Alternative to Skype (double N)

Question

Skype

You need something like Jabber for a small office, only with voice, video and conferences. Without intermediaries in the form of third-party services such as sipnet.

And it should also work behind the dumbest nat/firewalls.

In short, we need a universal secure voice channel for a limited group of people in the same domain.

I understand that you need your own sip server. However, such combines like the asterisk are generally useless here and there is no time to study. Maybe there are some simple solutions? Even if it's paid.

Answer 1

Maybe TeamSpeak?

Answer 2

Jazzist: Yes, well! We have been using mumble for a long time. I raise the server on my computer with one click, the people connect and everything is OK. Someone else's traffic does not drive through itself. The codec is good, presses well. Sound quality ok. The only thing is, of course, this is a client-server application, and not P2P, like Skype, and you need to have an external IP address or always keep a running server on some VDS. The server part is called murmur. speedex codec.
en.wikipedia.org/wiki/Mumble
en.wikipedia.org/wiki/Speex

Answer 3

Microsoft Lync 2010 if the infrastructure is on Microsoft

Answer 4

gmail

Answer 5

open fire

Answer 6

If you can pay, but easy to run, look at Communigate Pro - a combine, but start very quickly. Yes, using up to 5 accounts is free without any restrictions (during testing, we even raised SMPP)

Answer 7

BigBlueButton is the best for this task.