I see in VAG:
01303 Telephone Receiver (R36)
004 No Signal/Communication.
History is that I had everything working OK with BT but ran my damn battery down in the process (lost track of time.) Right after that I started to see these Signal/Communication errors. Battery is fine now, but can't get the errors to go away.
Any ideas?

the wire running to pin 1 (carries power) on the 54 pin connector needed to be re-inserted and re-crimped.