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IP Softphone Dual ring tones

I have a CM 3.2(2a) and Softphone 1.3 - this is connected to a Meridian via a 2610 voice gw with a E1 PRA - calling from normal IP phone to the outside world or a Meridian extension is ok, however when placing calls from a softphone to either of these destinations causes two sets of ringing tones while the call is proceeding.

Calling from softphone to 79X0 phone is ok. Any ideas? The gateway PRA config is as follows:

interface Serial1/0:15

no ip address

ip mroute-cache

no logging event link-status

isdn switch-type primary-net5

isdn protocol-emulate network

isdn incoming-voice voice

isdn send-alerting

isdn negotiate-bchan

isdn bchan-number-order ascending

no cdp enable


dial-peer voice 5 pots

preference 1

destination-pattern [2-9]...

progress_ind alert enable 8

progress_ind progress enable 8


port 1/0:15


The calls are matched on the dial-peer 5 detailed above. I have tried turning off the alert and progress PIs. The problem is intermittent, but happens for 9 out of 10 calls....

any ideas?

Cisco Employee

Re: IP Softphone Dual ring tones

Sounds like you are getting out of band ringback from ccm and then the audio is being cut through which is giving you inband ringback from the pstn. You will probably need to look at a debug voip ccapi inout and see if when you are seeing the problem you may not be hitting the correct dial-peer or you may also need a debug isdn q931 to see if something is different.

Thank you,


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