We have an Asterisk PC contaning a Digium TE220 ISDN30 card connected to an Avaya IP Office 500 V2 phone system.
ISDN30 E1 > ASTERISK PC TE220P span 1 > ASTERISK PC TE220P span 2 > AVAYA IPO
Software versions being used are:
Libpri Version: 1.4.12
DAHDI Version: 2.4.1.2
Asterisk Version 1.4.26.2
When we try to dial out from an internal phone, asterisk receives 11 digit phone number and then starts to dial out. However we then see – WARNING[11368] channel.c: Unexpected control subclass ‘5’ and the call fails.
We have raised this with digium and they believe the actual error comes from q931.c in libpri and is passed up to chan_dahdi.c in Asterisk to display the message. It appears that the ptr (pointer ?) of the call is not found and therefore prevents the outbound call.
They have assured me that they are working on the problem however it has been a couple of months and dont appear to be getting very far.
Please let me know if you want to see the dial plan and full PRI debug log. The dial plan is very straight forward and looking at the report from digium is unrelated.
We are part of a FTSE 100 company full details available on request.
April 7, 2023
Phone System 