Installation manual

HW Interfaces Discrete I/O
50 Apr 2004
Appendix B.5 Discrete I/O
The transceiver also has a discrete I/O interface containing
four input/outputs, of the open collector type. Inputs may
be used for outputs for external alarms, debit pulses, B-
Answer, payphone interface etc. The connector outline and
pin assignments are described in the table below.
1
Pin Number Connection
1 Discrete I/O 1
2 Discrete I/O 2
3 Discrete I/O 3
4 Discrete I/O 4
5 Common Return
6 +28 VDC/50 mA Out
7 GND