Sometimes when ShoreTel ShoreGear switches connected to infrastructure might have old version of the firmware. In theory ShoreTel HQ Director should upgrade firmware on devices to bring it to current version across the infrastructure. However sometimes that fails and there is a need to enforce apropriate firmware on device.

In order to enforce firmware on ShoreTel switch best is to logon to ShoreTel HQ Director server and issue burnflash command as shown below:

See full FAQ :

http://blog.skufel.net/2013/02/tips-tricks-burnflash-on-shoretel-shoregear-switches/

Sometimes burnflash process has to be repeated twice to upgrade firmware correctly.
After burnflash power off device for 20 seconds and power back on.