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Craigyb found out PIN connection for TEL interface, here they are:

Pin 1 - terminal 30
Pin 2 - terminal 31
Pin 8 - NF +
Pin 9 - NF -
Pin 11 - Mic -
Pin 12 - Mic +
Pin 15 - K line ( dont bother, not supported on later units )
Pin 16 - Mute
Pin 17 - CAN H
Pin 18 - Can L
 

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Bluetooth TEL interface PIN diagram - Update

Their was a bug with VAGCOM that did not allow you to access Control Module #77.

In my case (Audi S3 2002 with the 8P0 862 335 M BT Module) It is very necessary to connect this pin.

Pin 15 - K line
 

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Craigyb found out PIN connection for TEL interface, here they are:

Pin 1 - terminal 30
Pin 2 - terminal 31
Pin 8 - NF +
Pin 9 - NF -
Pin 11 - Mic +
Pin 12 - Mic -
Pin 15 - K line ( dont bother on A3, not supported on later units )
Pin 16 - Mute
Pin 17 - CAN H
Pin 18 - Can L
 
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