If you are able to enter the station number to re-provision a set I'm assuming you have Installer level access. Could it be that someone logged in with ESI system programmer and didn't synchronize first? Then when they sent programming it could have erased MAC addresses of recently added phones.....?

If it happens again check Function 31 and see of the MAC entry for the set is still there. If it is, try plugging the set into an Ethernet port on the same physical segment as the phone system.

I have seen Ethernet switches that were not kind to MAC authentication sometimes. Especially smart switches.


Brian Dunne
ETC Telecom
www.etctele.com