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:
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
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
CP920
78.x.x.x.rom
78.84.0.80.rom