Before attempting to upload this firmware to your Cisco Unified Communications Manager (CUCM), ensure you have the following:
: Update the "Phone Load Name" in the device configuration or set it as the cluster-wide default in Device Defaults .
: If your phone is currently running a version earlier than 8.3(3) , you cannot jump directly to 9.4(2). You must first upgrade to an intermediate version (such as 8.5(2)) before applying the 9.4 load.
Even a routine upgrade can fail. Here is how to fix the most frequent problems:
. This package contains the software necessary to run the version 9.4(2)SR4 on the device. Purpose and Functionality
Verdict