V50 T5 AWD L5-2.5L Turbo VIN 67 B5254T7 (2008)
The phone module (PHM) with Volvo On Call function has a reserve microphone and speaker. The loudspeaker is inside the control module. The
microphone is by the switches for Volvo On Call. The reserve microphone and speaker are only used when a Volvo On Call service is activated and the
standard speaker and microphone for handsfree are not available.
Phone modules (PHM) with Volvo On Call function 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.
Signals
The following table summarizes the input signals to and output signals from the phone module (PHM). The signal types are divided into directly
connected signals, MOST and CAN communication. The illustration below displays the same information with the Volvo component designations.
