Serial port pin assignments, Db-9 port pin assignments – Accton Technology CheetahAccess Wireless Gateway AC-IG2004W User Manual
Page 63
Serial Port Pin Assignments
B-3
Serial Port Pin Assignments
The DB-9 serial port on the rear panel is used to connect the CheetahAccess
Wireless Gateway 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
<------