10
Fastcom
®
: G232/8-PCI-335
DB25 Pin Description
The FASTCOM: G232/8-PCI-335 features eight RS-232 channels, which are accessed through eight DB25
connectors on the cable assembly.
The following is a pin description of the DB25 connectors:
PIN NO.
SIGNAL NAME
DIRECTION
1
Not connected
2
TRANSMIT DATA (TxD)
OUTPUT
3
RECEIVE DATA (RxD)
INPUT
4
REQUEST TO SEND (RTS)
OUTPUT
5
CLEAR TO SEND (CTS)
INPUT
6
DATA SET READY (DSR)
INPUT
7
SIGNAL GROUND (GND)
GROUND
8
CARRIER DETECT (CD)
INPUT
9
– 19
Not connected
20
DATA TERMINAL READY (DTR)
OUTPUT
21
Not connected
22
RING INDICATOR (RI)
INPUT
23-25
Not connected