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Frequent Contributor

Ringback on SIP trunk

Hi,

We have a CUCM with a CUBE and a SIP trunk with provider.

 

When a INVITE is send to the provider, and we receive an 180, we hear ring back

When a INVITE is send to the provider, and we receive an183 w/o SDP we hear ring back

When a INVITE is send to the provider, and we receive an183 w SDP we don't hear ring back

 

I know that in case of an 183 with SDP, the ring back should come directly from provider. But is there something on a CUBE that could be wrong configured that could also cause this?

Or, except maybe not to go in discussion with provider, is there a way to generate the ring back locally even if CUBE receives 183 w SDP ?

 

JH

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