[SIPForum-discussion] P-Early Media header confusion
Banda, Srinivas (Srinivas)
sribanda at avaya.com
Thu Jun 13 08:02:09 UTC 2013
Hi Ankur,
Please find the extract from RFC-5009 for the P-Early-Media Header:
If the proxy also performs gating of early media, then it uses the
parameter(s) of the P-Early-Media header field to decide whether to
open or close the gates for backward and forward early media flow(s)
between the UAs. The proxy performing gating of early media may also
add a "gated" parameter to the P-Early-Media header field before
forwarding the message so that other gating proxies in the path can
choose to leave open their gates.
If the UAC is a trusted server within the network (e.g., a PSTN
gateway), then the UAC may use the parameter(s) of the P-Early-Media
header field in messages received from the UAS to decide whether to
perform early media gating or cut-through and to decide whether or
not to render backward early media in preference to generating
ringback based on the receipt of a 180 Ringing response.
Regards
Srinivas
From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of ankur bansal
Sent: Tuesday, June 11, 2013 2:43 PM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] P-Early Media header confusion
HI All ,
I am getting 180 response with Sdp and headers like Content Disposition: session and P-Early-media :gated .
Can some one explain what P-Early-media = gated meant here and how client should act on it?
Thanks & regards
Ankur Bansal
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