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I want to set up a VoIP system to allow people to remotely listen to given speeches in place.

We have a VoIP line which can receives up to 8 incoming calls. The soft will accept them with or without confirmation (we can work with a white list for example).

I tried Ekiga, but it seems not to manage multiple incoming calls. Linephone seems to be good, I succeeded to set a conference call between three SIP lines but I had to do it manually. Twinkle and Yate didn't work well (Linux Mint 17.x). I also saw pjsua, a command line soft, but not yet tested. So I need now some hints from the Internet.

PS: Allowing listeners to put their word in, for example by typing "*", would be a plus.

  • are you in particular looking for a SIP client, or is any other VoIP system welcome? – DJCrashdummy Jan 19 '17 at 0:29
  • We have a SIP line form an ISP. The best will be an "out-of-the-box" client. The least solution will be an API. I'm a developper, so I could also write the client myselft, but I rather not (free time issues, also I'm a beginner in Python wich seems to be the best solution). What kind of system are you thinking of ? – Amessihel Jan 19 '17 at 9:41
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well there are two ways that comes in my mind:

the first is sicking with SIP (which is fine)... so i would try Jitsi:

i have to add, that i don't like the GUI of Jitsi but the functions are pretty good!

maybe also Ring is worth a try since it is the successor of SFLphone and it uses PJSIP, therefore it is SIP-capable, just don't create a Ring-account...


the second way... for a "closed environment/user-base" Mumble is interesting:

  • it is also free (as in beer and speech)
  • Automatic Level Equalization
  • Noise Suppression
  • Priority Speakers
  • clients for several platforms (also Android and iOS)
  • it is often used by gamers with special features like in-app-Overlay or Positional-Audio, but they can be deactivated.

maybe create a separate room with password-protection on a public server or you can also host your own server (Murmur) to have full control.

  • I think I tried Jistsi (cannot retry now, I'm not there). Maybe I'm wrong, but although it supports conference calls, do I have to create them manually by filling SIP numbers/ids (i.e. it cannot manage multiple incoming calls) ? Also I will give a feedback if I'll try these softs you listed. Thanks ! – Amessihel Jan 26 '17 at 9:30
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Here's my feeling. I think we have the tools/bricks, but it's hard to find an out-of-the-box free software (or even free as free bier) solution.

The best way, in my humble opinion, is a to build a python-based apps with PJSUA module.

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You can try with Twilio. They are a little bit expensive, but they are the liders on this kind of applications.

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