Yealink SIP-T2 SERIES Administrator's Manual page 941

Bluetooth device, and then pair and connect it again. Contact Yealink field application
engineer and your Bluetooth device manufacturer for more information.
'
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 IP 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.
Press the OK/√ key when the IP phone is idle to check the firmware version. For example:
44.80.0.90.
1
Item
Hardware version.
The hardware version for each IP phone
model is:
51: SIP VP-T49G

44
35: SIP-T48G

28: SIP-T46G

29: SIP-T42G

36: SIP-T41P

Troubleshooting
Description
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