
Unshielded
Shielded
7
Not Used
7
8
Not Used
8
The table below summarizes the RJ45 port pinout.
Table 36: RJ45 Port Pinout
Description
Direction
Signal Name
Pin
1PPS RS422 signal
Output or Input
1PPS_P
1
1PPS RS422 signal
Output or Input
1PPS_N
2
Do NOT connect
Output
RESERVED
3
GND
4
Time of Day character
GND
5
Do NOT connect
Input
RESERVED
6
Time of Day character
Output or Input
TOD_P
7
Time of Day character
Output or Input
TOD_N
8
Serial Cable Pinouts
The following sections summarize the pinouts for 14-port serial interface module when used with the cable
types specified in Connecting Serial Cables.
DB-9 Connector Pinouts
The table below summarizes the pinouts for each serial interface type when using a DB-9 connector.
Table 37: DB-9 Pin-outs
IRIG-B
RS-485
Description
Direction
Standard
DB-9
Pin
NC
NC
Unused
Output
NC
1
NC
NC
Receive
Input
RxD
2
IRIG-B (RS232)
NC
Transmit
Output
TxD
3
IRIG-B-
(RS485)
TxD-
DTR
Output
DTR
4
GND
GND
GND
—
GND
5
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
172
Troubleshooting
Serial Cable Pinouts