Got a few of the above phones (NEC ITK-6DGS-1) for a small office, to put on the SV9500. Immediately after turning on, they show different screens from the usual DT700/800/900 terminals. It's trying to download something, it fails and reboots. Its menus look different, and the usual default admin password doesn't work on them. They are brand new. Are these standard SIP phones for the NEC 3CX, rather than proprietary SIP for the SV systems? Can they be made to work with SV9500