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

[Brian Meade]

Definitely at least need the "debug ccsip messages" for one of the calls.
 We'll need to see if AT&T is sending a 180 Ringing or if they're sending a
183 Session Progress w/ SDP to play the ringback inband.  If they're
sending a 183 Session Progress, make sure the SIP Profile on the SIP Trunk
has the Rel1XX Options set to Send Prack if 18X contains SDP.


On Tue, Jun 3, 2014 at 12:43 PM, Matthew Loraditch <
MLoraditch at heliontechnologies.com> wrote:

>  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
>
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