[cisco-voip] No Ringing on Some outbound Calls - at&t ipFlex

[Chris Ward (chrward)]

In order for CUCM to tell a phone to play ringback tone, CUCM must receive a ringing or progress indicator from the network. CUCM is probably not getting the indicator in this case. Some SIP debugs on the GW for a working and not working call would probably show that. I suspect a flex issue.

+Chris
TME - MediaSense and Unity Connection

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Matthew Loraditch
Sent: Tuesday, June 03, 2014 12:43 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] No Ringing on Some outbound Calls - at&t ipFlex

We are having a regular but not always issue with a client, where they are not hearing the ringing when dialing outbound on calls. These are SCCP 6945s to UCM 9.1.2 SIP Trunked to CUBE and then handoff to at&t's ipFlex service.
If anyone has some suggestions to look at before I spend time with TAC it would be appreciated!
Thanks!


Matthew G. Loraditch - CCNP-Voice, CCNA-R&S, CCDA
1965 Greenspring Drive
Timonium, MD 21093

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