Sun Microsystems Netra 440, Service Manual

Page: 149 / 166

Appendix B Connector Pinouts 131
Alarm Port
The alarm port uses a standard DB-15 connector. In a telecommunications
environment, use this port to connect to the central office alarming system.
FIGURE B-7
shows the pin numbering of the alarm port,
TABLE B-7
and describes the
pin signals.
FIGURE B-7
Alarm Port
TABLE B-7
Alarm Port Signals
Pin Signal Description Pin Signal Description
1 RESERVED 9 ALARM1_NC
2 RESERVED 10 ALARM1_COM
3 NC 11 ALARM2_NO
4 NC 12 ALARM2_NC
5 ALARM0_NC
1
1 The ALOM software sets the ALARM0 (critical) relay and the associated (critical) LED for the following
conditions:
• When the system is in Standby mode.
• When the server is powered on and the operating system has not booted or has failed.
13 ALARM2_COM
6 ALARM0_NO
1
14 ALARM3_NO
7 ALARM0_COM
1
15 ALARM3_COM
8 ALARM1_NO CHASSIS FRAME GND
1 8
9 15