Hey Michael,
Thanks.
I am just throwing this out here for anyone who may stumble on this in archives.
My first thought was you just punted! However, I installed wireshark and had a look. I saw enough to figure out what your statement “You are definitely sending RTP” means! FS is send RTP (Real Time Protocol) packets to the carrier. The RTP packets ARE the audio (profound revelation) . So everything is fine with FS and the audio is getting lost between my Carrier (Vitelity) and SPRINT.
It is odd that we have had no complaints of lost audio except to SPRINT phones. And I must say I do not have this problem on my SPRINT phone except for calls from my FS.
I will post Vitelity’s response.
From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Michael Collins
Sent: Wednesday, May 22, 2013 3:11 AM
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] One Way Audio
You need to show this pcap to your carrier and ask them what's up. You are definitely sending RTP.
-MC