Can I make emergency calls using a Hot Desk phone?
8x8 Hot Desk service
Yes. In the UK, dial 999 just as you would on any other phone, whether or not you are logged in as a Hot Desk guest user. The physical location of the Hot Desk phone is registered as the emergency address of the call.
Apart from emergency calls, a Hot Desk host does not allow you to make or receive any calls when you are not logged in as a guest.