FaxModel/V.42bis  (250-3028)         Pinouts           Faxback Doc. # 3291

Serial connector Pin Assignments*

PIN NO.     LABEL    DESCRIPTION                      DIRECTION

    1       N/A      Protective Ground                N/A

    2       RXD      Received Data                    To Modem

    3       TXD      Transmitted Data                 From Modem

    4       RTS      Request to Send                  To Modem

    5       CTS      Clear to Send                    From Modem

    6       DSR      Data Set Ready                   From Modem

    7       N/A      Signal ground (Common Return)    N/A

    8       RLSD     Received Line Signal Detector    From Modem

   12       CI       Modem Speed Indicator            From Modem

   15       TDCLK    Transmit Data Clock              From Modem

   17       RDCLK    Receive Data Clock               From Modem

   18       AL       Analog Loop                      To Modem

   20       DTR      Data Terminal Ready              To Modem

   21       RDL      Remote Digital Loop Select       To Modem

   22       RI       Ring Indicator                   From Modem

   24       XTCLK    External Transmit Clock          To Modem

   25       TM       Test Mode Indicate               From Modem

In the very unlikely event that you are controlling the modem in
synchronous mode, be sure that the cable has wires for pins 15, 17 and 24
of the 25-pin connector.

(br/all-11/3/94)