The new Grandstream GXP2110 will not take a download of the 3CX phone book. The 2010's work with the phone book. We have working 2010's on TFTP and HTTP. Neither TFTP nor HTTP work with the 2110. 2110's never finish the boot process.
Good new is that it is possible to log on to the phone and change the setting back to 'no' then reboot the phone.
Edit: Looks like this is a GXP2110 problem. See http://forums.grandstream.com/forums/in ... oard=122.0