At 18:39 08/02/2008, Alex Balashov wrote:

On Fri, February 8, 2008 11:17 am, Iñaki Baz Castillo wrote:

...

• But now imagine that user B sends a BYE after 2 hours using the same

From&To tags and Call-ID. This is terrible!!! OpenSer will notify a "Stop" action

Why would it do that? Call-IDs are supposed to be GUIDs (Globally Unique Identifiers) and never reused. You shouldn't really be seeing collisions of them on a UA that properly implements the generation algorithm for them and fulfills the requirements of the RFC on this point.

You should not, but you do.

Anyhow, I think the confusion is of architectural nature here. IMO, usage-based charging if placed anywhere than in the place where the charged service is actually produced and not in a proxy to it, which may not have accurate information. I.e., put CDR stuff in PSTN gateway.

-jiri

-- Jiri Kuthan http://iptel.org/~jiri/