2     Panel key locked                                          *L1

            2-3  0     0     Destructive, expedited break                              &Y0

                 4     4     Non-destructive, expedited break                          &Y1

                 8     8     Non-destructive, unexpedited break                        &Y2

            4-5  0     0     No guard tone                                             &G0

                 16    10    Reserved                                                  &G1

                 32    20    1800 Hz guard tone                                        &G2

            6    0     0     DTE/DCE rate follows line rate 
                             (see also S18,S41b6)                                      &B0

                 64    40    DTE/DCE rate fixed at DTE setting                         &B1

            7    0     0     Select V.22 for 1200 bps communication                    B0

                 128   80    Select Bell 212A for 1200 bps communication               B1

S29=             0-9   0-9   Set default dial phone number pointer,                    +000
                             use AT&Zn=s to store phone numbers                        *D

S30=             dec   hex   Bit mapped register                                       +000

                 0     0     Disable dial-backup                                       *Bn

                 1-10  1-10  Enable dial-backup, sets dial-backup phone #
                             pointer at location (n -1) in the EEPROM.                 S44b2

S31=             0-    255   Holds the ASCII decimal value of the XON                  +017

S32=             0-    255   Holds the ASCII decimal value of the XOFF                 +019


S34=             0-    255   Dial-Backup restoral look-back timer, in minutes          +030

S35=        bit  dec   hex   Bit mapped register                                       +000

            0    1     1     Reserved

            1    2     2     Disable aborting from terminal during modem handshaking

            2    4     4     V.26 alternative A                                        &N11

            3    8     8     Extend the attenuation of leased or 4W cellular 
                             line transmission power by -12dBm, add -12dBm to 
                             *Pn (S17b1) or S49 low 4 bits                             S17b1
                                                                                       *Pn

            4    16    10    When Data/Voice switch is pushed, modem will dial
                             the default number, only for U-1496E & U-1496R            *Dn  
                                                                                       S29

            5    32    20    Enable Selective Reject in V.42

            6    64    30    Enable password protection to profile saving, when
                             "AT&Wn" is issued, and the n profile in the memory
                             has this bit on, supervisory password will be 
                             requested &Wn

            7    128   60    Enable extended numerical result codes from 30-39
                             when an error correction connection is made, use 
                             with ATV0, see result code table V0                       S23b6

S36=        bit  dec   hex   Bit mapped register                                       +000

            0    0     0     Deny remote request for configuration                     *F0

                 1     1     Grant remote request for configuration                    *F1

            1    0     0     Write from local profile to remote profile                *Wab

                 2     2     Read from remote profile to local profile                 *Rab

            5-7              Security function control register

                             0     0     Disable security function                     *G0

                 32    20    Enable type 1 security, with password check (ZyXEL
                             to ZyXEL only)                                            *G1

                 64    40    Enable type 1 security, with password check and
                             call-back (ZyXEL to ZyXEL only)                           *G2

                 96    60    Enable type 2 security, with password check               *G3

                 128   80    Enable type 2 security, with password check and
                             call-back                                                 *G4

                 160   A0    Enable type 2 security, with password check and
                             call-back, remote site enter the call-back number         *G5

S37=        bit  dec   hex   Bit mapped register                                       +000

            0-3  0-5   0-5   0-5, remote profile number                                *Wab

            4-7  0-80        0-50        0-5, local profile number          *Rab

S38=        bit  dec   hex   Bit mapped register          +000

      0     1    1     Repeatedly dialing default number        *Dn 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  S21b4

      4     16   10    Auto-mode fax receiving disabled         &N0

      5     32   20    Disable MNP5      &Kn

S39=        bit  dec   hex   Bit mapped register          +000
      2     4    4     Answer in originating mode         ATA

      3     8    8     Class 2 Fax Bitfax compatibility:  +FCON at 2400 next
phase at 19200

      4     16   10    Class 2 Fax mode DTE shifting:  +FCON at current
DTE, shift to 19,200 when entering into the next phase

S40=        bit  dec   hex   Bit mapped register          +000

      1     2    2     No result code displayed in answer mode              Q2

      2     4    4     Enable Caller Number Delivery (see also S42 bit 2)
      S42b2 *T

      3     8    8     Distinctive Ring Type #1: 1.2/2 s on, 4 s off

      4     16   10    Distinctive Ring Type #2: 0.8 s on, 0.4 s off, 0.8
s on, 4 s off

      5     32   20    Distinctive Ring Type #3: 0.4 s on, 0.2 s off, 0.4
s on, 0.2 s off, 0.8 s on, 4 s off

      6     64   40    Distinctive Ring Type #4: 0.3 s on, 0.2 s off, 1 s
on, 0.2 s off, 0.3 s on, 4 s off

S41=        bit  dec   hex   Bit mapped register          +000

      0     1    1     Special MNP compatibility (see also S27b0, S38b5)
      &Kn

      1     0    0     Flag idle in V.25bis HDLC          *I1

            2    2     Mark idle in V.25bis HDLC          S17b6

      2     4    4     Disable retrain abort, up to 5 min. for special
satellite line condition           S27b6 *Qn

      3     8    8     Enable CCITT signals 140 and 141 on EIA-232D
interface

      4     16   10    In X2-X7 setting, modem waits for S6 seconds before
dialing and ignores dial tone detection

      5     32   20    DSR follows DCD and pulses (see also S44b4)          &Sn

      6     64   40    Force S0>=2       S0

      7     128  80    Ignore calling tone, not to be used as fax
detection

S42=        bit  dec   hex   Bit mapped register          +000

      0     0    0     Normal secondary channel, 75-2400 bps (U-1496,
U-1496RN)        S17b0

            1    1     Special secondary channel, fixed 2400 bps (U-1496,
U-1496RN)

      1     2    2     Reserved

      2     4    4     CND message will be forced on even if  ATQ2 is set
(see also S40 bit 2)         Q2  S40b2

      3     8    8     Disable escape sequence code in answer mode

      4     16   10    Disable V.17, 14,400 Fax in calling mode, no effect
to answering mode      &N32

      5     32   20    Disable Data/Voice button

      6     64   40    Disable "RINGING" result code            Xn

S43=        bit  dec   hex   Bit mapped register          +000

      0     1    1     Disable ZyXEL 16800 in Multi-Auto mode         &N0

      1     2    2     Disable ZyXEL 19200 in Multi-Auto mode

S44=        bit  dec   hex   Bit mapped register          +000

      2     4    4     Semi-auto dial backup, modem will wait for user's
confirmation from Front Panel before dialing attempt            *Bn  S30

      3     8    8     ATDSn initiates auto-dial of the stored numbers
consecutively until a connection is made            &Zn  S38b0

      4     16   10    DSR follows DTR (see also S41b5)         &Sn

      5     32   20    Enable V.13, half duplex simulation

      6     64   40    When select with &B0: DTE fixed at 19200 when the
link speed is above 9600, DTE  fixed at 9600 if link speed is
7200, otherwise, DTE follows link speed             &B0  S18

                       When Select with &B1: DTE fixed at current when an ARQ
connection is made, when non-ARQ connection is made, DTE follows
the logic as when &B0 is set       &B1

S49=        bit  dec   hex   Bit mapped register          +000

      0-3   0-15       0-F   Transmission power level setting, used only
with Cellular option, low 4 bits to attenuate 0 to 15dB               S35b3

      7     0    0     For Cellular only, modem is installed in office

      7     128  80    For Cellular only, modem is installed in mobil



In Reference Column, "AT" is omitted when AT command is referred
to

+nnn        Manufacture default, when listed in Reference Column

bit   S-register bit number, b,  used in ATSr.b=n, ATSr.b=?

dec   Decimal value, x, used in ATSn=x

hex   Hex value, h, used in U-1496 and U-1496R for setting
"STATUS REGISTER" manually from front panel




EIA-232D INTERFACE

DB25        Signal Flow       CCITT              EIA

Pin#  Signal Description              DTE          DCE       Signal   Signal1
      Protective Ground      --              101  AA

2     Transmit Data (TXD)          --         103  BA

3     Receive Data (RXD)     --         104   BB

4     Request To Send (RTS)        --         105  CA

5     Clear To Send (CTS)          --         106  CB

6     Data Set Ready (DSR)         --         107  CC

7     Signal Ground    --              102   AB

8     Carrier Detect (CD) (DCD)          --        109   CF

15    Synchronous Transmitter Timing           --        114   DB

17    Synchronous Receiver Timing        --        115   DD

18    Local Analog Loopback test         --        141

20    Data Terminal Ready (DTR)          --        108/2 108/1       CD

21    Remote Digital Loopback test       --        140

22    Ring Indicator (RI)          --         125  CE

24    Synchronous Transmitter Timing           --        113   DA

25    Test Indicator         --         142



ZFAX / RCVFAX COMMAND LINE OPTION



ZFAX [cmdtype  cmdoptions] [options]

cmdtype:               cmdoptions Format:

      0-TSR ZFAX             zfax 0

      1-Send Fax                   zfax 1 filename dest.faxnum

      2-Print Fax                  zfax 2 filename

      3-Convert File         zfax 3 filename dest.file

      4-View Fax                   zfax 4 filename

      5-Poll Fax                   zfax 5 dest.faxnum

      6-Send Message         zfax6 filename dest.phone num.

options:

/?    Display this help screen

/u    Remove TSR

/c:#  COM port number, 0-6

/r:#  Page Resolution, 0-1

/f:#  Dest.file format, 0-3

/t:#  Printer type, 0-7

/p:#  Printer port, 0-2

/g:#  Graphic device, 0-4

/n:#  Language Code, 0-4



RCVFAX cmdtype [options]

cmdtype:               Format:

      0-Background rcvfax    rcvfax 0

      1-Answer and rcvfax    rcvfax 1

      2-Receive fax data only      rcvfax 2

options:

/?    Display this help screen

/s    Stop the TSR temporarily

/g    Resume the TSR after an /s operation

/u    Remove the TSR if possible

/p:#  COM port number, #=0-3

/r:#  Answer after # of ring(s), #=0, not to auto-answer

      Hot key: Left-Shift + Tab to manual answer









Async. Hardware Flow Control Cable Connection

   Modem                DTE  DCE(Null)     MAC      NeXT 68040

(DCE)DB25     Signal    DB 9           DB25     Mini 8          Mini 82     TXD   3
      3     3    3
3     RXD   2    2     5     5

4     RTS   7    5     1     6

5     CTS   8    4     2     8

6     DSR   6    20

7     Ground     5     7     4,8   4

8     CD(DCD)    1     20          2

20    DTR   4    6,8   1     1

22    RI    9





ZyXEL



U-SERIES

HIGH SPEED MODEM/FAX

with VOICE

QUICK-REFERENCE GUIDE





            U-1496           U-1496 plus

            U-1496E    U-1496E plus

            U-1496R    U-1496RN

            U-1496B    U-1496B plus

U-1496C













ZyXEL

4920 East La Palma Avenue

Anaheim, California  92807

Tel: 714-693-0808

Fax: 714-693-8811

Tech. Support: 714-693-0808

BBS Tech. Support: 714-693-0762

(Rev qr600/atqr600.sam, 04/01/1993)ZyXEL



U-SERIES

HIGH SPEED MODEM/FAX

with VOICE

QUICK-REFERENCE GUIDE





            U-1496           U-1496 plus

            U-1496E    U-1496E plus

            U-1496R    U-1496RN

            U-1496B    U-1496B plus

U-1496C













ZyXEL Communications Corp.

2F., 58 Park Avenue II

Science-Based Industrial Park

Hsinchu, Taiwan 30077 R.O.C.

Tel: 886-3578-3942

Fax: 886-3578-2439

BBS Tech. Support: 886-3578-7045

(Rev qr506/atqr506.sam, 02/08/1993)





COM port

  0   com1 irq4

  1   com2 irq3

  2   com3 irq4

  3   com4 irq3

  4   com3 irq5

  5   com4 irq2

  6   user def.

Page Res.

  0   Normal

  1   High



Dest.file

  0   FAX

  1   PCX

  2   TIFF

  3   PRN





Printer type

  0   Epson FX

  1   Epson LQ

  2   HP II Let.

  3   HP II Leg.

  4   HP II A4

  5   HP III Let.

  6   HP III Leg   7   HP III A4

Prt. Port

  0   Lpt 1

  1   Lpt 2

  2   Lpt 3





Graphic dev.

  0   Auto Det.

  1   VGA

  2   EGA

  3   CGA

  4   Hercules





Language

  0   English

  1   Chinese

  2   Chinese II

  3   Germany

  4   Italian





 
