Comtech EF Data CRS-311 - Manual (Page 171)

CRS-311 1:1 Redundancy Switch Revision 7
Appendix B MN/CRS311.IOM
B–3
B.1.4 CRS-230 “System Alarms” Connector (DB-25F)
Table B‐3 indicates the pinout for the CRS‐230 DB‐25F “System
Alarms” connector.
Table B-3. “System Alarms” User Data Connector
Pin # Description
1 Traffic Modem Online Status – Common for Pin 6 (Note 2)
14 Not used
2 Not used
15 Not used
3 Not used
16 Not used
4 Not used
17 Not used
5 Not used
18 Not used
6 Traffic Modem Online Status – Normally Open (Note 2)
19 No Connection
7 Ground
20 Audio Indicator (Gnd = Auto On / Float = Audio Off)
8
Form C Fault Relay – Common (common for pins 9-12 and 21-
24)
21 Switch Unit Fault – Normally Closed
9 Switch Unit Fault – Normally Open
22 Modem Summary Unit Fault – Normally Closed
10 Modem Summary Unit Fault – Normally Open
23 Modem Summary Tx Traffic Fault – Normally Closed
11 Modem Summary Tx Traffic Fault – Normally Open
24 Modem Summary Rx Traffic Fault – Normally Closed
12 Modem Summary Rx Traffic Fault – Normally Open
25 Not Used
13 Not Used
Notes:
1. “Normally” refers to the NON‐FAILED state.
2. Traffic Modem Online Status (Open = Online, Closed =
Backup)