
LINKSYS

PCMCIA LAN MODEM CARD

Card Type                    Fax, Modem (synchronous/asynchronous),
                             Network Interface Card
Chip Set                     AT&T
I/O Options                  Ethernet 10BaseT connector,
NIC Type                     Ethernet
Network Transfer Rate        10Mbps
Maximum Modem Rate           28.8Kbps
Maximum Fax Rate             14.4Kbps
Data Bus                     PCMCIA Type II
Fax Class                    Class I
Data Modulation Protocol     Bell 103A/212A

                             ITU-T V.21, V.22, V.23, V.34
Fax Modulation Protocol      V.17
Error Correction/Compression MNP4-5, V.42, V.42bis
Topology                     Star
Wiring Type                  Unshielded twisted pair
Boot ROM                     Not available

                                                                      V2109

                         Proprietary AT Command Set

                          COMMUNICATION PROTOCOLS

  Type:                  Configuration

  Format:                AT [cmds] Bn [cmds]

  Description:           Selects the communication protocol for data
                         calls

  Note:                  The B command allows the simultaneous selection
                         of more than one suffix, enabling multiple
                         protocols.

        Command                              Protocol

          B0             ITU-T V.22 at 1200bps or V.21 at 300

          B1             Bell 212A at 1200bps or Bell 103 at 300

          B2             V.23 selection, in originate mode and receive at
                         1200bps, transmit at 75bps; in answer mode,
                         receive at 75bps and transmit at 1200bps

          B3             V.23 selection, in originate mode receive at
                         75bps and transmit at 1200bps; in answer mode
                         receive at 1200bps and transmit at 75bps

                            COMMUNICATIONS MODE

  Type:                Configuration

  Format:              AT [cmds] &Mn [cmds]

  Description:         Selects communications mode

       Command                                Mode

         &M0           Asynchronous mode

         &M1           Synchronous connect mode and asynchronous off-line
                       command mode.

         &M2           Synchronous connect mode and asynchronous off-line
                       command mode and set DTR high.

         &M3           Synchronous connect mode, manual dial with
                       talk/data switching

         &M4           Hayes Auto -Synchronous mode

                          CONFIGURATION PROFILES

  Type:               Immediate

  Format:             AT [cmds] &Vn [cmds]

  Description:        Displays active, stored configuration profiles, and
                      stored telephone numbers

      Command                              Function

        &V0           Displays for profile 0

        &V1           Displays for profile 1

                              DCE LINE SPEED

  Type:                Register

  Format               AT [cmds] S37=n [cmds]

  Description:         Sets the maximum allowable data exchange rate
                       attempted during handshake process.

       Command                              Function

        S37=0          Speed of last connection

        S37=3          300bps

        S37=5          1200bps

        S37=6          2400bps

        S37=7          4800bps

        S37=8          7200bps

        S37=9          9600bps

       S37=10          12.0Kbps

       S37=11          14.4Kbps

       S37=12          16.8Kbps

       S37=13          19.2Kbps

       S37=14          21.6Kbps

       S37=15          24.0Kbps

       S37=16          26.4Kbps

       S37=17          28.8Kbps

                                 DTE Rate

  Type:          Register

  Format         AT [cmds] S62=n [cmds]

  Description:   Sets the DTE rate

    Command                              Function

     S62=0       300bps

     S62=1       600bps

     S62=2       1200bps

     S62=3       2400bps

     S62=4       4800bps

     S62=5       7200bps

     S62=6       9600bps

     S62=7       12.0Kbps

     S62=8       14.4Kbps

     S62=9       16.8Kbps

     S62=10      19.2Kbps

     S62=11      21.6Kbps

     S62=12      24.0Kbps

     S62=13      26.4Kbps

     S62=14      28.8Kbps

     S62=15      38.4Kbps

     S62=16      57.6Kbps

     S62=17      115.2Kbps

                          Dte data transfer speed

  Type:          Register

  Format         AT [cmds] S72=n [cmds]

  Description:   Sets the DTE rate during data transfer

    Command                              Function

     S72=0       Last speed in autobaud

     S72=1       300bps

     S72=2       600bps

     S72=3       1200bps

     S72=4       2400bps

     S72=5       4800bps

     S72=6       7200bps

     S72=7       9600bps

     S72=8       12.0Kbps

     S72=9       14.4Kbps

     S72=10      16.8Kbps

     S72=11      19.2Kbps

     S72=12      21.6Kbps

     S72=13      24.0Kbps

     S72=14      26.4Kbps

     S72=15      28.8Kbps

     S72=16      38.4Kbps

     S72=17      57.6Kbps

     S72=18      115.2Kbps

                               FLOW CONTROL

  Type:          Configuration

  Format:        AT [cmds] &Kn [cmds]

  Description:   Enables flow control options

    Command                              Function

      &K0        Flow control disabled

      &K1        Reserved

      &K2        Reserved

      &K3        RTS/CTS flow control enabled

      &K4        XON/XOFF flow control enabled

      &K5        Error

                             INACTIVITY TIMER

  Type:                  Configuration

  Format:                AT [cmds] \Tn [cmds]

  Default:               0

  Range:                 0-90

  Unit:                  1 minute

  Description:           Sets the length of time that the modem does not
                         receive information before it disconnects.

                             INACTIVITY TIMER

  Type:                  Register

  Format                 AT [cmds] S30=n [cmds]

  Default:               0

  Range:                 0-90

  Unit:                  1 minutes

  Description:           Maximum duration of DTE and DCE inactivity
                         allowed prior to initiating hang-up process.

  Note:                  S30=0 disables the timer and allows indefinite
                         inactivity.

                             INACTIVITY TIMER

  Type:                  Configuration

  Format                 AT [cmds] \Tn [cmds]

  Default:               Unidentified

  Range:                 0-90

  Unit:                  1 minute

  Description:           Sets the time the modem waits before modem chip
                         set disconnects if there is no data activity

                            NO CARRIER TIME-OUT

  Type:                  Register

  Format                 AT [cmds] S7=n [cmds]

  Default:               60

  Range:                 1-255

  Unit:                  1 second

  Description:           Maximum wait time the modem uses after dialing
                         to detect a carrier signal from the remote modem
                         for both originating and answering calls.

  Note:                  W dial modifier also uses S7 to set the maximum
                         time to wait.

                            V.32 - AUTO-RETRAIN

  Type:                  Configuration

  Format:                AT [cmds] &Bn [cmds]

  Description:           Controls auto-retrain function if poor line
                         quality is detected

        Command                              Function

          &B0            Auto-retrain disabled modem hangs-up

          &B1            Auto-retrain enabled if line quality is poor,
                         hangs up if condition lasts more than the value
                         of register S7

          &B2            No retrain, no hang-up

