Hi

Please help

I have a Cisco 3845 version c3845-spservicesk9-mz.124-10.bin connected to a suppliers Cisco Voice gateway controlled by a CALL MANAGER

Problem:

Making a call over the SIP gateway to the ISDN Cisco Voice gateway(3845) integtrated(cross over ISDN cable ) with a ISDN Cisco Gateway on a Call MANGER.

Problem is there is no ringback to the Calling side but I am get a ALERTING message "RINGBACK." on the ISDN level

048888: *Feb  9 20:14:54.765 SAST: ISDN Se0/0/0:15 Q931: RX <- CALL_PROC pd = 8  callref = 0x8EE0
        Channel ID i = 0xA98381
                Exclusive, Channel 1
048889: *Feb  9 20:14:54.881 SAST: ISDN Se0/0/0:15 Q931: RX <- ALERTING pd = 8  callref = 0x8EE0

and now I am send this back to my SIP PEER aswell

048895: *Feb  9 20:15:57.265 SAST: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 183 Session Progress
Via: SIP/2.0/UDP 192.168.0.14:5060;branch=z9hG4bK831p6d10185glk4b36k0.1

... THE call does complete .. Only NO Ringback.

Any assittance welcome.

I did come accross a CISCO artical not to use Voice class codec  but I must use g729br8  else Vad are enable and calls If I don't use class codec this is what I get

048919: *Feb  9 20:20:32.221 SAST: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 488 Not Acceptable Media

Thank you