Has anyone encountered a system lockup with the Vodavi Mach 1 system. I have a Vodavi Mach 1 system ver. 3.09 with about 15 active phones and a 4 port Vodavi Talk Path voicemail system. In the last couple of months I have had the system lockup where all of the phones are displaying the time apparently when the system froze, some of the CO buttons along with certain DSS buttons are lit as well, same buttons on everyones phone. None of the buttons on the phones will work and if you reset an individual phone it will only come up showing the ver number of the system and never initialize. When plugging into one of the RS232 ports on the bottom of the KSU you cannot enter program mode, hitting the enter key does nothing. Once a hard reset is performed on the cabinets, this has an expansion cabinet, then everything starts working again, any suggestions on what might be causing this problem would be appreciated, thanks in advance.