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[Freeswitch-users] RFC 4028 - SIP Session Timers


 
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ibc at aliax.net
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PostPosted: Tue Nov 18, 2008 10:10 am    Post subject: [Freeswitch-users] RFC 4028 - SIP Session Timers Reply with quote

Hi, I've read that FS supports/implements Session Timers to monitorice
both legs of a call. How to enable it? I mean:

alice ------- FS -------- bob

- alice calls bob vía FS
- FS calls bob.
- bob answers (sends 200 OK).
- "bypass_media" mode, no RTP through FS.
- FS establishes a SIP dialog with alice and other one with bob.
- From this moment FS starts sending periodically in-dialog
INVITE/UPDATE to both legs in order to check if each SIP dialog is
still alive in both endpoints.
- In case alice crashes (looses dialog info), alice will reply "481
Call/Transaction doesn't exist" when the in-dialog INVITE/UPDATE
arrives from FS, so FS will understand that alice has ended the dialog
(or has crashed) and sends a BYE to bob.

Is it possible with FS? how to enable it?


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Iñaki Baz Castillo
<ibc@aliax.net>
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ibc at aliax.net
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PostPosted: Tue Nov 18, 2008 6:36 pm    Post subject: [Freeswitch-users] RFC 4028 - SIP Session Timers Reply with quote

El Martes, 18 de Noviembre de 2008, Iñaki Baz Castillo escribió:
Quote:
Hi, I've read that FS supports/implements Session Timers to monitorice
both legs of a call. How to enable it? I mean:

alice ------- FS -------- bob

- alice calls bob vía FS
- FS calls bob.
- bob answers (sends 200 OK).
- "bypass_media" mode, no RTP through FS.
- FS establishes a SIP dialog with alice and other one with bob.
- From this moment FS starts sending periodically in-dialog
INVITE/UPDATE to both legs in order to check if each SIP dialog is
still alive in both endpoints.
- In case alice crashes (looses dialog info), alice will reply "481
Call/Transaction doesn't exist" when the in-dialog INVITE/UPDATE
arrives from FS, so FS will understand that alice has ended the dialog
(or has crashed) and sends a BYE to bob.

Is it possible with FS? how to enable it?


I've found those options in Sofia profiles:

<param name="enable-timer" value="false"/>
<param name="minimum-session-expires" value="120"/>

They seem to be related to SIP Session Timers (nothing related to RTP), am I
right?

Thanks.



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Iñaki Baz Castillo

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brian at freeswitch.org
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PostPosted: Tue Nov 18, 2008 6:38 pm    Post subject: [Freeswitch-users] RFC 4028 - SIP Session Timers Reply with quote

yes but RTP timers are in there too.

/b

On Nov 18, 2008, at 5:26 PM, Iñaki Baz Castillo wrote:

Quote:

They seem to be related to SIP Session Timers (nothing related to
RTP), am I
right?


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ibc at aliax.net
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PostPosted: Tue Nov 18, 2008 6:50 pm    Post subject: [Freeswitch-users] RFC 4028 - SIP Session Timers Reply with quote

El Miércoles, 19 de Noviembre de 2008, Brian West escribió:
Quote:
yes but RTP timers are in there too.

Well, but I expect that RTP timers parameters are the following:

<param name="use-rtp-timer" value="true"/>
<param name="rtp-timer-name" value="soft"/>
<param name="rtp-timeout-sec" value="300"/>
<param name="rtp-hold-timeout-sec" value="1800"/>


While SIP Session Timers parameters are those:

<param name="enable-timer" value="false"/>
<param name="minimum-session-expires" value="120"/>


Am I right? Thanks a lot.

--
Iñaki Baz Castillo

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