User Manual

Troubleshooting
373
Firmware and Upgrading Issues
Why doesn’t the Skype for Business phone upgrade firmware
successfully?
Do one of the following:
 Ensure that the target firmware is not the same as the current firmware.
 Ensure that the target firmware is applicable to the Skype for Business phone model.
 Ensure that the current or the target firmware is not protected.
 Ensure that the power is on and the network is available in the process of upgrading.
 Ensure that the web browser is not closed or refreshed when upgrading firmware via web
user interface.
 Ensure that the target firmware on the Skype for Business Server is available.
How can I verify the firmware generation and version of the Skype for
Business phone?
Press the OK key when the Skype for Business phone is idle to check the firmware version. For
example: 28.8.1.65.
Item
Description
1
28
A fixed number for each Skype for Business
phone model.
 35: T48G
 28: T46G
 29: T42G/T41P
 54: T40P
2
8
Firmware generation.
Note: The larger it is, the newer the firmware
generation is.
3
1
A fixed number.