53
Installing and Connecting the Router
Connectors and Cabling for the 8-Port Asynchronous/ Synchronous RS-232 GRWIC
RS-232 DB-9 Cable Pinouts
shows the pinouts for the CAB-9AS-M (High Density 4-port EIA-232 to DB-9, DTE) cable.
Table 12
Pinouts for Male and Female DB-25 Cables
Pin
Signal
Direction
Description
1
SHIELD
GND
—
Shield Ground
2
TXD
Input
Transmit Data. Arriving data from DCE.
3
RXD
Output
Transmit Data. Sending data from DTE.
4
RTS
Input
Request to Send
5
CTS
Output
Clear to Send
6
DSR
Output
Data Set Ready
7
GND
—
Ground
8
DCD
Output
Carrier Detect
9
—
—
Reserved for data set testing.
10
—
—
Reserved for data set testing.
11
—
—
Unassigned
12
—
—
Unassigned
13
—
—
Unassigned
14
—
—
Unassigned
15
TXC
Output
Transmit Clock
16
—
—
Unassigned
17
RXC
Output
Receive Clock
18
LTST
Input
Loopback Test (also Local Loopback)
19
—
—
Unassigned
20
DTR
Input
Data Terminal Ready
21
—
—
Unassigned
22
—
—
Unassigned
23
—
—
Unassigned
24
TXCE
Input
Transmit Clock Enable
25
—
—
Unassigned
Table 13
Pinouts for CAB-9AS-M (Male DB-9)
Pin
Signal
Direction
Description
1
—
—
2
RD
Input
Receive Data. Arriving data from DCE.
3
TD
Output
Transmit Data. Sending data from DTE.
4
—
—
5
SGND
—
Ground
6
—
—