Want to upgrade just a specific 7971G-GE IP Phone that is registered on CUCM 6.0(x).
Currently CUCM's "Device Defaults" configuration tells me that the actual version
for this model is SCCP70.8-3-2S. I want to install the latest one - 8.5(3), which is
compatible with my CUCM's version.
Of course, I do not need to upgrade other IP Phones of the same model - just one 7971G-GE.
But frankly I don't understand how to perform this.
Installing "cmterm-7970_7971-sccp.8-5-3.cop.sgn" will overwrite "Device Defaults" value
that force all existing 7971G-GE IP Phones to upgrade. This is not the task, you know.