Yealink SIP T2 Series Provisioning Manual page 19

Getting Started
Phone Model Firmware Name
SIP-T48G 35.x.x.x.rom
SIP-T22(P) 7.x.x.x.rom
To upgrade the IP phones' firmware in batch via auto provisioning, ask the distributor for
the firmware file, upload it to the provisioning server, and then specify the access URL in
configuration files.
##Specify the access URL of the firmware file.
firmware.url =
For example, enter "tftp://admin:password@192.168.1.100/7.7.0.50.rom" ("admin" is
replaced by the authentication user name and "password" is replaced by the
authentication password) in the "firmware.url =" field. During the auto provisioning
process, the IP phone connects to the provisioning server "192.168.1.100", and
downloads the firmware file "7.7.0.50.rom".
For more information on the parameter, refer to Description of Configuration Parameters
in CFG Files on page 55.
In addition to upgrading firmware manually via web user interface, or upgrading
firmware via auto provisioning, you can also upgrade firmware from lync server. For
Updating Lync Phone Firmware from Microsoft Lync Server.
more information, refer to
13