ISDN Disconnect “Cause i = 0x829F”

Caller is able to recieve calls but unable to make calls, when making a call they get a  flat dial tone.

Traces show the following:

Dec 20 10:51:51.676: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8  callref = 0x
Cause i = 0x829F – Normal, unspecified

The Cause code 82 is related to the receiving equipment (telco switch) requesting to use a channel that is not activated on the interface for calls.

This looks like an issue with BT who have deactivated the line (in this case, due to not paying bills)

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