I have researched the archives without much luck. The tech support at Ericsson is worthless. Perhaps, someone has the pin outs for this cellphone. And some information about the Ericsson handsfree kit HF7600. I have looked at the kit and at the so called manual that comes with it. My questions are 1) Does the HF7600 support a separate exterior mount antenna? 2) Does the HF7600 have a output for the music mute? My understanding from the FAQs on the Nokia hands free setup and from looking at the Nokia handsfree manual is that the Audi stock radio only needs to receive a grounding signal in order to display "PHONE" and to mute the radio/cassette/CD. 3) On the back of the HF7600 control box there are an RJ45 connector and a proprietary connector. What are these for and what are the pin outs? I suspect that atleast one of them is for the music mute kit that is sold separately.
If anyone has this info or a source for this info please e-mail me at ericashby@aol.com. Once I get this information I should be able to install the HF7600, and then I'll post the instructions. Otherwise, I'll have to switch to the Nokia.

It seems that more people are accessing the post on the A4 forum. (I know it is off topic, but ...anyway) Check the A4 forum for more info on integrating the Ericsson LX788.