GF82.70-P-3107-02D

Telephone interface, function

The fixed installation CTEL D2B interface (A59) is switched on or off via a discrete "Wake-Up" line. It reacts to the falling impulse edge (at rest state level is "high") and the duration of the "Wake-Up" signal. Incoming control data from D2B is directed to the CTEL transmitter/receiver (A35) via the fixed installation CTEL D2B interface (A59) with the aid of discrete data lines; then as requested by the radio (A2) the fixed installation CTEL D2B interface (A59) switches the CTEL transmitter/receiver (A35) on or off and relays the functions to be carried out (e.g. dial number). Inversely, the data (voice of caller, control data)

of the CTEL transmitter/receiver (A35) is converted into an appropriate D2B format by the portable CTEL D2B interface (A59) and then directed to the radio (A2) for further processing.