Table 19: RJ-45 1PPS/ToD Port Pinouts
Description
Direction
Signal Name
Pin
Do Not Connect
Output
RESERVED
1
Do Not Connect
Input
RESERVED
2
1PPS RS422 signal
Output or Input
1PPS_N
3
—
—
GND
4
—
—
GND
5
1PPS RS422 signal
Output or Input
1PPS_P
6
Time-of-Day character
Output or Input
TOD_N
7
Time-of-Day character
Output or Input
TOD_P
8
Alarm Port Pinouts
The table below summarizes the external alarm input pinouts.
Table 20: External Alarm Input Pinouts
Description
Signal Name
Pin
Alarm input 0
ALARM0_IN
1
Alarm input 1
ALARM1_IN
2
No connect
—
3
Alarm input 2
ALARM2_IN
4
Alarm input 3
ALARM3_IN
5
No connect
—
6
No connect
—
7
Alarm common
COMMON
8
Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation
Guide
129
Troubleshooting
Alarm Port Pinouts