[Freeswitch-dev] simultaneous interpretation conference system

Michael Collins msc at freeswitch.org
Wed Feb 13 20:24:30 MSK 2013

Oh, I forgot to mention: regarding DTMFs, you'll need to modify the
conference profile not to use whatever keys you want the callers to use.
Just remove them from the profile. (See
conf/autoload_configs/conference.conf.xml where there's all sorts of key
bindings like 0=mute/unmute)

You could listen for DTMF events, but most likely you'll need to set
verbose_events to true so that you get all the event headers, not just the
pre-selected ones. I like to use fs_cli for tinkering with events so that I
can see what's going on. Check out the /events and /filter commands. Also
see chapter 4 of the FreeSWITCH Cookbook.


On Tue, Feb 12, 2013 at 4:20 PM, Michael Collins <msc at freeswitch.org> wrote:

> Hello Jamie,
> I think you're on the right track with the 'relate' setting for members.
> That will allow you to control who hears whom. I'm not aware of anyone who
> has done anything quite like this but I'm sure that if you can keep track
> of which 'mode' each conference member puts himself in then you could have
> a program to control everything.
> If you are looking at a DIY project then come join us in #freeswitch on
> irc.freenode.net and we'll talk in realtime. There are a few telephone
> geeks in there. :)
> If you'd like professional assistance you can always email
> support at freeswitch.org and they can help you with scope, pricing, etc.
> Thanks,
> Michael
> On Mon, Feb 11, 2013 at 6:31 AM, Jamie McClelland <jm at mayfirst.org> wrote:
>> Hi freeswitch devs,
>> This is my first post to the list so I want to start by thanking you for
>> the great work you have done on Freeswitch. And, sorry for the long
>> post! I have specific questions at the bottom...
>> I'm looking for advice on how to build a simultaneous intrepration
>> conference call system.
>> The way we'd like it to work:
>> The system is required to handle two languages, but the ability to
>> handle more than two languages would be an added bonus. For the purposes
>> of this description, I'm giving the example of spanish and english. The
>> conference call would have spanish-only, english-only, and bi-lingual
>> speakers. In addition, one or more interpreters would be on the call.
>> Bi-lingual speakers would participate in the call like it was a normal
>> conference call. They would hear speakers in the original english or
>> spanish, and would have the option of speaking either english or spanish
>> based on their preferences.
>> The english-only and spanish-only speakers would press 1 to hear a live
>> intrepretation of the call. When spanish is spoken on the call, an
>> english intrepretaton would be heard. When English is spoken, a spanish
>> interpretation would be heard. This would only affect what they hear -
>> they could still speak into the main conference. Participants would
>> press 0 to return to hearing the main conference call.
>> The interpreters would press 2 to enter interpretation mode. During this
>> mode their voice is not heard on the main conference, instead it's only
>> heard by people who have pressed 1 to hear the interpretation. When
>> english is spoken, the intrepret to spanish and vice-versa. They could
>> press 0 to return to the normal conference mode.
>> Ideas on how to implement:
>> First - has anyone implemented anything like this already?
>> Based on the wiki docs, I think the conference relate function would be
>> ideally suited for ensuring people who press 1 only heard the audio from
>> people who have press 2 and for reversing the effect when 0 is pressed.
>> Any ideas on a better way?
>> The next problem is how to capture the digits pressed by conference call
>> participants. I *think* this could be done by running a process that
>> listens for freeswitch events. However, I'm not sure how much
>> information is sent with the event. It would need to pass the conference
>> id, the user id, and the digit they pressed. Is that information sent by
>> the event handler? Or, is there a more elegant way to capture
>> key-presses by conference participants?
>> Thanks in advance for any light you can shed on this topic,
>> jamie
>> --
>> Jamie McClelland
>> May First/People Link
>> Growing networks to build a just world
>> http://www.mayfirst.org
>> https://support.mayfirst.org
>> OpenPGP Key: http://current.workingdirectory.net/pages/identity/
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://wiki.freeswitch.org
>> http://www.cluecon.com
>> FreeSWITCH-dev mailing list
>> FreeSWITCH-dev at lists.freeswitch.org
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
>> http://www.freeswitch.org
> --
> Michael S Collins
> Twitter: @mercutioviz
> http://www.FreeSWITCH.org
> http://www.ClueCon.com
> http://www.OSTAG.org

Michael S Collins
Twitter: @mercutioviz
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-dev/attachments/20130213/325bba3c/attachment.html 

Join us at ClueCon 2011 Aug 9-11, 2011
More information about the FreeSWITCH-dev mailing list