FAQ - New phone system (CISCO)

FAQ - New phone system (CISCO)

What to do if no login to phone possible "phone is registering"
What to do if Jabber says "Chatroom has been deleted"?
CISCO Jabber for Windows doesn't let me sign in!
Jabber (Windows) uses 15% of my CPU ressources!
Where can I report an incident?
My phone shows the message "HTTP-error [500]!". What shoud I do?
How can I make my number available again in the Jabber client?
Am I no longer reachable if I am logged out on all devices?