Scenario#41 – No Ringback tone from H323 Gateway going to SIP trunk

Posted: September 29, 2012 in Uncategorized

Good stuff Here for sure.

VOICE ON BITS

One of our customer reported an issue with ring back tone when calling their Contact center.

I made a test call and observed that as a caller when you call their main Contact center number all you hear is dead silence and then when agent picks up the phone you could hear them talk. There was no ring back tone and no automated messages before an agent picks up the call.

The call flow was something like this:

PSTN > ISDN30 > H323 Dial-peer > SIP Trunk > 3rd-party Contact Center Equipment

First I thought it could be the third-party equipment which was not sending back the ring back tone so I asked them to confirm this. They came back saying they are definitely sending ring back and there was no issue with their equipment.

Looking at Q931 debugs I could see ALERTING message with payload but wasn’t sure why…

View original post 708 more words

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