[SIPForum-discussion] Regarding user registratin

[Herve Jourdain]

Hi,

A REGISTER request is not mandatory before sending an INVITE. But you need
to know who you're going to send the INVITE to.

The point in registration is to have a "central" address book, which helps
resolving IP addresses.
Everyone registers to the REGISTRAR, and the PROXY can access the REGISTRAR
database to get the contact information of the target.
Thus, you can have 2 well known IP addresses for configuring a system (works
with DNS as well), or even 1 when REGISTRAR and PROXY are co-localized.

But if you know the details of the recipient of the call, like its IP
address, the port on which SIP is listening and the SIP Id - if any - then
you can perfectly make the call without any REGISTRAR or PROXY - kind of a
point to point call.

But in the configuration you describe, you will probably have to REGISTER to
get called, not to call, as the proxy can access the registrar and resolve
the call. But you need the target to have registered...

Hope it helps.

Regards,

Herve

-----Original Message-----
From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Hemant Senapati
Sent: mardi 29 juillet 2008 04:41
To: mjhorse at qq.com; neeraj.jain at samsung.com; discussion at sipforum.org
Subject: Re: [SIPForum-discussion] Regarding user registratin

hi all,
 I have a basic query. is a register request mandatory before sending
a outgoing invite request.whererever I have searched through it has
only been described for the UAS where it has to register before
receiving a invite request. What about the UAC when it sends an
outgoing invite request.



A) Will it have to register before sending an outgoing invite request?



The set up is having all the sip entities like registrar, proxy,UAC, UAS.



Thanks and regards

Hemant

ARICENT(formerly HUGHES SOFTWARE SYSTEM)



On 7/28/08, mjhorse <mjhorse at qq.com> wrote:
> Hi,
>  Registration Cancellation is provided by REGISTER mesage with Contact and
> Expire fields, while Expire is 0 and Contact indicates the endpoint to be
> deregistered. If you want to cancel all URI, Contact should be a "*".
>  using this syntax, it's at your disposal to determine how to deregister
> your URI.
>
>  ------------------
>   by mj
>
>
>
>  ------------------ Original ------------------
>   From:  "neeraj"<neeraj.jain at samsung.com>;
>  Date:  Mon, Jul 28, 2008 09:03 PM
>  To:  "discussion"<discussion at sipforum.org>;
>
>  Subject:  [SIPForum-discussion] Regarding user registratin
>
>
>   Hi all,
>
>  I have a doubt regarding user registration. When I am registering a user
> using pui at example.com and ICSI in the contatct header field. if the
> registration is successful , my UE will start receiving call foe that
> particular ICSI.
>  Now my application support 2 ICSI value and I want to re register the
user
> again. so how should I go about this.
>  Should I include both the ICSI value in the contact header for new
REGISTER
> message or only new ICSI is enough.
>
>  If I have to include both ICSI in the register message than how should I
de
> register the user for only one ICSI parameter.
>
>  Thanks in advance
>
>  Neeraj Jain
> Senior Software Engineer | Wireless Terminal Division | Samsung India
> Software Operations (P) Limited
> #66/1, Block ?B?, Bagmane Tech Park
> CV Raman Nagar, Bangalore ? 560093
> (+91) 9886271141 / neeraj.jain at samsung.com
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