[SR-Users] openser as SIP AS in IMS environment...

[Jeff Brower]

Daniel-

> On 4/30/10 8:24 PM, Iñaki Baz Castillo wrote:
>> 2010/4/30 Jignesh Gandhi<Jignesh.Gandhi at moviuscorp.com>:
>>
>>> Hello All,
>>>
>>> Can openser be used as a SIP Application Server in an IMS infrastructure ?
>>>
>>> Should I use Kamailio instead ?
>>>
>>
>> By definition a SIP proxy is not a "SIP Application Server"(which in
>> most cases are B2BUA's).
>>
>
> Well, 'SIP proxy is not an SIP application server' is a bit forced. IMO,
> an application of SIP can be proxying SIP request, while most of the
> sites define couple of SIP server side entities like proxy, registrar,
> etc... these are just some types of applications for SIP.
>
> On the other hand, Kamailio is more than a proxy and it is in fact a
> real application server. It cannot be a VoIP application server,

It can be when combined with rtpproxy (and with accelerator PCI/PCIe card in some cases).

-Jeff

> since
> it does not do media processing, but can be a sip signaling application
> server and it is a lot you can do with signaling only (e.g., messaging,
> presence, custom communications and notifications).
>
>> However if you mean a "IMS SIP proxy/registrar" then OpenSer/Kamailio
>> could be valid (except for some custom requeriments of IMS). You can
>> take a look to OpenIMS which is OpenSer/Kamailio with some
>> "customization" or new modules designed for IMS.
>>
> This is indeed an app to look at, site is http://www.openimscore.org.
> AFAIK, they updated their code and practically they run same core and
> common modules as kamailio/ser 3.0
>
> To give the proper answer to the question, then the kind of application
> wanted to be deployed must be described.
>
> And kamailio is just the new name of openser, since there were some
> trademark issues with openser word. The sourceforge devel project still
> keeps openser name. Last version released under openser name was 1.3.x,
> the first under kamailio name was the next one 1.4.0. Version 3.0.x is
> the last stable one, with lot of enhancements since last version with
> openser name was released, see here what are the major enhancements
> coming with every release:
> http://www.kamailio.org/dokuwiki/doku.php#features