[SIPForum-discussion] Intial Filter Criteria in SIP

[Bharat Sarvan]

Initial Filter Criteria is the term used in IP Multimedia Subsystems ( IMS).
Initial Filter Criteria contains Service Triggering Information in IMS. IFC
describes when an incoming SIP message is further routed to a specific
Application Server.

                                                    Initial Filter Criteria
                                                               |

-------------------------------------------------

|                                                |
                               Trigger
Point                            Application Server

|                                                |
                           Service Point Trigger                    Service
Information


Trigger Point describes the condition that should be checked to discover
whether the indicated Application Server should be contacted. Trigger Point
contains multiple instances of Service Point Trigger ( i.e. Request-URI,
>From Header, To Header, etc) which may be linked with logical expresssions
(AND , OR , NOT ).

Application Server defines the Application Server that needs to be contacted
when the Trigger Points are met. IFC is part of User Profile Stored on HSS.

- Bharat




On Sun, May 9, 2010 at 3:06 PM, prakash k <prakash_12305 at yahoo.co.in> wrote:

>   Hi all,
>
> I would like to know what is intial filter criteria(IFC)? where is used ?
> if possible can any one explain with example.
>
> Regards
> Prakash k
>
>
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