Hi. I have a bunch of Yealink phones configured on the 3CX system and they work fine. I have bought a Yealink T48G IP telephone. This one has a nice large touch screen. When I access the admin page over the network, and configure the SIP server IP, ID and Password for the account and click Confirm it says "Register Failed". Here is a screenshot of the setup page: https://www.dropbox.com/s/e2vaxink4htwhv6/screenshot-yealink.jpg?dl=0 On other Yealink phones I have them setup and they work fine. Is there something specific for the T48G that I need to change one of the default settings? Thanks so much for any help. Been driving me crazy.