Design

Phone Module (PHM)

Design

Antenna





The carphone has an antenna. This antenna contains a GPS antenna and a carphone antenna. The carphone antenna is directly connected to the phone module (PHM). The antenna is on the roof.

There are diagnostics for the carphone antenna.

Phone modules (PHM) with Volvo On Call function also have an integrated reserve antenna. This is in the control module. The reserve antenna is only used when a Volvo On Call service is activated and if the standard antenna is not functioning. The reserve antenna ensures that the vehicle data can be transmitted and that a voice call can be connected the Volvo On Call Customer Service Center. The reserve antenna cannot be used for the customer's private subscription if the standard antenna is not working.

Handset





The handset is directly connected to the phone module (PHM). The handset is in the center console.

The phone module (PHM) determines whether to connect the call using hands free or the handset, depending on the signal from the cradle. When the handset is in the cradle, all voice calls are hands free. The handset is activated when it is removed from the cradle. The cradle signal to the phone module (PHM) is controlled by a magnetic switch in the handset. The switch is closed by a magnet in the cradle. When the handset is in the cradle, the cradle signal to the phone module (PHM) is 0 V. When the handset is in use the signal is 5 V.

There are diagnostics for the handset.

SIM card holder





The holder for the customer's private SIM card is inside the glove compartment at the top left-hand side. The SIM card holder is connected in series to the phone module (PHM).

There are diagnostics for the SIM card holder.

Switches for Volvo On Call





The switches for ON CALL and SOS are on the dashboard under the switch for the hazard warning flashers. The switches are only for phone modules (PHM) with Volvo On Call functionality.

The switches are directly connected to the phone module (PHM).

The switches are powered and grounded via the phone module (PHM). The luminance is regulated by a pulse width modulated signal.

There are diagnostics for the switches.