Cellular Phone Microphone: Description and Operation

GF82.70-P-4121SXX Hands-Free System Microphone, Component Description
- with CODE (389) Mobile phone preinstallation with universal interface, USA/Canada
- with CODE (386) Preinstallation for telephone "Handy", UPCI system
- with CODE (388) Telephone "Handy", UPCI system
- with CODE (396) Linguatronic - English (US)
- with CODE (813) Voice control system (VCS [SBS])
- with CODE (494) USA version
- with CODE (498) Japan version

Component Identification:

Location
The hands-free system microphone group is integrated in the inside rearview mirror unit (A67).

Task
The hands-free system microphone group converts sound waves into electrical signals and serves for:
^ Voice input for making telephone calls using the hands-free system
^ Voice input for making phone calls with Telematic Alarm Identification on Demand (emergency call system) (TELE AID) emergency call
^ Voice input in vehicles with voice control system (VCS)

Design
The hands-free system microphone group comprises 2 microphones.

Function except code (396) Linguatronic - English (US), except code (813) Voice control system (VCS [SBS]), except code (494a) USA version or except code (498) Japan version
The hands-free system microphone group is connected with the UPCI control unit (Universal Portable CTEL Interface) (N123/1) on vehicles without VCS

Function with code (396) Linguatronic - English (US), with code (813) Voice control system (VCS [SBS]) or with code (494a) USA version
On vehicles with VCS the hands-free system microphone group is connected with the voice control system control unit (VCS) (N41/3) The voice control system (VCS [SBS]) control unit forwards the processed voice signals to the corresponding control units via Media Oriented System Transport (MOST)

Function with code (498) Japan version
The hands-free system microphone group is directly connected to the COMAND controller unit (A40/3), because the telephone and VCS [SBS] functions are integrated in the COMAND controller unit.