Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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IP Phone Model
Firmware Name
Example
T27G
69.x.x.x.rom
69.83.0.10.rom
T23P/G
44.x.x.x.rom
44.83.0.10.rom
T21(P) E2
52.x.x.x.rom
52.83.0.10.rom
T19(P) E2
53.x.x.x.rom
53.83.0.10.rom
Firmware Upgrade Configuration
Before upgrading firmware, you need to know the following:
Do not close and refresh the browser when the IP phone is upgrading firmware via web user
interface.
Do not unplug the network cables and power cables when the IP phone is upgrading firmware.
The following table lists the parameters you can use to upgrade firmware.
Parameter static.firmware.url
[1]
<y0000000000xx>.cfg
Description
It configures the access URL of the firmware file.
Example:
static.firmware.url = http://192.168.1.20/44.81.0.15.rom
Permitted
Values
URL within 511 characters
Default Blank
Web UI Settings->Upgrade->Select And Upgrade Firmware
[1]
If you change this parameter, the IP phone will reboot to make the change take effect.
Summary of Contents for T48G
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