[SIP Beyond VoIP] Notify - 403 Forbidden response

Saúl Ibarra Corretgé saul at ag-projects.com
Wed Jan 2 11:33:55 CET 2013


On Jan 2, 2013, at 10:44 AM, Nitin Jain wrote:

> Hi ,
> Please find attached the wireshark trace at Sylkserver. Sylkserver did not send INVITE to the user mentioned in the Refer-To Header.
> Also from sylkserver notification trace It looks that Sylkserver is trying to transfer the call.


> Only Difference I could see between working logs(sip simple client) and non working logs (Our own Sip Client) are
> 1. Sip simple client subscribe to conference event package where as our client don’t

This is not needed.

> 2. SIP simple Client sends REFER to server out of dialog where as Our client send REFER to server in dialog.

This is the problem. Inviting participants must be done with an out of dialog REFER, as per RFC4579 (sec 5.5). In dialog REFER requests are rejected by SylkServer.


Saúl Ibarra Corretgé
AG Projects

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