Firmware Upgrade; Firmware For Each Phone Model Firmware Upgrade Configuration - Yealink SIP-T2 Series Administrator's Manual

Firmware Upgrade

There are two methods of firmware upgrade:
Manually, from the local system for a single phone via web user interface.
l
Automatically, from the provisioning server for a mass of phones.
l
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
T54S/T52S
(T5S firmware unified)
T48S/T46S/T42S/T41S
(T4S firmware unified)
T48G
T46G
T42G
T41P
T40P
T40G
T29G
T27G
T23P/G
T21(P) E2
T19(P) E2
CP920
Firmware Name
70.x.x.x.rom
66.x.x.x.rom
35.x.x.x.rom
28.x.x.x.rom
29.x.x.x.rom
36.x.x.x.rom
54.x.x.x.rom
76.x.x.x.rom
46.x.x.x.rom
69.x.x.x.rom
44.x.x.x.rom
52.x.x.x.rom
53.x.x.x.rom
78.x.x.x.rom
Firmware Upgrade
Example
70.84.0.10.rom
66.84.0.10.rom
35.83.0.30.rom
28.83.0.30.rom
29.83.0.30.rom
36.83.0.30.rom
54.84.0.10.rom
76.84.0.10.rom
46.83.0.30.rom
69.84.0.10.rom
44.84.0.10.rom
52.84.0.10.rom
53.84.0.10.rom
78.84.0.10.rom
93