IP OFFICE 2.1.27 4400 SETS INTERMITANTLY LOCKING UP

[gberezow]

I HAVE INSTALLED AN IP SWITCH. 406 WITH 4 DS 30S AND A 16 PORT POT MODUAL.
INTERMITTANTLY A PHONE WILL LOCK UP AND CANNOT BE USED. COLDSTARTING THE SET DOES NOTHING. THE PHONES ARE 4406S AND 4412S.NOT THE SAME PHONE EVERY TIME.
THE ONLY THING THAT SOLVES THE PROBLEM IS A COLDSTART OF THE ENTIRE SYSTEM.THIS IS NOT THAT EASY WITH THE NUMBER OF PHONES ON THIS SYSTEM.
HELP.

 

[Morrack]

Not the same phone every time, but perhaps the same DS30 module every time?