Telephone mode, function

Navigation processor with

GPS receiver and

gyrosensor

CC player

Central

computer

Audio signal

processing

CD drive

Diagnosis

Radio tuner

Radio and navigation module

(A2/56)

Sound amplifier

(A2/13)

Data link connector (X11/4)

AF signals

Vehicle loudspeaker

Microphone

(B25/6)

CTEL and GPS antenna splitter (A2/57)

Roof antenna

Telephone and GPS

(A2/49)

(A35)

(A35/8)

CTEL interface

(A34/4)

D2B

GPS

Microphone

(B25)

CD player with changer

(in trunk)

(A2/6)

D2B

D2B

D2B



Telephone

AMPS network

Portable cellular telephone

(A34/6)

Block diagram for MCS telephone system

illustrated with the following equipment specification:

 Sound system (code 810)

 CD changer (code 819)

 with telephone

A35/8 E-call control module

B25 Hands-free system microphone

B25/6 Sound amplifier microphone

The components marked are significant for the telephone mode .

GPS Global positioning system

D2B Digital data bus

AF Audio frequency (20 Hz....20kHz)

A2/6 CD player with changer (in trunk)

A35 CTEL transmitter/receiver

The telephone system can be operated as follows:

 directly on the radio and navigation module (A2/56) or

 with the portable cellular telephone (A34/6) or

 with the telephone handset (A34)

Making a call, function

The data telegrams (e.g. button actuation) for controlling the telephone system are relayed to the telephone transmitter/receiver (A35) from the radio and navigation module (A2/56) via the digital data bus (D2B)

The actual telephone connection is completed by the CTEL/GPS antenna splitter (A2/57) and the CTEL and GPS roof antenna (A2/49)

The audio source is automatically muted during a telephone call.

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After switching over to the telephone mode the following display appears:

 Strength of received signal (illustrated with 5 beams)

 Message indicating readiness for telephone mode with "Ready" display.

 Multifunction keys "NUM" and "NAME".

 Entering code
The telephone can be protected against undesired use by entering a three-digit code.All telephone functions are disabled except the emergency call function.

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The telephone can be enabled again by entering the three-digit code (correction possible with "Clear" button in the event of incorrect entry) and actuation of the multifunction key "OK".

The following functions are available in the telephone mode:

 Emergency call function
This function offers the possibility of transmitting an emergency call within the reception range of the radio telephone network.The emergency callnumber is stored in the memory location 1 and can be called even when the telephone is disabled.The emergency call is performed by pressing and holding control button 1 down longer than 1 second "EMERGENCY" appears on the display. An emergency call can be terminated by pressing the "END" button.

 Manual entry of telephone number
Telephone numbers can be entered manually on the number pad.

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An incorrectly entered number can be deleted by momentarily pressing the "CLEAR" button. If the "CLEAR" button is pressed for longer than 2 s all telephone numbers deleted

 If the number entered consists of only 1 or 2 numbers, the telephone number stored in the memory with this code is dialed.

The entered telephone number can be transmitted to the telephone by pressing the "SEND" button.The telephone compares the transmitted telephone number with the telephone number stored in the memory.If the numbers coincide the associated name, the memory location number and the telephone appear on the display (depending on setting).

If the numbers do not coincide, the telephone number entered is still displayed.
Then the connection can be completed.The duration of the telephone call is indicated in minutes and seconds.The call can be terminated by pressing the "END" button.

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 Selecting stored telephone number
The memory can be called up by pressing the multifunction key "NAME" or "NUM"."NAME" indicates the stored names on the display"NUM" indicates the

memory location number as well as the associated telephone number.By pressing the "joystick" up or down the stored entries are displayed. Pressing to the right or left causes display of the next 4 entries or previous 4 entries.

 If a name is not available for the stored telephone number, the display is switched over and the memory location and the telephone number are displayed.

By manually entering 1 or 2 numbers and subsequent actuation of the multifunction key "NAME" or "NUM" the name stored under this memory location number or the stored telephone number are indicated.

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Pressing "SEND" button completes the desired connection.
If no connection is to be completed, the memory area can be exited by pressing the multifunction key "EXIT".

 Quick dial
When a one or two-digit number is entered and the "SEND" button is actuated the telephone number stored under this memory location number is dialed.

 By pressing and holding one of the number buttons 1 to 9 for more than 2 s the telephone number stored under this memory location number is dialed. In this case it is not necessary to actuate the "SEND" button.

 Memory location number 1 is reserved for emergency functions!

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 Redialing
Pressing the "SEND" button without previously entering a telephone number calls up the last5 selected telephone numbers on the display.It is possible to select the desired telephone number by pressing the "joystick" up or down.The connection is completed by actuating the "SEND" button.This area can be exited by pressing the multifunction key "EXIT".

 Incoming calls
During an incoming call all other audio sources are set to mute and "CALL" appears on the display.The call can be accepted by pressing the "SEND" button or terminated by pressing the "END" button. During a call it is possible to continue dialing, e.g. enter a code number for an answering machine.