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Troubleshooting
581
Firmware and Upgrading Issues
Fail to upgrade the phone firmware
Do one of the following:
Ensure that the target firmware is not the same as the current firmware.
Ensure that the target firmware is applicable to the IP phone model.
Ensure that the current or the target firmware is not protected.
Ensure that the power is on and the network is available in the process of upgrading.
Ensure that the web browser is not closed or refreshed when upgrading firmware via web user
interface.
Verifying the firmware generation and phone version
Press the OK/
√
key when the IP phone is idle to check the firmware version. For example: 28.82.0.20.
Item
Description
1
28
Firmware ID.
The firmware ID for each IP phone model is:
70: T54S/T52S
35: T48G
28: T46G
66: T48S/T46S/T42S/T41S
29: T42G
36: T41P
54: T40P
76: T40G
46: T29G
45: T27P
69: T27G
44: T23P/G
Summary of Contents for T48G
Page 1: ...linekey X pickup_value ...
Page 8: ...Administrator s Guide for SIP T2 Series T4 Series T5 Series IP Phones iv ...
Page 72: ...Administrator s Guide for SIP T2 Series T4 Series T5 Series IP Phones 52 ...
Page 258: ...Administrator s Guide for SIP T2 Series T4 Series T5 Series IP Phones 238 ...
Page 264: ...Administrator s Guide for SIP T2 Series T4 Series T5 Series IP Phones 244 ...
Page 378: ...Administrator s Guide for SIP T2 Series T4 Series T5 Series IP Phones 358 ...