The Problem:
Avaya had been receiving reports of issues with the IP Office Unified Communications Module (UCM) going into ‘write protect’ mode and Preferred Voice mail shutting down. Avaya has determined that the fault was due to a deficiency in the microcontroller firmware and in response, Avaya Product Support has released a patch to eliminate the problem.
What products are affected?
Products that may have been affected were Unified Communications Module (700501442) with serial numbers from 
13WZ31xxxxxx and 13WZ43xxxxxx and all IP Office Release 8.1 and IP Office Release 9.0 are supported releases for this patch.
The units exhibiting this issue would have a PCS level 9 for the UCM unit and PCS level 04 for the on-board SSD drive. The PCS level for the UCM unit can be located on either the UCM shipping box (see figure 1) or on the UCM module itself (see figure 2). The PCS for the on-board SSD drive is located on the top right of the blue sticker that is attached to the drive (see figure 3).
The Solution:
The corrective action is to install a Critical Patch 
(CP) on the UCM through the UCM WebControl Application.
For more details on the patch, please reference the Product Support Notice PSN004105u or contact your local Avaya partner.
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