Javier,

reInvites would have to be generated by some dialog stateful component of the call.

Depending on your network setup, this could be either endpoints or some B2BUA in the middle.

openSER is not dialog stateful (openSER is transaction stateful ) and thusly cannot generate reInvites.

Hope this helps

T.R.

From: users-bounces@openser.org [mailto:users-bounces@openser.org] On Behalf Of Javier Ramirez
Sent: Friday, June 23, 2006 11:28 AM
To: Bogdan-Andrei Iancu
Cc: users
Subject: Re: [Users] keep alive using RE-INVITE

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 don´t 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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