Any ideas what causes this error? Tracked it down to the ISDN , but dont know what it means?
ISDN setup is correct in that we can place and recieve calls ( we get about 20,000 inbound calls per day on the node that reporting this error, but no more than 20 calls at once. )
Were not doing anything clever, just playing a .gsm file to the caller when they dial in.
Any help much appreciated.
regards
David