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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
1
Not connected
2
TRANSMIT DATA (TxD)
3
RECEIVE DATA (RxD)
4
REQUEST TO SEND (RTS)
5
CLEAR TO SEND (CTS)
6
DATA SET READY (DSR)
7
SIGNAL GROUND (GND)
8
CARRIER DETECT (CD)
9 – 19
Not connected
20
DATA TERMINAL READY (DTR)
21
Not connected
22
RING INDICATOR (RI)
23-25
Not connected
DB25 Pin Description
DIRECTION
OUTPUT
INPUT
OUTPUT
INPUT
INPUT
GROUND
INPUT
OUTPUT
INPUT
®
Fastcom
: G232/8-PCI-335
10
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