Telephone mode, function

D2B

X11/4

Navigation computer

A35/11

A35/8

A2/13

A1

Diagnosis

Radio tuner

Traffic data recorder

Audio signal processing

B25

CD drive

Central computer

A40/3

A34/6

Vehicle speakers

CAN-B

MFL

N73

CAN-B

A34/4

A28/2

A2/22

Block diagram of telephone system,

illustrated with the following equipment:

 AMPS-network portable CTEL telephone (D2B)

 Voice control system (VCS) (code 813)

D2B Digital data bus

MFL Multifunction steering wheel

A1 Instrument cluster

A2/13 Sound amplifier

A40/3 COMAND operating, display and control unit

B25 Hands-free system microphone

N73 DI control unit

X11/4 Datalink connector

A2/22 Telephone antenna

A28/2 Portable CTEL antenna amplifier

A34/4 CTEL interface

A34/6 Portable CTEL

A35/8 E-call control unit

A35/11 Voice control system control unit

The telephone system can be operated as follows:

 Directly at the COMAND operating, display and control unit (A40/3)

 At the multifunction steering wheel (MFL) in combination with the multifunction display (A1p13) in the instrument cluster (A1)

 With the voice control system (VCS) (code 813)

The telephone radio signals are transmitted and received by the telephone antenna (A2/22) and amplified with the portable CTEL antenna amplifier (A28/2). The display of the COMAND operating, display and control unit (A40/3) shows when the telephone is in its ready status the destination field strengths in 5 grades. All control and useful signals (e.g. audio signals when hands-free system activated) are transferred via the digital data bus (D2B). For this reason, the portable CTEL (A34/6) requires the telephone interface (A34/4) to serve as the interface to the digital data bus (D2B).

The COMAND operating, display and control unit (A40/3) has the following telephone functions:

 Automatic disabling of telephone card when the Personal Identification Number is entered incorrectly 3 times.

 Direct dialing of the telephone number with the rotary control or number pad, display of name of party being called (when number entered is known).

 Speed dialing: The first 10 numbers stored in the memories can be dialed by pressing one key only; all other memories can be dialed by entering the 3-digit memory location number

 Dialing from lists stored in the memory
- Numbers stored in the memory
- Names (alphabetic)
- List of the last 10 numbers dialed