provided by Star2Billing S.L.

Calls to DIDs are currently not handled very well if the DID destination leg fails.

This bug exhibits different symptoms depending if simultaneous / individual access is set on the user that the DID is billed to.

If individual access:
1) Call the DID whilst the DID destination is busy
2) Call is answered with "This card is in use"

If simultaneous access:
1) Call the DID whilst the DID destination is busy
2) Call is answered with "The number is busy"

I think in both instances it would be better not to answer the call at all, and fail it with congestion.