Serial port pin assignments, Db-9 port pin assignments – SMC Networks Barricade SMC7004AWBR User Manual
Page 84
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C
ABLES
B-4
Serial Port Pin Assignments
The DB-9 serial port on the rear panel is used to connect the
Wireless 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
Circuit
CCITT
Signal
Description
Gateway’s
DB9 DTE
Pin #
PC DB9
DTE
Pin #
Modem
DB25
DCE Pin #
Signal
Direction
DTE-DCE
CF
109
DCD (Data Carrier Detected)
1
1
8
<------
BB
104
RxD (Received Data)
2
2
3
<------
BA
103
TxD (Transmitted Data)
3
3
2
------>
CD
108.2
DTR (Data Terminal Ready)
4
4
20
------>
AB
102
SG (Signal Ground)
5
5
7
-------
CC
107
DSR (Data Set Ready)
6
6
6
<------
CA
105
RTS (Request-to-Send)
7
7
4
------>
CB
106
CTS (Clear-to-Send)
8
8
5
<------
CE
125
RI (Ring Indicator)
9
9
22
<------
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