[VoiceOps] Call established before audio path

[Lee Riemer]

Some SBCs will wait for RTP to be sent from an endpoint so it can identify the source IP and port to use for the return RTP.

> -----Original Message-----
> From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Eric
> Wieling
> Sent: Friday, June 13, 2014 11:31 AM
> To: Brian Taylor; voiceops at voiceops.org
> Subject: Re: [VoiceOps] Call established before audio path
> 
> In my experience allow reinvites / directmedia, etc will cause a short delay in
> setting up audio.
> 
> -----Original Message-----
> From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Brian
> Taylor
> Sent: Friday, June 13, 2014 12:07 PM
> To: voiceops at voiceops.org
> Subject: [VoiceOps] Call established before audio path
> 
> We have customers who are reporting that when people call into them that the
> beginning of the greeting is not being heard.
> It appears that the phones think the call is ready before there is a complete
> audio path. We see this the most on calls that come in from the PSTN. Long
> distance or toll free calls are the worst.
> We have a Broadworks system that uses Lucent 5010 (Telica) switches for the
> connections to the PSTN.
> The symptom seems to be very similar for all of our PSTN connections, to
> multiple carriers.
> 
> I'm just curious if anyone has any experience with this problem, or if anyone
> has any suggestions to get to the bottom of the issue.
> 
> Any assistance or inspiration would be greatly appreciated.
> 
> Thank you,
> Brian Taylor
> Socket Telecom, LLC
> brian at socket.net
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