Cellular Phone System (prior to 2009 model year) (Discovery 3)

Contents: Location of cellular phone system…⇩ Transceiver module ⇩ Contacts of the C2777 transceiver…⇩ Microphone ⇩ Cell phone antenna ⇩ Phone Adapter Holder ⇩ Phone adapter support plate ⇩

Location of cellular phone system components

Item name	Spare part catalog number	Description
1	-	Microphone
2	-	Transceiver (TM)
3	-	Cell phone antenna
4	-	Base plate adapter
5	-	Adapter holder
6	-	Speaker
7	-	Movable contact group
8	-	Steering wheel switches
9	-	Amplifier
10	-	IHU
11	-	Speakers

The cellular phone system includes:

Transceiver (TM)
Base plate adapter
Phone holder
Microphone
Cell phone antenna

The telephone system used in this vehicle allows the driver to mount his mobile phone on the vehicle and use it hands-free. This is done using a holder that is unique to each brand of phone. The phone holder, in turn, is installed in a standard adapter that is connected to the transceiver. The transceiver is connected to the local MOST network, through which it exchanges data with other components of the system. For more information, refer to the Communications Network (418-00 Module Communications Network)

Transceiver module

The Transceiver Module (TM) is located in the right rear of the luggage compartment. The TM serves as an interface between the telephone and the integrated head unit (IHU). The TM also contains the hardware and software for the voice recognition system.

Contacts of the C2777 transceiver connector

Contact No.	Description	Input signal/output signal
1-15	Normally closed	-
16	Ignition	Input signal
17	Battery voltage	Input signal
18	Battery voltage	Input signal
19-32	Normally closed	-
33	Weight	-
34	Weight	-
35	Normally closed	-
36	Normally closed	-
37	(+) cell phone speaker	Output signal
38	(-) cell phone speaker	-
39	(+) cell phone microphone	Input signal
40	(-) cell phone microphone	-
41	Ringtone (not for Nokia phones)	Input signal
42	Ringtone (for Nokia phones)	Input signal
43	Normally closed	-
44	Talk button on the steering wheel	Input signal
45	Reception / transmission of telephone signal	Input signal/output signal
46	"Mass" of shielding	-
47	(+) serial data transfer (tire F Nokia)	Output signal
48	(-) serial data transfer (tire F Nokia)	-
49	(+) serial data reception (tire F Nokia)	Input signal
50	(-) serial data reception (tire F Nokia)	-
51	Phone Holder Identification Signal	Input signal
52	Phone holder supply voltage	Input signal
53	"Mass" of phone charger	-
54	Battery charging voltage	Output signal

Microphone

(The full version is available on the website: lrman.ru)

The same microphone is used when talking on the phone "Hands Free" (free hands) and in the voice command recognition system. The microphone has a built-in noise suppressor for hands-free operation of the phone. The microphone has a standard directional characteristic and is mounted on the roof console.

Cell phone antenna

The cell phone antenna is housed in a roof-mounted fairing and is connected to the TM module via a single coaxial cable. For more information, please refer to Antenna (415-02 Antenna)

Phone Adapter Holder

The mobile phone system allows the use of phones of different models and manufacturers. This is achieved by using a holder that is suitable for a specific phone. Holders have design differences depending on the model of the mobile phone.