[SIPForum-discussion] SIP Help

Tue May 29 07:42:36 UTC 2007

For the To header and the Request-URI, I am very concern with how the
UAC, UAS, Proxy process them.

Another situation, in the SIP-I application, one switch may be both UAC
and  UAS in the same sip - sip call. It does not only route the incoming
invite message to the next hop as the proxy does. Is there anybody
familiar with the change of the To header and the request-URI in such a
situation?

Thanks,

ALEX  

ESN: 8782

________________________________

From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Deepanshu
Sent: Tuesday, May 29, 2007 3:16 PM
To: Avishek Chowdhury
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] SIP Help

To and Contact is entirely different

To header is logical address of *receiver*.
Contact header is real address of  *sender*  who send the SIP message.

	----- Original Message ----- 

	From: Avishek Chowdhury
<mailto:avishekchowdhury at tataelxsi.co.in>  

	To: Murgesh Kumbar <mailto:murgesku at nortel.com>  ; Alex Zhang
<mailto:alexzhang at gdnt.com.cn>  ; gujjenaveen at gmail.com ;
ken_ryon at hotmail.com 

	Cc: discussion at sipforum.org 

	Sent: Tuesday, May 29, 2007 2:41 PM

	Subject: Re: [SIPForum-discussion] SIP Help

	Hi,

	If To header field denotes the destination address then please
explain me the difference of To header field and Contact header field.

	Regards,

	Avishek

		----- Original Message ----- 

		From: Murgesh Kumbar <mailto:murgesku at nortel.com>  

		To: Alex Zhang <mailto:alexzhang at gdnt.com.cn>  ;
gujjenaveen at gmail.com ; ken_ryon at hotmail.com 

		Cc: discussion at sipforum.org 

		Sent: Tuesday, May 29, 2007 11:11 AM

		Subject: Re: [SIPForum-discussion] SIP Help

		To header is always the final destination in a point to
point call.

		But, Request URI may or may not change with each hop
depending on the routing used.(loose routing or strict routing.

		If loose routing is used , then Request URI is same as
the value of 'To'

		If strict routing is used, Request URI changes with each
hop.

		Please refer to rfc 3261 for more details.

		Hope this is clear.

		Regards,

		Murgesh

________________________________

		From: discussion-bounces at sipforum.org on behalf of
Zhang, Alex GDNT (External:ASRB:G615)
		Sent: Tue 5/29/2007 10:17 AM
		To: gujjenaveen at gmail.com; ken_ryon at hotmail.com
		Cc: discussion at sipforum.org
		Subject: Re: [SIPForum-discussion] SIP Help

		Can anybody explain the difference between the usages of
the To Header
		and the Request-URI in the start line? They both specify
the destination
		of the invite message, but which is used to the real
routing purpose?
		And how the rest is used?

		Thanks,
		ALEX 
		ESN: 8782
		-----Original Message-----
		From: discussion-bounces at sipforum.org
		[mailto:discussion-bounces at sipforum.org] On Behalf Of
Naveen Gujje
		Sent: Tuesday, May 29, 2007 12:20 PM
		To: Ken Ryon
		Cc: discussion at sipforum.org
		Subject: Re: [SIPForum-discussion] SIP Help

		RFC 3665 would be sufficient.

		On 5/28/07, Ken Ryon <ken_ryon at hotmail.com> wrote:
		>
		>  http://www.networksorcery.com/enp/protocol/sip.htm
		>
		>  Cheers,
		>  -Ken
		>
		>
		> ________________________________
		> Date: Mon, 28 May 2007 14:50:49 +0200
		> From: gurudattbalaji at gmail.com
		> To: discussion at sipforum.org
		> Subject: [SIPForum-discussion] SIP Help
		>
		>
		> Hi all,
		>
		> Does any one has quick referrence quide for SIP? which
talks about all
		> messages and headers of SIP.
		>
		> Pls share.
		>
		> Reg
		> Balaji
		>
		> ________________________________
		> Change is good. See what's different about Windows
Live Hotmail. Check
		it
		> out!
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