Phone is a SIP DECT/Mitel 610/612 DECT
When I switch on the phone first time I must write AC of the system. after few sec phone is in My LAB system. Then I type 1 {ext} and it send Me to the Administration menu, where I have User login, Sync system data, System credentional, Status, System, SIP user/device, Version.
On the main screen I have information Please Login.