Telephone switch-on/off characteristics (D-network), function - GF82.70-P-2005A

MODEL 129, 163, 168, 202.08 /09 /18, 203, 208, 210, 215, 220 with CODE (854) MB portable cellular telephone 

Portable cellular telephone 

Switch-on/off characteristics of D2B telephone (portable cellular telephone) 

The behavior of the D2B telephone in the D2B ring is only subject to the state of circuit 15 (ignition ON/OFF). Information on the state of c. 15 is transmitted to the CTEL interface (A34/4)  by the head unit (COMAND/radio) via the D2B ring. The CTEL interface (A34/4)  does not have an electrical connector to c. 15 and switches the portable cellular telephone on and off by request of the head unit via the D2B ring or an external wake-up line

When the ignition is switched off the CTEL interface (A34/4)  and thereby the telephone remains switched on for a shut-off delay of t = 10 min. and is then switched off. It is possible to program a different shut-off delay time (t = 1 - 60 min.)

System characteristics 

The CTEL interface (A34/4)  has 3 different operating states.

• Power down mode

  The interface is switched off except for the external wake-up line.

• Idle mode or shut-off delay mode

  The remaining components of the D2B ring are switched off; only the interface remains active for t=10 min (preset) after the D2B ring (ignition OFF) is switched off.

• Active mode

  The interface as well as the remaining components of the D2B ring are active and available to the user.

Switch-on procedure 

1. Current state: ignition ON, CTEL interface (A34/4)  is in inactive state (power down mode), telephone system is not ready for operation.

   The CTEL interface (A34/4)  is activated (active mode) when:

   • a portable cellular telephone is plugged into the portable cellular telephone mount in the switched-on state
   • a portable cellular telephone plugged into the mount is switched on
   • when the portable cellular telephone is plugged in and switched on during a call (incoming and outgoing)
   • a wake-up signal of another D2B ring subscriber is recognized via the external wake-up line
2. Current state: Ignition OFF, CTEL interface (A34/4)  is in the shutoff delay phase (idle mode) and D2B ring is in the inactive state (switched off).

   The CTEL interface (A34/4)  is activated (switched to active mode) when:

   • the portable cellular telephone is plugged in and switched on during a call (incoming and outgoing)
   • a wake-up signal from another D2B ring subscriber is recognized via the external wake-up line

Switch-off procedure 

The CTEL interface (A34/4)  is in the shut-off delay phase (idle mode) and the D2B ring is switched off.

The interface remains switched off as long as the portable cellular telephone is not plugged in or a plugged in portable cellular telephone is switched off.

The following cases are possible depending on the state of circuit 15:

• Circuit 15 ON

  After expiration of the shut-off delay of t = 10 min. (preset) the interface switches off (power down mode). Thereby the state of the portable cellular telephone plugged in does not change, i.e. a plugged in or active portable cellular telephone still remains switched on and is not switched off by the interface.

• Circuit 15 OFF

  After expiration of the shut-off delay of t = 10 min. (preset) the interface switches off (power down mode). Thereby the state of the portable cellular telephone plugged in changes, i.e. a plugged in or active cellular telephone is switched off by the interface.

When the D2B ring is deactivated the CTEL interface (A34/4)  switches off when a portable cellular telephone is not plugged in or a plugged in portable cellular telephone is not switched on. The interface remains active for the time of the shut-off delay if a switched on portable cellular telephone is plugged in.

Telephone interface, location/purpose/design/function

GF82.70-P-3107P