Firmware Upgrade
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Firmware Upgrade
There are two methods of firmware upgrade:
l Manually, from the local system for a single device via the web user interface.
l Automatically, from the provisioning server for a mass of devices.
Note: We recommend that the devices 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.
All configurations will be cleared on the T23P/T23G/T21(P) E2/T19(P) E2 phones when downgrading the phones from firm-
ware version 84 to 83.
Topics
Firmware for Each Phone Model
Firmware Upgrade Configuration
Firmware for Each Phone Model
You can download the latest firmware online: http://sup-
port.yealink.com/documentFront/forwardToDocumentFrontDisplayPage.
The following table lists the associated and latest firmware name for each device model (X is replaced by the actual
firmware version).
IP Phone Model Firmware Name Example
T57W/T54W/T53W/T53
(T5W firmware unified)
96.x.x.x.rom 96.85.0.10.rom
T48U/T46U/T43U/T42U
(T4U firmware unified)
108.x.x.x.rom 108.84.0.30.rom
T48S/T46S/T42S/T41S
(T4S firmware unified)
66.x.x.x.rom 66.84.0.80.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 54.84.0.60.rom
T40G 76.x.x.x.rom 76.84.0.60.rom
T33P/T33G/T31P/T31G/T31/T30P/T30
(T3 firmware unified)
124.x.x.x.rom 124.85.0.10.rom
T29G 46.x.x.x.rom 46.83.0.30.rom
T27G 69.x.x.x.rom 69.84.0.80.rom
T23P/G 44.x.x.x.rom 44.84.0.60.rom
T21(P) E2 52.x.x.x.rom 52.84.0.60.rom
T19(P) E2 53.x.x.x.rom 53.84.0.60.rom
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