XDA connector car mute

[blade82]

I'am modifying an old siemens carkit for the Qtek 7070 smartphone which has the same pinout as the XDA. All the function on the carkit ans phone works, except the muting of the carkit speaker when a call is finished.
Also I can't mute the car radio. Does anyone know which pin I should use on the connector?

[futaris]

I too would like to know how others have done the muting on the XDA, XDA2 and Smartphone... I'm planning on putting in a homemade Car Kit in for my Smartphone too.

[LumpiStefan]

Original Car kit for XDA I has a little blackbox, that mutes the radio every time there is some Audio output of the device.
There is no special pin for muting....

HTH

Stefan