[SIPForum-discussion] doubt about "contact field"

[Knupp, Varlei Fernandes]

Thanks a lot for your help.:-)


Varlei Fernandes Knupp

SIEMENS Communications

Customer Services Enterprise

RCC São Paulo - Technical Support

Tel.: +55 11 3817 2659

Fax: +55 11 3817 2613

varlei.knupp at siemens.com <blocked::mailto:varlei.knupp at siemens.com>



________________________________

From: Singh, Indresh (SNL US)
Sent: quinta-feira, 22 de março de 2007 17:16
To: Knupp, Varlei Fernandes; discussion at sipforum.org
Subject: RE: [SIPForum-discussion] doubt about "contact field"


CANCEL message has to be exactly same as INVITE request and also should be sent to the same host port as original INVITE. So in this case gateway correctly rejects the message.

________________________________

From: discussion-bounces at sipforum.org [mailto:discussion-bounces at sipforum.org] On Behalf Of Knupp, Varlei Fernandes
Sent: Thursday, March 22, 2007 11:31 AM
To: discussion at sipforum.org
Subject: [SIPForum-discussion] doubt about "contact field"



Hi to all,

I have a doubt about "contact field".

The proxy send a "INVITE" message =INVITE sip:33133010 at 192.168.2.100:5060 SIP/2.0 to Gateway

The gateway send  a "session progress" message to proxy, but this message has contact field = Contact: <sip:1100 at 192.168.2.100>

The User disconnect the call.

The proxy send a "CANCEL" message to gateway = CANCEL sip:1100 at 192.168.2.100:5060 SIP/2.0 

So the gateway reject the message.

Who is correct?
- The Gateway because reject the call because the proxy changed the header in the message CANCEL
- The Proxy because when the gateway sent contact field = <sip:1100 at 192.168.2.100> the header CANCEL message now is  CANCEL sip:1100 at 192.168.2.100:5060 SIP/2.0.

thanks a lot


Varlei Fernandes Knupp

SIEMENS Communications

Customer Services Enterprise

RCC São Paulo - Technical Support

Tel.: +55 11 3817 2659

Fax: +55 11 3817 2613

varlei.knupp at siemens.com <blocked::mailto:varlei.knupp at siemens.com>


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________________________________________
The information contained in this e-mail is for the exclusive use of the intended recipient(s) and may be confidential, proprietary, and/or legally privileged.  Inadvertent disclosure of this message does not constitute a waiver of any privilege.  If you receive this message in error, please do not directly or indirectly use, print, copy, forward, or disclose any part of this message.  Please also delete this e-mail and all copies and notify the sender. Thank you. For alternate languages please go to http://www.siemens.com.ar/disclaimer/
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