On Fri, Mar 4, 2016 at 3:56 PM, Karl Schmidt <karl@xtronics.com> wrote:

When people call in (via callcentric) - they hear a stutter in the ringtone.

My understanding is that the ringtone is generated by freeswitch - looks like here:

<action application="set" data="transfer_ringback=${us-ring}"/>

We are running the Debian release - 1.4.26~37-1~jessie+1

Could be this is a new 'feature'? Never sure.

Anyone else seeing this?

I'm thinking the ringtone might be using a different CODEX?

You can be absolutely certain of what's happening by taking a pcap of the SIP and RTP that are leaving the box when the call comes in from Callcentric. Verify that you're sending a 183 w/SDP and that there's actual early media leaving your system. If there is, analyze the RTP and see if the stutter can be heard there. If it's PCMU then Wireshark is great for this kind of thing. (Lots of info in Confluence on packet captures and analysis if you need a reference.)

The pcap analysis should at the very least help you narrow down where the stutter is coming in to play and where to go next.

-MC

--
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Karl Schmidt EMail Karl@xtronics.com
Transtronics, Inc. WEB https://secure.transtronics.com
3209 West 9th Street Ph (785) 841-3089
Lawrence, KS 66049 FAX (785) 841-3089

Teaching people to think of themselves as victims is close to pure evil.
kps
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