GF82.70-P-3107-02Q Telephone Interface, Function

GF82.70-P-3107-02Q Telephone Interface, Function
- with CODE (854) MB portable cellular telephone


The telephone interface (A34/4) is switched on and off via a discrete wake-up line. It reacts to the voltage drop (level is max. 5 V in quiescent condition) and the duration of the wake-up signal.

The telephone interface (A34/4) is wired directly to the portable CTEL bracket for power supply and signal transmission. Incoming control data from the Digital Data Bus (D2B) are relayed via the telephone interface (A34/4) to the portable CTEL bracket and therefore the portable CTEL (A34/6) using discrete data lines.

The telephone interface (A34/4) therefore conveys the functions to be carried out (e.g. select phone number, "ON" or "OFF", etc.) to the portable CTEL (A34/6) upon request from the operating unit. In the reverse direction, the data (caller's voice, control data) is transmitted from the telephone interface (A34/4) in an appropriate D2B format and relayed for further processing to the operating unit. The telephone interface (A34/4) converts electrical pulses into optical pulses.