NO Ringback tone on SIP-TRUNK

[Alonzo Gutierrez Vadillo]

Hi everyone recently i created a SIP-TRUNK connection to an VOIP service provider, the calls works just fine but the ring-back tone since you dial the number until someone answers were unable to hear it!!! Does any one know why??? 

Thanks for your comments,

[Suresh Subramanian]

is it CUCM or CME?

If it is CUCM, is it SIP trunk between to GW or H323?

can you collect "debug ccsip message" for a call and provide the calling/called numbers and also the GW configuration?
 

[Alonzo Gutierrez Vadillo]

Thanks yeah its a CUCM 9.x the gateway has a conection to cucm h323 and the trunk is SIP to the telephony service provider.

here is teh config and debug info

calling number 1574 called number 4423979277

Hope this helps Thanks !!!

[Suresh Subramanian]

You received 183 session progress with SDP and it indicates that the ringback tone is sent by your provider. Also there is always an interoperability issue when you have H323 between CUCM&GW and SIP to Provider. Why don't you have SIP trunk between CUCM and GW instead of H323?

[Alonzo Gutierrez Vadillo]

oh ok great so teh problem is H323, why i have it that way, i dont know i didnt configure it maybe because at first the sip trunk wanst on the plan, i really dont have a lot of knowledge in VOIP, how can i change the h323 to sip??

do you a guide or something ?

that will solve the problem??

THANKS FOR ALL YOUR HELP

[Suresh Subramanian · Accepted solution]

Here is the guide. http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/117300-configure-cube-00.html