[OpenSIPS-Users] Parking a Call using b2b modules

[Bogdan-Andrei Iancu]

Hi Jayesh,

I see your point - if you do not want to send media to the caller (while 
in park), when you decide to park the call you can simply send back an 
180 ringing and then relay to call to a fake unexisting destination with 
timeout == "how long to keep the call in parking". That branch will 
timeout (as there is no UAS) and return to failure route (if not picked 
up in the mean while). if the target user registers in the mean while, 
you do the cancel stuff as initially described.

Once again, the b2b is not useful here - why? as there you your handling 
is at transaction level (call is not accepted, you play with multiple 
branches) and not at call level (handling 1 or more accepted calls)

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 18.06.2014 08:42, Jayesh Nambiar wrote:
> Hi Bogdan,
> Thanks for the reply. But the challenge with me is that I don't want 
> to use an additional component like a Media Server in this setup. The 
> idea is to get away with too many components which can act like point 
> of failures. Hence I was exploring the idea of parking the call in 
> Opensips itself and do the routing within Opensips without the need of 
> an external media server.
> Any possibility of this being done within opensips?? And the only 
> option that I can see for this is the b2b modules.
>
> --- Jayesh
>
>
> On Tue, Jun 17, 2014 at 8:44 PM, Bogdan-Andrei Iancu 
> <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>
>     Hi Jayesh,
>
>     For such scenario you do not need b2b at all. You can do it at
>     signaling level. How ?
>     - determine that the incoming call needs to be parked
>     - send the call to a media server to play some ringing via 183
>     early media (call still not accepted); also push DB record to with
>     the callid + user the call belongs to;
>     - if target user registers -> check in DB for parked calls -> if
>     yes, run a script to trigger the cancelling of that branch to
>     media server (see t_uac_cancel MI command
>     http://www.opensips.org/html/docs/modules/1.11.x/tm.html#id295912)
>     - original call will go into failure route (because of the
>     canceling) -> from there you can create a new branch to the newly
>     registered user.
>
>     I haven't tried, but it should work :)
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     http://www.opensips-solutions.com
>
>     On 17.06.2014 12:57, Jayesh Nambiar wrote:
>>     Hello All,
>>     I was trying to explore an option of parking a call on
>>     opensips using b2b modules with a trying or ringing response.
>>     More precisely, I was trying to do something like this:
>>     http://lists.opensips.org/pipermail/users/2010-October/014849.html
>>
>>     As soon as the call comes in, use b2b_logic to park the call. If
>>     the called user is registered, route the call; else keep the
>>     caller parked for 45 seconds, and within this duration if the
>>     called user registers, raise a E_REGISTERED event.
>>     Identify if there is a call parked for the user that just
>>     registered and if yes route the call or else respond with 408
>>     timeout to the caller.
>>     I thought, it should be possible using the b2b modules and the
>>     event interface that opensips got. Am I thinking in the right
>>     direction from possibility perspective?? Can someone help me
>>     understand if this logic can be implemented within the script??
>>
>>     Thanks in advance,
>>
>>     --- Jayesh
>>
>>
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>
>

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