Appendix A Signal Pinouts A-5
A.3.2 Serial Port TTYA
The port labeled TTYA accepts a DB-9 connector. Use this port for general purpose
serial data transfers.
FIGURE A-4 shows the pin numbering of the serial port. TABLE A-8
describes the pin signals.
FIGURE A-4 Serial Port (TTYA) Pin Numbering
A.4 Alarm Port
The alarm port on the alarm rear transition module uses a standard DB-15 connector.
In a telecommunications environment, use this port to connect to the central office
alarming system.
FIGURE A-5 shows the pin numbering of the alarm port. TABLE A-9
describes the pin signals.
Note – The alarm port relay contacts are rated for 100 V 0.2 A maximum.
FIGURE A-5 Alarm Port Pin Numbering
1
8
915
ALARM
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