Selecting telephone antenna, function - GF82.95-P-3001P

MODELS 203, 210, 220 up to 31.8.03 with CODE (855) TELE AID with CODE (930) Taxi emergency call 

MODELS 208.3, 215 up to 31.8.03 with CODE (855) TELE AID 

A GSM (global system for mobile communication) is required for transmitting a TELE AID emergency call telegram (TELE AID emergency call or telediagnosis), for completing a voice connection or for simply making a phone call.

For normal telephone calls this is (model 215) the telephone antenna (A2/22), (model 203, 208, 210, 220) or telephone antenna (A2/49a1). In case of an accident (e.g. rollover) the telephone antenna (A2/22), (A2/49a1) can be destroyed. The antenna could also have another defect. TELE AID emergency call/telediagnosis is no longer possible then. In order to be sure that this is prevented, the TELE AID backup antenna (A2/50) is installed as well as the telephone antenna (A2/22), (A2/49a1). These antennas are located at a crash-safe location and should only be used if required. For this purpose the D2B telephone and TELE AID transmitter/receiver (A35/17) has two GSM antenna inputs via which the corresponding active antenna is switched through.

Fig 1: Identifying Tele Aid Emergency Call System Control Module Diagram - Models 203 With Codes (855) And (930)

The telephone antenna (A2/22) (model 215), (A2/49a1) (models 203, 208, 210, 220) is continuously active until an emergency call is triggered. If an emergency call is triggered the D2B telephone and TELE AID transmitter/receiver (A35/17) checks the signal level of the telephone antenna (A2/22) (model 215), (A2/49a1) (models 203, 208, 210, 220). If this is too low the level of the TELE AID backup antenna (A2/50) is checked The antenna with the higher signal level is used for connection (see structogram).