[SIPForum-discussion] Huawei Switch Media issue,

[Krm-e]

This is happening at the call setup and then the phone send a PRACK and the call is canceled, is this has anything to do with the  silent supp=0 being sent in the SDP header? 


________________________________
From: Olle E. Johansson <oej at edvina.net>
To: Kareem eid <krmeid at yahoo.com>
Cc: "discussion at sipforum.org" <discussion at sipforum.org>
Sent: Monday, September 19, 2011 10:28 PM
Subject: Re: [SIPForum-discussion] Huawei Switch Media issue,


18 sep 2011 kl. 09:03 skrev Kareem eid:

> 
> Is there any way to find out why the Huawei switch  is sending c=IN IP4 0.0.0.0 in 180 ringing?
> 

This used to be a way to indicate call hold, meaning they want to send you a ring tone, but don't receive any media. The reason why we do not recommend this is that this also blocks RTCP. The a=sendonly attribute would propably be a more "modern" way of indicating the same.

/O
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sipforum.org/pipermail/discussion/attachments/20110920/f1d9e8a8/attachment-0002.html>