Sun Microsystems Netra 240, Service Manual

Page: 139 / 154

Appendix B Connector Pinouts 121
Alarm Port
The alarm port on the alarm rear transition card uses a standard DB-15 connector. In
a telecommunications environment, use this port to connect to the central office
alarming system.
FIGURE B-5
shows the pin numbering of the alarm port, and
TABLE B-9
describes the pin signals.
FIGURE B-5
Alarm Port Pin Numbering
TABLE B-9
Alarm Connector Signals
Pin Service Pin Service
1 9 ALARM1_NC
2 INPUT0 - 10 ALARM1_COM
3 NC 11 ALARM2_NO
4 NC 12 ALARM2_NC
5 ALARM0_NC 13 ALARM2_COM
6 ALARM0_NO 14 ALARM3_NO
7 ALARM0_COM 15 ALARM3_COM
8 ALARM1_NO CHASSIS FRAME GND
8
1
15
9
ALARM