Specifications

RS-232C Interface Options
6-97
6.9.1 Attaching the RS-232C Interface
6.9.1.1 Unpacking
Included in the RS-232C Interface kit’s carton box:
RS-232C Interface board....................................................1
Ferrite core .........................................................................1
Screw..................................................................................2
Operating instructions (includes setting-up instructions)....1
Software disk......................................................................1
Software operating instructions ..........................................1
Be sure to save the module and packing materials for reshipment.
To connect between the fax machine and the computer, you need an extra RS-232C interface cable (see
the below).
6.9.1.2 RS-232C interface cable
The RS-232C interface port on the newly installed RS-232C interface has a DB-25 (standard 25-pin serial)
female receptacle which accepts a male DB-25 cable plug . The computer’s port may have either a DB-25
or
DB-9 (9-pin) receptacle. Please consult the interface’s pin assignment on the below.
Note:
Please see the computer’s operating instructions about the serial interface port of the computer.
Pin assignment
Pin No. Signal code Signal name Contents
2 TXD Transmitted data Data signal sent from computer to the fax.
3 RXD Received data The data sent to computer by the fax.
4 RTS Request to send Signal for request to send data.
5 CTS Clear to send Data Enable signal for data transmission from
the fax to the computer.
6 DSR DCE ready Turning on always.
7 SG Signal ground Ground for signal.
20 DTR DTE ready Data Terminal Enable — ready to communicate
Signal direction
25-pin type 9-pin type
The fax The computer The fax The computer
2 TXD 2 TXD 2 TXD 2 RXD
3 RXD 3 RXD 3 RXD 3 TXD
4 RTS 4 RTS 4 RTS 4 DTR
5 CTS 5 CTS 5 CTS 5 SG
6 DSR 6 DSR 6 DSR 6 DSR
7 SG 7 SG 7 SG 7 RTS
20 DTR 20 DTR 20 DTR 8 CTS