P-Asserted Identity

I have a GSM gateway and am trying to redirect the call to a SIP client registered as This email address is being protected from spambots. You need JavaScript enabled to view it.. Here is the INVITE that is generated.

INVITE sip:[email protected] SIP/2.0
Max-Forwards: 70
Supported: replaces,timer
Allow: INVITE,ACK,CANCEL,OPTIONS,BYE,REFER,SUBSCRIBE,NOTIFY,INFO,PUBLISH
CSeq: 102 INVITE
x-best-codec: alaw
Date: Fri,23 Jan 1970 05:43:41 GMT
Content-Length: 241
Contact: <sip:[email protected]:5060>
User-Agent: VoxStack Wireless Gateway
From: "358442992809" <sip:[email protected]>;tag=as7724d966
To: <sip:[email protected]>
Call-ID: This email address is being protected from spambots. You need JavaScript enabled to view it.:5060
Content-Type: application/sdp
Via: SIP/2.0/UDP 131.160.85.79:5060;branch=z9hG4bK39073986;rport

The IMS rejects this INVITE with the message "SIP/2.0 403 Forbidden - Request Not Asserted"

I suspect the problem is that the header 'P-Asserted Identity' is missing from the INVITE. Is there a way to add this header?

Hi,

This is Rick,so sorry to make trouble with you.

Please contact me,let me check you issues.My contact info be shown as below:

Gtalk: This email address is being protected from spambots. You need JavaScript enabled to view it.
Skype: rick.zhu3
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Best Regards.