[Serusers] RE: S-CSCF IMS

[Bernie Hoeneisen]

Hi Joao!

On Mon, 12 Jan 2004, Joao Sampaio wrote:

> For now I'm just interested in the S-CSCF because I want to make a lab
> implementation of the IMS so I only need the functions of the Home Network.

Maybe you could specify a bit more, what kind of S-CSCF functionality you
want to implement with SER. Home functionality is a bit to wide ranged
to provide you with a useful answer.

> P-CSCF is only need for roaming UE and I-CSCF can be optional.

Just FYI:

 According to 23.228 / 24.228 / 24.229 (3GPP IMS / Rel 5) the P-CSCF is
 required even in non-roaming scenarios. Too many tasks have been loaded
 to the P-CSCF. Of course, you might not need it in your lab scenarios or
 emulate its funcitionality, depending on what you want to test.

 Similar applies for I-CSCF, however you might easier get it skipped in
 your lab / tests.


> Why you you say that the extentions to SER will not be small? Have you
> already tried?

I agree with Kevin in general, that the extension to SER will not be
small, if you want to use SER for a fully functional S-CSCF (even without
roaming and without topology hiding). You might be able to replace partly
some functionaliy with SER, but again this depends on your test / lab
requirements.

cheers,
 Bernie


> Regards,
>
> João
>
>
> -----Original Message-----
> From: Kevin Chu [mailto:kevin.chu at viditec.com]
> Sent: segunda-feira, 12 de Janeiro de 2004 17:03
> To: Joao Sampaio
> Cc: SER Users
> Subject: RE: S-CSCF IMS
>
>
> Hello,
>
> As my understanding, I don't think it is possible to configure
> SER to work as a S-CSCF without any modification.
>
> On the other hand, I don't think the modification or extension
> will be small for SER working as a S-CSCF in IMS.
>
> I am just curious, but why you are interesting about using SER
> as S-CSCF only? How about the others, like P-CSCF and I-CSCF?
>
> Regards,
> Kevin
>
> ----------------------------------------------------------
> Date: Fri, 9 Jan 2004 17:19:30 -0000
> From: Joao Sampaio <est-j-sampaio at ptinovacao.pt>
> Subject: [Serusers] S-CSCF IMS
> To: "'serusers at lists.iptel.org'" <serusers at lists.iptel.org>
> Message-ID:
> 	<D397A7FACCC45A44A0A207FD892961EA08AEFD86 at mail.intra.cet.pt>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello,
>
> I want to ask if someone have already configured or have some idea how to
> configure SER to behave as a S-CSCF from the UMTS Realease 5 IMS?
>
> Thank you.
>
> Joco Sampaio
>