Firmware Upgrade
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Firmware Upgrade
There are two methods of firmware upgrade:
l Manually, from the local system for a single phone via web user interface.
l Automatically, from the provisioning server for a mass of phones.
Note
We recommend that IP phones running the latest firmware should not be downgraded to an earlier firmware version. The
new firmware is compatible with old configuration parameters, but not vice versa.
Topics
Firmware for Each Phone Model
Firmware Upgrade Configuration
Firmware for Each Phone Model
You can download the latest firmware online:
http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage.
The following table lists the associated and latest firmware name for each IP phone model (X is replaced by the actual
firmware version).
IP Phone Model Firmware Name Example
T54S/T52S
(T5S firmware unified)
70.x.x.x.rom 70.84.0.10.rom
T48S/T46S/T42S/T41S
(T4S firmware unified)
66.x.x.x.rom 66.84.0.10.rom
T48G 35.x.x.x.rom 35.83.0.30.rom
T46G 28.x.x.x.rom 28.83.0.30.rom
T42G 29.x.x.x.rom 29.83.0.30.rom
T41P 36.x.x.x.rom 36.83.0.30.rom
T40P 54.x.x.x.rom 54.84.0.10.rom
T40G 76.x.x.x.rom 76.84.0.10.rom
T29G 46.x.x.x.rom 46.83.0.30.rom
T27G 69.x.x.x.rom 69.84.0.10.rom
T23P/G 44.x.x.x.rom 44.84.0.10.rom
T21(P) E2 52.x.x.x.rom 52.84.0.10.rom
T19(P) E2 53.x.x.x.rom 53.84.0.10.rom
CP920 78.x.x.x.rom 78.84.0.10.rom
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