Serial Port Pin Assignments; Db-9 Port Pin Assignments - SMC Networks Barricade SMC7004ABR User Manual

C
ABLES

Serial Port Pin Assignments

The DB-9 serial port on the rear panel is used to connect the
Barricade to an ISDN TA or PSTN modem. The pin assignments
used to connect to this port are provided in the following tables.
Figure B-2. DB-9 Serial Port Pin Numbers

DB-9 Port Pin Assignments

EIA CCITT
Circuit Signal
CF 109 DCD (Data Carrier Detected) 1
BB 104 RxD (Received Data)
BA 103 TxD (Transmitted Data)
CD 108.2 DTR (Data Terminal Ready)
AB 102 SG (Signal Ground)
CC 107 DSR (Data Set Ready)
CA 105 RTS (Request-to-Send)
CB 106 CTS (Clear-to-Send)
CE 125 RI (Ring Indicator)
B-4
Description Gateway's PC DB9
DB9 DTE DTE
Pin # Pin #
1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
Modem Signal
DB25 Direction
DCE Pin # DTE-DCE
8 <------
3 <------
2 ------>
20 ------>
7 -------
6 <------
4 ------>
5 <------
22 <------