             Appendix C to ZyXEL Elite 2864I User's Manual

                        Quick Reference Guide

                   For Firmware Version 2.0 and Up

                                  
  BASIC 'AT' COMMAND SET

  Command             Function & Description                             Ref.

  A/                  Re-execute the last command once.
  A>                  Re-execute the last command once or repeat the
                      last call up to 9 times. (See also S8)
  <any key>           Terminate current connection attempt when enter
                      in handshaking state.
  +++                 Escape sequence code, entered in data state, wait
                      for modem to return to command state.
  ATA                 Go on-line in answer mode. (See also S39b2, S43b6)

  ATBn    Bn          For internal modem: Handshake option              S28b7
          B0      *   Select CCITT V.22 for 1200 bps communication
          B1          Select Bell 212A standard for 1200 bps
  ATBnn               Select ISDN Teleservice                        S82,S102
                      'B' must be followed by two digits.
          B0n         X.75 :
          B00         X.75 Transparent
          B01         X.75 T.70
          B04         BTX (Datex-J)
          B10         V.110 User rate follows DTE speed (async)
                      User rate determined by in-band negotiation (sync)
          B13         V.110 user rate = 2400 bps                         S117
          B14         V.110 user rate = 4800 bps
          B15         V.110 user rate = 9600 bps
          B16         V.110 user rate = 14400 bps
          B17         V.110 user rate = 19200 bps
          B18         V.110 user rate = 38400 bps (async only)
          B19         V.110 user rate = 57600 bps (async only)
          B20         V.120
          B40         PPP async to sync conversion
          B41         SLIP to sync HDLC conversion
  ATCBn   n=0-1       Configuration of embedded protocol analyzer       S84b1
          CB0         Disable the capture of B channel protocols
          CB1         Enable the capture of B channel protocols
  ATCCn   n=0-1       Configuration of embedded protocol analyzer       S84b0
          CC0         Disable the capture of DTE-DCE interface
                      protocols
          CC1         Enable the capture of DTE-DCE interface
                      protocols
  ATCDn   n=0-1       Configuration of embedded protocol analyzer       S84b2
          CD0         Disable the capture of D channel protocols
          CD1         Enable the capture of D channel protocols
  ATCE                dynamic bundling function for CFos
  ATCH?               Display the accumulated charging unit of the
                      last call.
  ATCI<prefix>        Prefix number string to be added to the
                      Calling-party-number before indicating to the
                      DTE when the type of number denotes
                      international.
  ATCK<DES_key>       Set the key for DES (Data Encryption Standard)
  ATCLn   n=0-2048    Maximum size of user data in a packet (number
                      of bytes)
  ATCL?               Enquire current setting of ATCLn
  ATCN<prefix>        Prefix number string to be added to the
                      Calling-party-number before indicating to the
                      DTE when the type of number denotes national.
  ATCPn   n=0-1       Loopback 4 control                                S83b0
          CP0         Disable Loopback 4
          CP1         Enable Loopback 4
  ATCRn   n=0-3   *0  Resumes a previoully suspended call, n is the
                      call identifier(Europe)
  ATCSn   n=0-3   *0  Suspend a call, n is the call identifier(Europe)
  ATCT                Clear buffer and start the embedded protocol
                      analyzer. Capture data immediately and start
                      timer.
  ATC$                Invoke the interpretation function of the
                      embedded protocol analyzer and display the
                      results on DTE
  ATDs                Dial s (number and options) that follows (see
                      also S38b0, S35b4). The options of s are listed
                      as follows :
          ,           Pause for a time specified in S6. Remaining
                      digits will be dialed as in-band DTMF.
          W           Wait for second dial tone. Remaining digits
                      will be dialed as in-band DTMF.
                      <ISDN numbering options>
          Y0      *   Unknown type of number
          Y1          International number
          Y2          National number
          Y3          Network specific number
          Y4          Subscriber number
          Y6          Abbreviated number
          Z0      *   Type of subaddress - NSAP with AFI=$50, IA5
                      characters
          Z2          Type of subaddress - user specified, IA5
                      characters
          N0      *   Unknown numbering plan
          N1          ISDN/Telephony numbering plan (CCITT E.164/
                      E.163)
          N3          Data numbering plan (CCITT X.121)
          N8          National standard numbering plan
          N9          Private numbering plan
          /           Called party subaddress delimeters
          A           Don't care (no Called Party Number information
                      element in the output SETUP message/ coming
                      call with any Called Party Number will be
                      granted)
  The format of s will be :
          [[Yn][Nn]called_party_Number][[W][,]]inband_dtmf_number
       or [[Yn][Nn]called_party_Number][/[Zn]called_party_subaddress/]
       or [A][/[Zn]called_party_subaddress/]

  ATDBs               Dial s (number and options) that follows
                      for the a/b adapter
  ATDIs               Dial s (number and options) that follows
                      for ISDN data call
  ATDL                Repeat last ATD command
  ATDMs               Dial s (number and options) that follows
                      for the internal fax/modem
  ATDSn   n=0-39      Dial number stored in NVRAM at location 'n'.      S44b3
  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) the modem or ISDN, same as 'ATH'
          H3          Hang up the a/b adapter
  ATIn                Display inquired information
          I0          Display product code, same as 'ATI'.
                      Results: 28641           (USA)
                               28642           (DSS1)
                               28643           (1TR6)
          I1          Display product information and ROM checksum
                      Results: Elite 2864I <switch>: V x.xx
                               Internal fax/modem: V x.xx
                               <checksum>
                      where <switch>= USA, DSS1, or 1TR6
          I2          Display link status report of internal fax/modem
          I3          Display link status report of ISDN call
  ATLn    n=0-7  *4   Speaker volume control.The higher the value     S24b5-7
                      ,the higher the volume.
  ATMn                Speaker control.                                S21b1-2
          M0          Speaker always OFF.
          M1  *       Speaker ON until carrier is detected.
          M2          Speaker always ON.
          M3          Speaker ON after the last digit is dialed
                      out and OFF when carrier is detected.
  ATNn    n=0-7  *5   Ring volume control.'N0' will disable           S24b0-2
                      the ring function.
  ATO                 Return to on-line state
  ATO1                Force modem to request a retrain.
  ATPn    n=0-6       D-channel protocol selection(USA)                   S86
                      for American Version
          P0  *       Northern Telecom proprietary ISDN
          P1          National ISDN 1(1 SPID)
          P2          National ISDN 1(2 SPID)
          P3          reserved
          P4          AT&T proprietary point-to-point
          P5          AT&T proprietary point-to-multipoint(1 SPID)
          P6          AT&T proprietary point-to-multipoint(2 SPID)
  ATQn                Result code displayed                             S23b7
          Q0  *       Modem returns result code.
          Q1          Modem does not return result code.
          Q2          Modem returns result code but quiet after         S40b1
                      answering on a RING. (will not show in AT&Vn)
  ATSr.b=n            Set bit 'b' of S-register 'r' to value 'n'.
                      'n' is a binary digit '0' or '1'.
  ATSr.b?             Display value of bit 'b' of S-register 'r'.
  ATSr=n              Set S-register 'r' to value 'n'. 'n' must be a
                      decimal number between 0 and 255.
  ATSr?               Display value stored in S-register 'r'.
  ATSPIDr=nnn...      User enters Service Profile ID nnnn...(USA)
          SPID0       First SPID number
          SPID1       Second SPID Number, if any
  ATSPID?             Display the SPID setting(s)
  ATT                 Repeat last user-to-user information(Europe)
  ATTn<string>        The <string> will be sent to the called party
                      via an User-to-user information element in the
                      next message. Characters other than the alpha-
                      numerical values can be represented by <nnn>
                      in the string, where nnn is the unsigned value
                      of the character. The maximum number of
                      characters in the string is 31 for ETSI.
          T0          User-specific protocol
          T1          OSI high layer protocol
          T2          X.244
          T3          Reserved for system management convergence
                      function
          T4   *      IA5 characters
          T7          ITU-TS Recommendation V.120 rate adaption
          T8          Q.931 user-network call control message
  ATUPX               Download firmware to the Flash EPROM
  ATVn                Verbal/Numeric result codes.                      S23b6
          V0          Display result code in numeric form. (See also
                      S35b7 and the result code table of 'ATXn')
          V1 *        Display result code in verbose form.
  ATXn    n=0-7  *5   Result code options, see the Options Table      S23b3-5
  ATZn    n=0-4       Reset modem and set power-on profile.           S15b5-7
          Zn          Reset modem and load user profile n (0-3).
          Z4          Reset modem and load factory settings.
  AT$                 Basic command summary help


  EXTENDED 'AT&' COMMAND SET
  Command             Function & Description                             Ref.

  &Bn                 Data rate, terminal-to-modem. (DTE/DCE)           S28b6
          &B0         DTE rate follows connection rate.
                      (See also S44b6)
          &B1  *      DTE/DCE rate fixed at DTE setting (See also S18,
                      S20, and S44b6)
  &Cn                 Carrier Detect (CD) options                       S21b4
          &C0         CD always ON (See also S42b7)
          &C1  *      CD tracks presence of carrier.
                      (See also S38b3, S42b7)
  &Dn                 Data Terminal Ready (DTR) options.              S21b6-7
                      (See also S25)
          &D0         Ignore DTR signal, assume DTR is always ON.
          &D1         108.1, DTR OFF-ON transition causes dial of the
                      default number.  (See also 'AT*Dn' and S48b4)
          &D2  *      108.2, Data Terminal Ready, DTR OFF causes the
                      modem to hang up.
          &D3         Same as &D2 but DTR OFF causes the modem to
                      hang up and reset from profile 0.
  &En                 B channel line speed for ISDN data call          S118b2
          &E0  *      64Kbps
          &E1         56Kbps (Default for American ISDN)
  &F                  Load factory settings to RAM as active
                      configuration.
  &Gn                 Guard tone options (for internal fax/modem)     S28b4-5
          &G0  *      No guard tone (within USA, Canada).
          &G2         1800 Hz guard tone.
  &Hn                 Data flow control, DTE/DCE.                     S27b3-5
          &H0         Flow control disabled.
          &H3  *      Hardware (CTS/RTS) flow control.
          &H4         Software (XON/XOFF) flow control.
  &Jn                 Bundle selection (See also S100)                S87b5-6
          &J0  *      Bundle connection is disabled
          &J1         Bundle connection is enabled in answer
                      mode only
          &J2         Bundle connection is enabled in call
                      mode only
          &J3         Bundle connection is enabled in both
                      directions
  &Kn                 Modem error control and data compression.       S27b0-2
          &K0         No error control.(Same as AT&K)
          &K1         MNP4 (See also S41b0).
          &K2         MNP4+MNP5 (See also S38b5, S41b0).
          &K3         V.42+MNP4.
          &K4  *      V.42+V.42bis, compatible with &K2 (See also S38b5).
  &Knn                ISDN data compression control
                      &K must be followed by two digits
                      V.42bis switch of the ISDN data call              S83b2
          &K00        Disable V.42bis (or disable reliable PPP)
          &K44        Enable V.42b s
  &Ln                 Modem and a/b adaptor address ambiguity           S84b5
                      resolution
          &L0         A/B adaptor first
          &L1         Fax/Modem first
  &Nn                 Modem link mode options (DCE/DCE).                  S19
                      (See also S43b7, S48b1)
          &N0  *      Multi-Auto, auto negotiate highest possible link
                      rate: V.34, ZyX 19200, ZyX16800, V.32bis, V.32,
                      V.22bis, V.22 and Bell 212A, G3 Fax
                      V.17/V.29/V.27ter and cellular modes. (See
                      also S38b4, S43b0, S43b1, S43b3 and S48b5)
          &N1         V.33 14400/12000 (models with 4-wire leased
                      line only).
          &N2         V.33 12000 (models with 4-wire leased line only).
          &N3         V.32 9600T/9600/7200T/4800
          &N4         V.32 9600/7200/4800
          &N5         V.32 4800
          &N6         V.29 9600 (models with 4-wire leased line only).
          &N7         V.29 7200 (models with 4-wire leased line only).
          &N8         V.29 4800 (models with 4-wire leased line only).
          &N9         V.27bis 4800 (models with 4-wire leased line only).
          &N10        V.27bis 2400 (models with 4-wire leased line only)
          &N11        V.26bis 2400 (4-wire leased line or 2-wire
                      half-duplex).(See also S35b2, S39b5)
          &N12        V.23 1200/75 (See also S48b3, S52b7).
          &N13        V.23 600/75 (See also S52b7).
          &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        G3 Fax V.17/V.29/V.27ter
                      14400/12000/9600/7200/4800/2400 (See also 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
          &N45        CELL 7200
          &N46        CELL 4800T
          &N62        V.34 28800
          &N63        V.34 26400
          &N64        V.34 24000
          &N65        V.34 21600
          &N66        V.34 19200
          &N67        V.34 16800
          &N68        V.34 14400
          &N69        V.34 12000
          &N70        V.34 9600
          &N71        V.34 7200
          &N72        V.34 4800
          &N73        V.34 2400
  &On                 Set default call type for conventional dialing  S83b4-5
                      commands
          &O0         ATDs, ATDPs, and ATDTs default to make fax/modem
                      calls
          &O2         ATDs, ATDPs, and ATDTs default to make ISDN
                      data calls
          &O3         ATDs, ATDPs, and ATDTs default to make calls
                      for the a/b adapter
  &Sn                 Data Set Ready (DSR) function selection.          S21b3
          &S0  *      DSR overridden, DSR always ON.
          &S1         DSR according to CCITT (ITU-TSS).
                      (See also S41b5, S44b4)
  &Tn                 Modem testing.
          &T0         Terminate test  in progress.
          &T1         Initiate Analog LoopBack (ALB) test.
          &T8         Initiate Analog LoopBack with self test (ALB+ST)
          &T9         Initiate ISDN loopback test
          &T10        Initiate ISDN loopback with self test
  &Vn                 View profile settings.
          &V0         View current active settings.
          &Vn         View the (n-1)th user profile settings (n=1-4)
          &V5         View factory default settings.
          &V6         View a/b adapter's setting
  &Wn     n=0-3       Write current settings to user profile n in
                      NVRAM.  (See also S35b6)
  &Yn                 Break handling.  (Destructive Break clears      S28b2-3
                      the buffer.  Expedited Break is sent
                      immediately to the remote system.)
                      For internal modem only
          &Y0         Destructive, expedited.
          &Y1  *      Nondestructive, expedited.
          &Y2         Nondestructive, unexpedited.
  &Zn=s   n=0-39      Write phone number s to NVRAM at location n
                      (n=0-39) use AT*Dn or ATS29=n to set the
                      default dial pointer.
  &ZIn=s  n=0-7       Assign the phone number (including
                      subaddress, if any) for various B-channel
                      protocols. In answer mode, these numbers
                      will be compared with the received called
                      party number and called party subaddress
                      information. The call will be accepted using
                      the specific protocol if the assigned number
                      of this protocol matches with the called
                      party number.
          &ZI0=s      Assign the phone number for X.75
          &ZI1=s      Assign the phone number for V.110
          &ZI2=s      Assign the phone number for V.120
          &ZI3=s      Assign the phone number for PPP async to
                      sync HDLC
          &ZI4=s      Assign the phone number for SLIP to sync
                      HDLC
          &ZI6=s      Assign the phone number for internal
                      fax/modem
          &ZI7=s      Assign the phone number for the a/b adapter
  &ZI?                Display the phone number (including subaddress
                      , if any) for various B-channel protocols
  &ZOx=s              Write own phone number (including
                      subaddress, if any). The number specified by
                      &ZOx will be used as the calling party number
                      while dialing
                      x = M(fax/modem), I(ISDN), or B(a/b adapter)
  &ZO?                Display the own phone numbers assigned via
                      the AT&ZOx=s command
  &Z?                 Display all the phone numbers stored in NVRAM.


  EXTENDED 'AT*' COMMAND SET
  Command             Function & Description                             Ref.
  *Cn                 Character length, including start, stop         S15b3-4
                      and parity bit.
          *C0  *      10-bit character length.
          *C1         11-bit character length.
          *C2         9-bit character length.
          *C3         8-bit character length.
  *Dn     n=0-39      Set default dial pointer at telephone               S29
                      directory location n.
          *D0  *      (See also S35b4 and S38b0)
  *En                 Internal modem error control negotiation.         S21b0
          *E0  *      if error control negotiation fails, keep the
                      non-error control connection.
          *E1         If error control negotiation fails,
                      disconnect the call (hang-up).
  *Qn                 Action taken when line quality changes.         S27b6-7
          *Q0         No action to poor signal quality.
          *Q1         Retrain action taken if signal quality is
                      poor.  (See also S41b2)
          *Q2  *      Adaptive rate, automatic fall-back or forward.
          *Q3         Disconnect if signal quality is poor.
  *T                  Recall the last CND (Caller ID) information.

  For 'AT+F' and 'AT+V' commands, please refer to the Quick Reference Guide
  of the 2864 series modem.

  BASIC S-REGISTERS, 'ATSn=x'
  Command     Function & Description                               +Def./Ref.

  S0=         Set the number of rings on which the modem will
              answer.  0 value disable auto-answer                       +000
  S1=         Counts and stores number of rings from an
              incoming call                                              +000
  S2=         Define escape code character, default <+> (43
              dec.)                                                      +043
  S3=         Define ASCII Carriage Return                               +013
  S4=         Define ASCII Line Feed                                     +010
  S5=         Define ASCII Backspace                                     +008
  S7=         Set duration, in number of seconds, modem waits
              for a carrier                                              +060
  S8=         Set duration, in seconds, for pause (,) option in
              Dial command and pause between command
              re-executions for Repeat (>)command                        +002
  S9=         Set duration, in tenths of a second, of remote
              carrier signal before recognition (Ignored if in
              non-FSK or half-duplex operation)                          +006
  S10=        Set duration, in tenths of a second, modem waits
              after loss of carrier before hanging up                    +007
  S11=        Set duration and spacing, in milliseconds, of
              dialed Touch-Tones                                         +070
  S12=        Reserved

  EXTENDED S-REGISTERS, 'ATSn=x'
  Command         Function and description                         +Def./Ref.

  S13=    bit     dec     hex     Bit-mapped register                    +000
                                  (for internal fax/modem only)
          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)
  S14=    bit     dec     hex     Bit-mapped register:                   +002
          0       0       0       Modem auto-handshake on Originate mode
                  1       1       Modem auto-handshake on Answer mode
  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                     &T0
                  For internal fax/modem only:
                  1       1       Loopback test in progress               &T1
                  8       8       Loopback with self test in progress     &T8
                  For ISDN data call only:
                  9       9       Loopback test in progress               &T9
                  10      A       Loopback with self test in progress    &T10
  S18=            dec             Force modem to fix baud rate when idle +000
                  0          *    Disable fixed baud function
                  n+1             Enable baud rate fixing at idle, n=0-15
                                  baud rate value settings (n) the
                                  same as S20 value
  S19=            dec     hex     Modem connection mode, same        +000/&Nn
                  0-73    0-49    setting value as 'AT&Nn' command
  S20=            dec     hex     DTE speed (bps).  Auto detected from
                                  AT command                             +003
                  0       0       230400
                  1       1       115200         dec     hex     DTE speed
                  2       2       76800          9         9        9600
                  3       3       57600          10        A        7200
                  4       4       38400          11        B        4800
                  5       5       19200          12        C        2400
                  6       6       16800          13        D        1200
                  7       7       14400          14        E        460800
                  8       8       12000          15        F        300
  S21=    bit     dec     hex     Bit mapped register                    +178
          0       0       0       Maintain non-error control connection   *E0
                                  when modem error control handshake fails
                  1       1       Drop connection when modem error        *E1
                                  control handshake fails
          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    M3
                                  out until carrier detected               
          3       0       0       DSR always On                           &S0
                  8       8       According to CCITT (see also S44b4,     &S1
                                  S41b5)                                  
          4       0       0       CD always On                            &C0
                  16      10      CD tracks presence of data carrier      &C1
                                  (see also S38b3)                        
          6-7     0       0       Assume DTR always On                    &D0
                  64      40      108.1, DTR Off-On transition causes     &D1
                                  dial of the default number              
                  128     80      108.2 Data Terminal Ready, DTR Off      &D2
                                  causes the modem to hang up and return
                                  to command state                        
                  192     C0      108.2, DTR off causes the modem to      &D3
                                  hang up and reset the modem to profile
                                  #0 after DTR dropped                    
  S23=    bit     dec     hex     Bit mapped register                    +105
          0       0       0       Command echo disabled                    E0
                  1       1       Command echo enabled                     E1
          2       0       0       Insertion is not allowed during a
                                  phone call
                  4       4       Insertion is allowed during a phone
                                  call
          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    V0
                                  (see S35b7)                              
                  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   Q1
                                  also S40b1)                              
  S24=    bit     dec     hex     Bit mapped register                    +138
          0-2     0-7     0-7     Ring volume control, increments of 1   N0-7
                                  in decimal                             
          4-6     16-119          0x10- 0x70  Speaker volume control,    L0-7
                                  increments of 16 in decimal value      
  S25=            0-255   0-FF    Detect DTR Change in &M1 mode          +000
                                  immediately after establishment of
                                  connection: determines how many
                                  seconds delay between connection and
                                  examination of DTR, allowing
                                  ISDN/modem to be moved without
                                  disconnecting call.
  S27=    bit     dec     hex     Bit mapped register                    +156
          0-2                     For internal fax/modem:
                  0       0       No error control                        &K0
                  1       1       MNP4 + MNP3 (see also S41b0)            &K1
                  2       2       MNP4 + MNP5 (see also S38b5, S41b0)     &K2
                  3       3       V.42+MNP4                               &K3
                  4       4       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                     For internal fax/modem:
                  0       0       No response to poor signal quality      *Q0
                  64      40      Retrain action taken if signal quality  *Q1
                                  is poor                                 
                  128     80      Adaptive rate (auto fall-back /         *Q2
                                  forward) when signal quality changes  S41b2
                  192     C0      Disconnect when signal quality is poor  *Q3
  S28=    bit     dec     hex     Bit mapped register                    +068
          0                       reserved
          4-5     0       0       No guard tone                           &G0
                  16      10      Reserved                                &G1
                  32      20      1800 Hz guard tone                      &G2
          7       0       0  *    Select V.22 for 1200 bps communication
                  128     80      Select Bell 212A for 1200 bps
                                  communication
  S29=            0-39    0-39    Set default dial phone number pointer, +000
                                  use AT&Zn=s to store phone numbers       *D
  S31=            0-255    0-FF   Holds the ASCII decimal value of the   +017
                                  XON                                    
  S32=            0-255    0-FF   Holds the ASCII decimal value of the   +019
                                  XOFF                                   
  S35=    bit     dec     hex     Bit mapped register                    +000
          7       128     60      Enable extended numerical result codes   V0
                                  from 50-71 when an error correction   S23b6
                                  connection is made, use with ATV0, see
                                  result code table                   
  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  &C1 S21b4
                                  standard, DCD high before connect
                                  message is sent, DCD off after last
                                  DCE response is sent         
          4       16      10      Auto-mode fax receiving disabled        &N0
          5       32      20      Disable MNP5                            &Kn
  S39=    bit     dec     hex     Bit mapped register                    +000
                                  (for internal fax/modem only)
          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       Q2
                                  mode                                     
  S41=    bit     dec     hex     Bit mapped register                    +000
                                  For internal fax/modem:
          0       1       1       Special MNP compatibility (see also     &Kn
                                  S27b0, S38b5)                           
          2       4       4       Disable retrain abort, up to 5 min.   S27b6
                                  for special satellite line condition    *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    &Sn
                                  S44b4)                                  
          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
          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
          7       128     80      DCD forced on but pulse off for 0.5     &C0
                                  seconds at carrier loss                 
  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
          3       8       8       ATDSn initiates auto-dial of the        &Zn
                                  stored numbers consecutively until a  S38b0
                                  connection is made                 
          4       16      10      DSR follows DTR (see also S41b5)        &Sn

  S80=    bit     dec     hex     Bit-mapped register:                   +000
          4      *0       0       Not sending Low Layer Compatibility
                                  information for internal fax/modem
                  16      10      Sending Low Layer Compatibility
                                  for internal fax/modem
          6      *0       0       Not sending Low Layer Compatibility
                                  information for ISDN data call
                  64      40      Sending Low Layer Compatibility
                                  for ISDN data call
          7      *0       0       Not sending Low Layer Compatibility
                                  information for a/b adapter
                  128     80      Sending Low Layer Compatibility
                                  for a/b adapter
  S82=                            ISDN B channel protocol                  Bn
                  60              V.120 64000
                  61              V.120 56000
                  62              X.75  64000 Transparent
                  63              X.75  56000 Transparent
                  64              X.75  64000 T.70
                  65              X.75  56000 T.70
                  70              X.75  64000 BTX
                  71              X.75  56000 BTX
                  72              V.110 64000
                  73              V.110 56000
                  74              PPP async to sync 64K
                  75              PPP async to sync 56K
                  76              SLIP to sync HDLC conversion 64K
                  77              SLIP to sync HDLC conversion 56K
  S83=    bit     dec     hex     Bit-mapped register:                   +000
          0       0       0       Disable loopback 4 test                 CP0
                  1       1       Enable loopback 4 test                  CP1
          2       0       0       ISDN without V.42bis                   &K00
                  4       4       ISDN with V.42bis if applicable        &K44
          4-5     0       0  *    ATDs, ATDPs, and ATDTs is mapped        &O0
                                  to ATDMs
                  32      20      ATDs, ATDPs, and ATDTs is mapped        &O2
                                  to ATDIs
                  48      30      ATDs, ATDPs, and ATDTs is mapped        &O3
                                  to ATDBs
  S84=    bit     dec     hex
          0-2                     Embedded protocol analyzer control      CCn
          0       1       1       Capture DTE-DCE interface protocol
                                  information
          1       2       2       Capture the B-channel (X.75 or V.120)
                                  frames
          2       4       4       Capture the D-channel protocol
                                  information
          3       0      *0       Display S register value in decimal
                                  format
                  8       8       Display S register value in hex format
          4      *0       0       Indicate Caller ID after the 1st RING
                                  message
                  16      10      Disable Caller ID indication
          5       0       0       Ambiguity resolution bit, A/B adaptor   &L0
                                  first                                   
                  32      20      Ambiguity resolution bit, Fax/Modem     &L1
                                  first                                   
  S86=            dec     hex     D-channel protocol selection(USA)        Pn
                                  The following number is valid for
                                  American version:
                  0       0       Northern Telecom proprietary ISDN
                  1       1       National ISDN 1 (1 SPID mode)
                  2       2       National ISDN 1 (2 SPIDs mode)
                  3       3       reserved
                  4       4       AT&T proprietary point-to-point
                  5       5       AT&T proprietary point-to-multipoint
                                  (1 SPID mode)
                  6       6       AT&T proprietary point-to-multipoint
                                  (2 SPIDs mode)
                                  All other values are reserved.
  S87=    bit     dec     hex
          4      *0       0       overlap sending of the a/b adapter
                  16      10      en bloc sending of the a/b adapter
                                  (This is the default for Japanese
                                   ISDN. A user must push the '#'
                                   button after dialing in order to
                                   send the dialed phone numbers.)
          5-6    *0       0       Bundle connection is disabled           &Jn
                  32      20      Bundle connection is enabled in answer
                                  mode only
                  64      40      Bundle connection is enabled in call
                                  mode only
                  96      60      Bundle connection is enabled in both
                                  directions
                       
  S89=    bit     dec     hex     Bundle and data encryption control
          0       0       0       DES disabled
                  1       1       DES preferred
          1       0       0       Single DES is alright
                  2       2       Triple DES is preferred
          2       0       0       PKDS on, key automatically generated
                  4       4       no PKDS, keyin the key words
          3       0       0       If DES link cannot be established then
                                  keep connection.
                  8       8       If DES link cannot be established then
                                  disconnect the call
          6       0       0       disable the metering pulse
                  64      40      enable the metering pulse
  S100            dec     hex     B channel bundling protocol selection
                  0       0     * Multiple Link Protocol (MLP)
                  1       1       cFossil channel bundling (CCB)
                                  (not supported for American version)

  S102    bit     dec     hex     Outgoing ISDN data type                 Bnn
                                  Value has the same definition as S82
  S104+n          dec     hex     Outgoing Service Indicator (for 1TR6 only)
                                  n = 0(internal fax/modem), 2(ISDN data),
                                      or 3(a/b adapter)
                  1       1       Fernsprechen
                  2       2       a/b - Dienste
                  7       7       Datenbertragung 64 kbps. The defaults
                                  are :
                                  2 - internal fax/modem
                                  7 - ISDN data
                                  1 - a/b adaptor)
  S108+n          dec     hex     Outgoing Service Additional (for 1TR6 only)
                                  Information
                                  n = 0(internal fax/modem), 2(ISDN data),
                                      or 3(a/b adapter)
          SI=1    1       1       ISDN-Fernsprechen 3.1 kHz
                  2       2       Fernsprechen analog
          SI=2    2       2       Fax Gruppe 3
                  3       3     * Daten ber Modem
                  4       4       Btx ber Modem
          SI=7    0       0       Datenbertragung 64 kbps (X.75 SLP)
                  11------        Async V.110
                  01------        Extensions of async
                  --0-----      * Number of data bits : 8
                  --1-----        Number of data bits : 7
                  ---0----      * Number of stop bits : 1
                  ---1----        Number of stop bits : 2
                  ----0---      * No parity
                  ----1---        Even parity
                  11---000        1200 bps
                  11---011        2400 bps
                  11---100        4800 bps
                  11---101        9600 bps
                  11---110        14400 bps
                  11---111      * 19200 bps
                  01---000        38400 bps
                  1010----        Sync V.110
                  10100000        1200 bps
                  10100011        2400 bps
                  10100100        4800 bps
                  10100101        9600 bps
                  10100110        14400 bps
                  10100111        19200 bps
                  10101000        48000 bps
                  10101001        56000 bps
                  10101010        56000 bps for 56kbit-network
                  10101111        In band negotiation
  S108+n          dec     hex     High Layer Compatibility (Non-1TR6)
                                  n = 0(internal fax/modem), 2(ISDN data),
                                      or 3(a/b adapter)
                 *0       0       No High-Layer-Compatibility
                                  information element will be sent
                  1       1       Telephone
                  4       4       Facsimile Group 2/3
                  40      28      Teletex service(Rec.F.220)
                  49      31      Teletex service(Rec.F.200)
                  50      32      Information interworking for
                                  video services(Rec.F.300 T.110)
                  53      35      Telex service(Rec.F.60)
                  56      38      Message Handling Syxtems(MHS)
                                  (Rec.X.400 series)
                  65      41      OSI application(Rec.X.200 series)
  S114                            I-field data length (MSB byte)
  S115                            I-field data length (LSB byte)
  S117                            V.110 user rate                    B1n
  S118    bit     dec     hex
          2       0       0       Default B channel line speed is 64Kbps
                                  for ISDN data call                      &E0
                  4       4       Default B channel line speed is 56Kbps
                                  for ISDN data call                      &E1
          4      *0       0       Use 3.1KHz Bearer service whenever
                                  possible for internal fax/modem
                  16      10      Use Speech Bearer service whenever
                                  possible for internal fax/modem
          5      *0       0       Use 3.1KHz Bearer service whenever
                                  possible for a/b adapter
                  32      20      Use Speech Bearer service whenever
                                  possible for a/b adapter
          6      *0       0       Enable the a/b adapter to accept global calls
                  64      40      Forbid the a/b adapter to accept incoming
                                  calls with MSN unmatched (including global
                                  calls, see AT&ZI=s)
          7      *0       0       Enable analog incoming calls
                  128     80      Reject analog incoming calls (pure ISDN data)

  In 'Reference' column, 'AT' is omitted when AT command is referred to.
  +nnn is manufacturer 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, used in LCD model for setting 'STATUS REGISTER'
          manually from front panel

  RESULT CODE OPTIONS TABLE

  ATV0    ATV1            ATX0  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         %    %    %    %    @
    22    CONNECT 115200        %    %    %    %    @
    23    CONNECT 230400        %    %    %    %    @
    24    CONNECT 460800        %    %    %    %    @
    25    CONNECT 921600        %    %    %    %    @
    26    CONNECT 307200        %    %    %    %    @
    27    CONNECT 153600        %    %    %    %    @
    28    CONNECT 102400        %    %    %    %    @
    29    CONNECT 61440         %    %    %    %    @
    30    CONNECT 51200         %    %    %    %    @
    31    CONNECT 624000        %    %    %    %    @
    32    CONNECT 124800        %    %    %    %    @
    33    CONNECT 62400         %    %    %    %    @
    34    CONNECT 41600         %    %    %    %    @
    35    CONNECT 31200         %    %    %    %    @    $    #
    36    CONNECT 24960         %    %    %    %    @
    37    CONNECT 20800         %    %    %    %    @
    38    CONNECT 33600         %    %    %    %    @    $    #
    39    CONNECT 28800         %    %    %    %    @    $    #
    40    CONNECT 26400         %    %    %    %    @    $    #
    41    CONNECT 24000         %    %    %    %    @    $    #
    42    CONNECT 21600         %    %    %    %    @    $    #
    43    CONNECT 48000         %    %    %    %    @    $    #
    44    CONNECT 56000         %    %    %    %    @    $    #
    45    CONNECT 64000         %    %    %    %    @    $    #
    46    CONNECT 112000        %    %    %    %    @    $    #
    47    CONNECT 128000        %    %    %    %    @    $    #

  Note:
  V       Supported
  %       Reporting DTE rate:
          <cr><lf>CONNECT DTE_Speed<cr><lf>
  @       For internal fax/modem:
          CONNECT DTE speed/Protocol Link speed/Error control level***
          Example: CONNECT 38400/V.32bis 14400/V.42bis
          For ISDN data call:
          <cr><lf>CONNECT DTE_Speed/Protocol DCE_Speed/Error_Control
                                                  [/Data_Compression]<cr><lf>
  $       <cr><lf>CONNECT DCE_Speed[/Error_Code]<cr><lf>
          Example: CONNECT 14400/ARQ
  #       For internal fax/modem:
          CONNECT Link speed/Error control (ARQ)/Error control level***
          Example: CONNECT 14400/ARQ/MNP5
          For ISDN data call:
          <cr><lf>CONNECT DCE_Speed/Error_Code/Protocol
                                 [/Error_Control[/Data_Compression]]<cr><lf>
  *       Use S42b6 to disable 'RINGING' result code
  ***     Data compression included.   'SREJ' is appended if a V.42
          connection with selective reject is established.
  Error_Code:
          NONE
          ARQ
  Error_Control: (This field will not show if no error control is negotiated)
          LAPB
          LAPD
          V42
  Data_Compression:
          V42b
  DTE_Speed:
          all possible DTE speed supported
  Protocol: (only ISDN protocols are listed here)
          X.75
          X.75M           ;X.75 with MLP Bundle
          X.75C           ;X.75 with cFos Bundle
          V110
          V120
          V120M           ;V.120 with MLP Bundle
          V120C           ;V.120 with cFos Bundle
          SLIP
          PPP
          BTX

  Use ATS35 bit 7 (ATS35.7=1) to enable the following numerical result
  codes when an error control connection is made.

      ATV0 Code    ATV1 String            ATV0 Code    ATV1 String
         50        CONNECT                   61        CONNECT 24000
         51        CONNECT 1200              62        CONNECT 26400
         52        CONNECT 2400              63        CONNECT 28800
         53        CONNECT 4800              64        CONNECT 31200
         54        CONNECT 7200              65        CONNECT 33600
         55        CONNECT 9600              66        CONNECT 38400
         56        CONNECT 12000             67        CONNECT 48000
         57        CONNECT 14400             68        CONNECT 56000
         58        CONNECT 16800             69        CONNECT 64000
         59        CONNECT 19200             70        CONNECT 112000
         60        CONNECT 21600             71        CONNECT 128000



