09-23-2018 02:33 AM - edited 03-17-2019 01:31 PM
we have ring back tone issue with below scenario
PSTN -----PRI (E1)----SIP VGW--- SIP trunk-----CUCM----SIP TRUNK-----CUC(AA)---Transferred Calls to Internal IP Phone.
When incoming call trough above scenario and Transferred by Unity AA to internal extension , Caller not get ring back tone .
Our action
1-Enable PRACK on SIP trunk between GW and CUCM also on SIP TRUNK between CUCM and CUC
2-Enable PRACK on Voice Gateway which enabled by default
Result :
Same issue
Kindly check SIP VGW logs below debugs
debug voip ccapi inout
debug ccsip message
09-23-2018 03:56 AM
09-23-2018 04:44 AM - edited 09-30-2018 06:18 PM
Hello Nipun
Thanks for your support.
I already configured Sip trunk with media resources contain Annunciator .
10-02-2018 02:30 AM
Nipun,
I dont think this ia working as designed. Normally the first leg of the call ie call to AA will not get a ring back but the transfer to the phone should generate ring back to the caller.
My first question is does ring back work on normal calls from the PSTN?
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