SIP trunk to CallManager Express - No Ring Back

Answered Question
Aug 13th, 2009

Hi there,

I've connected the CallManager Express through a SIP trunk to a SIP provider. I have the following situation:

Sip Telephone Number -> SIP Provider -> SIP TRUNK -> CallManager Express -> IP Phone

When I call the SIP telephone number (either from PSTN or chell phone), then there is no Ring Back.

I hope someone can help me to sort out this issue.


I have this problem too.
0 votes
Correct Answer by Paolo Bevilacqua about 7 years 2 months ago


progress_ind setup enable 3

under the incoming voip DP.

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Overall Rating: 5 (1 ratings)
Stoyan Stoitsev Thu, 08/13/2009 - 23:29


progress_ind is for h.323 only (at least that's what they say in the command ref) ;)

Dennis Mink Fri, 08/14/2009 - 05:13


once you have produced the debug innformation, after the INVITE from your SIP provider as a result of the incoming call attempt, your gw shoudl send a 180 "RINGING" message back to your SIP provider, see if that is actually happening



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