[SIPForum-discussion] SIP Help

[Deepanshu]

Sorry i don't understand "if the To header contains a user self-specified
logical name".

what do you mean by self specified? do you mean a display name?
why the translation is needed from logical name (something which is in To)
to the Request URI?

yes in the case of initial INVITE To header is uselss for the proxy, R-URI
is only used for message routing.
But To header is usefull in may senarios like i mentioned below (Private
chat).

----- Original Message -----
From: <alexzhang at gdnt.com.cn>
To: <deepanshu at huawei.com>
Cc: <discussion at sipforum.org>
Sent: Tuesday, May 29, 2007 3:24 PM
Subject: RE: [SIPForum-discussion] SIP Help


In the UAC, if the user specify the logical recipient of the invite
message, then the Request-URI is set as the same at most time. The
question is if the To header contains a user self-specified logical
name, who will be responsible for the translation from the logical name
to the routable address in the Request-URI? And if a proxy receives
initial invite message, can we say the To Header is useless because only
the Request-URI is used for routing during the tandem message routing.

Any comments are welcome!

Thanks,
ALEX
ESN: 8782

-----Original Message-----
From: Deepanshu [mailto:deepanshu at huawei.com]
Sent: Tuesday, May 29, 2007 2:00 PM
To: Alex Zhang
Subject: Re: [SIPForum-discussion] SIP Help

Request-URI is used for routing, To Header is used for indicating
logical
receiver.
They are same in the initial SIP INVITE request at most time. But have
some
exception.

One example is sending private message in the chat room. At that time,
the
Request-URI is conference
URI, the To header is the person who the sender want whisper with.


----- Original Message -----
From: <alexzhang at gdnt.com.cn>
To: <gujjenaveen at gmail.com>; <ken_ryon at hotmail.com>
Cc: <discussion at sipforum.org>
Sent: Tuesday, May 29, 2007 12:47 PM
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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