[pjsip] Custom Parameters

Oliver Carr oliver.carr at gmail.com
Tue Sep 18 13:24:38 EDT 2007

  Have you thought of using a Retry-After parameter as listed at:

  Normally a custom parameter is prefxied by a "p" I think, eg pKeepAlive:

  Further reading the SIP standard at:
http://www.ietf.org/rfc/rfc3261.txt has found:
     Retry-After: 18000;duration=3600
      Retry-After: 120 (I'm in a meeting)

Can you provide any further info?


On 18/09/2007, Hitesh Tewari <htewari at hotmail.com> wrote:
> Hi,
> Is there a mechanism in SIP to allow for user defined fields to be sent along with a SIP message.
> Specifically I would like to periodically send some user defined fields with the re-INVITE (keep alive)
> method from my SIP phone. I am assuming that the VoIP provider is able to deal with the parameters
> in some proprietary way. I would be grateful for any pointers. Thanks.
> Hitesh
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