[Asterisk-Dev] Re: [Iaxclient-devel] Basic Conferencing from IAX2, other VoIP Channels

Steve Kann stevek at stevek.com
Wed Jun 2 16:21:56 MST 2004


I don't know how you'd implement exactly what you want to do, but while 
most office phones have "conf" buttons, the conferencing is most 
definitely done in the PBX, and not in the phones themselves.

-SteveK




On Jun 2, 2004, at 3:08 PM, Steven Sokol wrote:

> Asterisk's MeetMe is powerful and flexible, but sometimes you just 
> want to
> do an old-fashioned basic conference from the client, without having to
> transfer everybody into a conference room.  This is pretty common
> functionality on most office phone systems.
>
> Scenario:
>
> 1.  You (party A) are on an active call with party B.
> 2.  You decide to add in another party (C).
> 3.  You key the CONF button on your business set.
> 	- Party B gets MOH or silence.
> 	- Party B's appearance on your phone goes to the HELD state.
> 	- You get new dial-tone on a new appearance
> 4.  You dial the number for party C.
> 5.  Party C answers and you communicate briefly.
> 6.  You press the CONF key again to establish the conference
> 	- The bridging takes place in the PBX/KSU
> 	- Party B is pulled out of MOH-land and added to the new call
> 	- Party B's appearance returns to the ACTIVE state
>
> Now you are conferenced.  Both call appearances show active.  You can 
> even
> follow the same set of steps to conference in another user if you have
> additional appearances on your set.
>
> In Asterisk using most VoIP phones (soft or hard) this scenario does 
> not
> play out.  You wind up transferring party A into the MeetMe, calling 
> party B
> and transferring them into the MeetMe, then dialing into the MeetMe
> yourself.
>
> This is further complicated by the fact that any given static MeetMe 
> may or
> may not already be occupied by others doing the same thing.  Dynamic 
> MeetMes
> make this a bit more flexible, but there's little documentation to the
> dynamic feature.
>
> Is there an elegant way to execute dynamic conferencing in Asterisk?  
> Can
> this be done without building conferencing logic into the client UA?  
> If so,
> how?
>
> If not (which I think is the case), how do we add this in?  I have a 
> number
> of clients using my IAX Phone who are not really happy about having to 
> jump
> through hoops to handle spontaneous conferences.
>
> I would be happy to _try_ to code the solution into IAX2 (both 
> chan_iax2 and
> libiax2) if somebody can tell me where to begin.  I would think there 
> has to
> be some way to add in an IAX2 command to merge two calls or to command
> Asterisk to bridge the calls at the server.
>
> Also, is there a way execute such a conference from SIP, MGCP, H323, or
> other protocols?  If so, who wants to implement it?
>
> Any thoughts would be appreciated.  Apologies in advance if I missed 
> some
> really simple way of doing this.
>
> Thanks,
>
> Steve
>
> Steven Sokol
> Owner/Manager
> Sokol & Associates, LLC
>
> Phone:  816.822.1807
> IaxTel: 700.613.9004
> Web:    http://www.sokol-associates.com
>
>
>
>
>
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