Video/Audio Calls over XMPP

Why you don't receive the Call symbol in your Mobile XMPP-App

With modern mobile apps like Conversations.im or its fork Blabber.im you are able to make Audio/Video-Calls from user to user via xmpp. That requires of course that both accounts are on a properly configured xmpp-server. You can check your server at Conversations' Compliance Test.

If you host your own xmpp server like me you will have to struggle a little with things like STUN and TURN to get that Call feature going but at least it's possible to manage and documentation how to configure your server accordingly is growing.

A very important information

... from this docs has to be highlighted as it cost me a lot of time and troubles:

Even if your servers are perfectly configured you will first receive no Call symbol in those apps!

At least this is the case for Blabber.im. Both accounts have to be online for it to appear. In our case this meant that I had to write my friend a text message and not before she answered by texting the phone symbol popped up immediately. Until this happened I was convinced that something is wrong with my ejabberd.yml and fiddled around - which obviously was absolutely unnecessary.