Hi!
Get a debug isdn q931 and see if the provider is sending the caller-id via the Facility IE, if that's the case check this
bug: CSCdz72442 H225 CONNECT message does not pass Display IE
Symptom:
The name of the called party may not show up on an IP phone.
Condition:
This may happen when the called party on the PSTN answers a call, the router
receives a CONNECT message with the Display IE in Codeset 6. The router does
not send the Display IE in the H225 CONNECT message.
Workaround:
Could use MGCP or a different switchtype such as QSIG if possible.
You can check this TAC Case Collection too:
http://www.ciscotaccc.com/kaidara-advisor/voice/showcase?case=K14016668
Regards,
Teresa.
If you find this post helpful, please rate! :)
Regards,
Tere.
If you find this post helpful, please rate! :)