What is the on-premise chat with the possibility of (video) calls?

Question

VoIP

Please give advice on which Linux software can be used to raise the server to implement the following functions:
chat
storage of chat on the server
encryption of data exchange
voice
transfer file transfer
optional video transfer

And which clients for Windows, Linux, Android platforms are suitable for such conditions.

Answer 1

Look in the direction of rocketchat - you can set up video calls in it
. There is also a matrix
. In principle, you can use some Jabber / XMPP / SIP, but after slack it looks like the last century.

Answer 2

Basically, any XMPP server that supports the Jingle protocol.
Here is a list of both servers and clients, there is also for android / iOS https://ru.wikipedia.org/wiki/Jingle_(%D0%BF%D1%80...
But both the protocol and the SIP server may also work. Specifically asterisk.I
would try ejabberd, I have a couple from a long time
ago.PS.It seems ejabberd now supports both SIP and XMPP, so take a look.

Answer 3

NextCloud

Answer 4

We use a bunch of Zulip + Jitsi, it's completely viable.
Of the obvious disadvantages - the mobile client is not convenient.