We're looking at porting our BT PSTN lines over to Voipfone in the near future, but are trying to trial a new number in the mean time.
I'm completely new to configuring SIP based lines and can't find much information anywhere on SIP configuration and Avaya IP Office, hence I'm here
This is the main SIP screen. Any ideas what I need to put in? When I try to make a call all I'm getting is a line not available error.