Upgrading Firmware - Yealink SIP-T48G Administrator's Manual

To configure the network parameters for PC port:
1. Click on Network->PC Port.
2. Mark the As Router radio box in the PC Port Config block.
3. Enter the desired value in the IP Address, Subnet Mask, Start IP Address and End IP
Address field respectively.
4. Select the desired value from the pull-down list of Enable DHCP Server field.
5. Click Confirm to accept the change.
A dialog box pops up to prompt that settings will take effect after a reboot.
6. Click OK to reboot the phone.
This section provides information on upgrading the IP phone firmware. Two methods of
firmware upgrade:
Manually, from the local system for a single phone.

Automatically, from the provisioning server or Lync server for a mass of phones.

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
SIP-T48G
SIP-T22(P)
Note
You can download the latest firmware online:
http://www.yealink.com/DocumentDownload.aspx?CateId=142&flag=142.
Do not unplug the network and power cables when the IP phone is upgrading firmware.
Associated Firmware Name
35.x.x.x.rom
7.x.x.x.rom
Getting Started
Firmware Name Example
35.7.0.50.rom
7.7.0.50.rom
51