
MULTI-TECH SYSTEMS, INC.

MT64DSU

Card Type                CSU/DSU
Chip Set                 Unidentified
Maximum Data Rate        64Kbps
Data Bus                 External
Data Modulation Protocol B8RZ

[Image]

                                CONNECTIONS

           Function             Label        Function           Label

  DC power                           CN1      Line out           CN4

  RS-232/422                         CN2      Power switch       SW3

  V.35                               CN3

                        USER CONFIGURABLE SETTINGS

                      Setting
                                                      Label
                                                                 Position

  CSU/DSU will operate in synchronous mode
                                                      SW1/5
                                                                   On

  CSU/DSU will operate in asynchronous mode
                                                      SW1/5
                                                                   Off

  RTS signal forced high
                                                      SW1/6
                                                                   On

  RTS signal normal
                                                      SW1/6
                                                                   Off

  DSR signal forced high
                                                      SW1/7
                                                                   On

  DSR signal normal
                                                      SW1/7
                                                                   Off

  Local loopback test disabled
                                                      SW1/8
                                                                   On

  Local loopback test enabled
                                                      SW1/8
                                                                   Off

  Digital loopback test disabled
                                                      SW1/9
                                                                   On

  Digital loopback test enabled
                                                      SW1/9
                                                                   Off

  Remote loopback test disabled
                                                      SW1/10
                                                                   On

  Remote loopback test enabled
                                                      SW1/10
                                                                   Off

  Test pattern disabled
                                                      SW1/11
                                                                   On

  Test pattern enabled
                                                      SW1/11
                                                                   Off

  Elastic store disabled
                                                      SW1/12
                                                                   On

  Elastic store enabled
                                                      SW1/12
                                                                   Off

  4-wire line is connected
                                                      SW2/1
                                                                   On

  2-wire line is connected
                                                      SW2/1
                                                                   Off

  Leased line is connected
                                                      SW2/2
                                                                   On

  Switched line is connected
                                                      SW2/2
                                                                   Off

  DTR signal forced high
                                                      SW2/3
                                                                   On

  DTR signal normal
                                                      SW2/3
                                                                   Off

  Factory configured - do not alter
                                                      SW2/4
                                                                   N/A

                                LINE SPEED

  Synchronous Mode    Asynchronous Mode        SW1/1           SW1/2

       9600bps             9600bps              On               On

      19.2Kbps             19.2Kbps             Off              On

       56Kbps              38.4Kbps             On              Off

       64Kbps              57.6Kbps             Off             Off

           CLOCK SOURCE

  Setting
               SW1/3
                          SW1/4

   Remote
                On
                            On

  Internal
                Off
                           Off

  External
                Off
                            On

                             DIAGNOSTIC LED(S)

   LED       Color      Status                   Condition

    SD        Red         On            CSU/DSU is transmitting data

    SD        Red         Off         CSU/DSU is not transmitting data

    RD        Red         On             CSU/DSU is receiving data

    RD        Red         Off          CSU/DSU is not receiving data

    CD        Red         On              Carrier signal detected

    CD        Red         Off           Carrier signal not detected

   CTS        Red         On                 CTS signal is high

   CTS        Red         Off                CTS signal is low

   RTS        Red         On                 RTS signal is high

   RTS        Red         Off                RTS signal is low

    OL        Red         On              Network signal detected

    OL        Red         Off           Network signal not detected

    TM        Red         On              CSU/DSU is in test mode

    TM        Red         Off           CSU/DSU is not in test mode

    TM        Red       Blinking       Error detected in test pattern

                         Proprietary AT Command Set

                                AUTO-ANSWER

  Type:              Register

  Format:            AT [cmds] S0=n [cmds]

  Description:       Controls when the CSU/DSU will automatically answer
                     an incoming call.

      Command                              Function

        S0=0          Auto-answer disabled.

        S0=1          CSU/DSU will always answer incoming calls.

        S0=2          CSU/DSU will answer incoming calls when DTR signal
                      is high.

                                DATA LENGTH

  Type:
                  Register

  Format:
                  AT [cmds] S12=n [cmds]

  Description:
                  Selects how many data bits will be transmitted.

     Command
                                          Function

      S12=0
                   8 data bits.

      S12=1
                   7 data bits.

                                DATA PARITY

  Type:           Register

  Format:         AT [cmds] S14=n [cmds]

  Description:    Selects what type of parity bit will be transmitted.

     Command                              Function

      S14=0        No parity.

      S14=1        Even parity.

      S14=2        Odd parity.

                                 DATA STOP

  Type:
                  Configuration

  Format:
                  AT [cmds] S13=n [cmds]

  Description:
                  Selects how many stop bits will be transmitted.

     Command
                                          Function

      S13=0
                   1 stop bit.

      S13=1
                   1.5 stop bits.

      S13=2
                   2 stop bits.

                         DIAL MODE - ASYNCHRONOUS

  Type:                Register

  Format:              AT [cmds] S15=n [cmds]

  Description:         Selects how the CSU/DSU will perform dialing in
                       asynchronous mode.

       Command                              Function

        S15=0           Asynchronous dialing disabled.

        S15=1           Dial number in memory location 0 on DTR going
                        high.

        S15=2           AT dialing enabled.

        S15=3           Dial number in memory location 0 on DTR going
                        high and AT dialing enabled.

                          DIAL MODE - SYNCHRONOUS

  Type:
                         Register

  Format:
                         AT [cmds] S2=n [cmds]

  Description:
                         Selects how the CSU/DSU will perform dialing in
                         synchronous mode.

        Command
                                             Function

         S2=0
                         Synchronous dialing disabled.

         S2=1
                         Dial number in memory location 0 on DTR going
                         high.

         S2=2
                         V.25bis dialing enabled.

         S2=3
                         Dial number in memory location 0 on DTR going
                         high and V.25bis dialing enabled.

                                DSR SIGNAL

  Type:           Register

  Format:         AT [cmds] S9=n [cmds]

  Description:    Controls the behavior of the DSR signal.

     Command                              Function

      S9=0         DSR forced high.

      S9=1         DSR low when off-line or in test mode.

                              ECHO CANCELLER

  Type:
                  Register

  Format:
                  AT [cmds] S7=n [cmds]

  Description:
                  Controls the echo canceller tone.

     Command
                                          Function

      S7=0
                   Echo canceller tone disabled.

      S7=1
                   Echo canceller tone enabled.

                                   HELP

  Type:          Immediate

  Format:        AT [cmds] $ [cmds]

  Description:   Displays the help screens.

                             INACTIVITY TIMER

  Type:
                      Register

  Format:
                      AT [cmds] S3=n [cmds]

  Description:
                      Selects how long the line must be inactive for the
                      CSU/DSU to disconnect.

       Command
                                            Function

        S3=0
                       Disconnect on low DTR only.

        S3=1
                       Set inactivity timer to 10 minutes.

        S3=2
                       Set inactivity timer to 30 minutes.

        S3=3
                       Set inactivity timer to 60 minutes.

        S3=4
                       Set inactivity timer to 10 minutes and disconnect
                       on low DTR.

        S3=5
                       Set inactivity timer to 30 minutes and disconnect
                       on low DTR.

        S3=6
                       Set inactivity timer to 60 minutes and disconnect
                       on low DTR.

        S3=7
                       Do not disconnect on inactivity or low DTR.

                                  REDIAL

  Type:             Register

  Format:           AT [cmds] S1=n [cmds]

  Default:          0

  Range:            0 - 99

  Unit:             1 redial

  Description:      Sets how many times the CSU/DSU will attempt to
                    redial a failed call.

                       REMOTE CONFIGURATION REQUEST

  Type:
                  Register

  Format:
                  AT [cmds] S19=n [cmds]

  Description:
                  Controls requests for remote configuration.

     Command
                                          Function

      S19=0
                   Remote configuration requests denied.

      S19=1
                   Remote configuration requests granted.

                                   RESET

  Type:          Immediate

  Format:        AT [cmds] *Rn [cmds]

  Description:   Resets the CSU/DSU to power-up status.

                                RTS SIGNAL

  Type:
                  Register

  Format:
                  AT [cmds] S8=n [cmds]

  Description:
                  Controls the behavior of the RTS signal.

     Command
                                          Function

      S8=0
                   RTS forced high.

      S8=1
                   RTS follow CTS.

                             SYNCH/ASYNCH MODE

  Type:              Register

  Format:            AT [cmds] S4=n [cmds]

  Description:       Selects whether the CSU/DSU is in synchronous or
                     asynchronous mode.

      Command                              Function

        S4=0         CSU/DSU is in asynchronous mode.

        S4=1         CSU/DSU is in synchronous mode.

                             TRANSMIT PROFILE

  Type:
                     Immediate

  Format:
                     AT [cmds] *Wn [cmds]

  Description:
                     Sends the current S-Register and switch settings to
                     the remote CSU/DSU.

                              V.25bis FORMAT

  Type:           Register

  Format:         AT [cmds] S16=n [cmds]

  Description:    Selects bit- or byte-oriented dialing for V.25bis mode.

     Command                              Function

      S16=0        Bit-oriented dialing.

      S16=1        Byte-oriented dialing.

                      Proprietary V.25bis Command Set

                            DIAL STORED NUMBER

  Type:          Immediate

  Format:        CRSnn

  Description:   Dials the number stored in memory location nn.

