[SIPForum-discussion] Huawei Switch Media issue,

Olle E. Johansson oej at edvina.net
Mon Sep 19 18:28:04 UTC 2011

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 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.


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