I have a several Cisco IP Phone 303's that I recently switched from vocalocity to virtualpbx. Almost all of them switched over fine with the exception of 3 distinct phones. I can change the authentication information to virtualpbx on the web gui for the CISCO phones, and it changes and authenticates fine with VirtualPBX, everything works great. After a few hours though the phone somehow reloads the vocalocity settings that I had previously erased, overwriting the virtualpbx authentication information. I thought that maybe it might be that I still hadn't removed the extensions from Vocalocity, but it seems weird that it would only affect some of the phones instead of all of them. If anyone has any insight to this that would be great.