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Converting 183 Session progress to 180 ringing

Hello,

I have a Cisco CUBE interfaced with a 3rd party PBX via SIP and PRI for PSTN access. If the user on the PBX has a call forward turned on, the PSTN user doesnt hear a ringback. After some analysis it looks like the PBX is not sending a 180 Ringing, it only sends 183 with no SDP. Is it possible to map 183 to an alerting message? Or are there other options to fix the ringback issue?       

Thanks in advance!       

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4 REPLIES

Converting 183 Session progress to 180 ringing

Hi George,

I don't think that there is any possibilty to convert 183 to 180 (i.e from one message to another ) but you can modify some parameters for that particular message.

Now regarding your scenario, if it's possible to receive 183 session progress with sdp then your problem can be resolved.

And if it's not possilbe to receive 183 with sdp then please send debug ccsip all and debug isdn q931 & also your cube configuraiton.

Regards,

Nishant Savalia

Regards, Nishant Savalia

Converting 183 Session progress to 180 ringing

Hi George.

Can you please upload you cube config and both debug isdn q931 and debug ccsip messages?

Thanks.

Regards..

Carlo

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Re: Converting 183 Session progress to 180 ringing

Hello,

Please find attached the config and debugs

Thanks in advance!

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Converting 183 Session progress to 180 ringing

Anyone?

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