Bogdan, I don't understand how to make this with openser.
but I understand the keepalive mechanism
can you help me?
best regards
Javier Ramirez
 
----- Original Message -----
From: Bogdan-Andrei Iancu
To: Javier Ramirez
Sent: Wednesday, June 21, 2006 1:35 PM
Subject: Re: [Users] keep alive using RE-INVITE

Javier,

I guess the RFC3261 or google (SIP + reINVITE) are the best source for
looking into.

regards,
bogdan

Javier Ramirez wrote:

> Bogdan,
> I read that a lot of person use the RE-INVITE to keepalive the call
> but I donīt understand this.
> please, can you help me ?
> best regards
> Javier Ramirez

>
>     ----- Original Message -----
>     *From:* Bogdan-Andrei Iancu <mailto:bogdan@voice-system.ro>
>     *To:* Javier Ramirez <mailto:jvr_78@yahoo.com.ar>
>     *Cc:* users@openser.org <mailto:users@openser.org>
>     *Sent:* Thursday, June 08, 2006 7:14 AM
>     *Subject:* Re: [Users] keep alive using RE-INVITE
>
>     Hi Javier,
>
>     this is quite impossible to do - by sending re-INVITEs from a middle
>     point, you will break the CSEQ consistency between the end points.
>     Within the dialog, the cseq must increase from message to message
>     - if
>     you send a re-invite to point A with cseq n+1, after a while point
>     B may
>     sent a request with the same cseq since it was not aware that some
>     party
>     in the middle changed the number.
>
>     the best way to do it is if you have a end2end keepalive mechanism as
>     Session-Timer.
>
>     regards,
>     bogdan
>
>     Javier Ramirez wrote:
>
>     > Hi !
>     > I looking for a mechanism to keep alive, and I see that is used the
>     > RE-INVITE, but
>     > How to use the Re-INVITE to a keep alive mechanism ?
>     > exist another way to implement another keep alive mechanism ?
>     >
>     > best regards
>     > Javier ramirez
>     >
>     >------------------------------------------------------------------------
>     >
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>     >http://openser.org/cgi-bin/mailman/listinfo/users
>     >
>     >
>
>
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