Verifying The Firmware Version; The Ip Phone Does Not Update The Configurations - Yealink SIP-T5 Series Administrator's Manual

Administrator's Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones

Verifying the firmware version

Press the OK/√key or select Menu > Status when the phone is idle to check the firmware version. For example
28.82.0.20.
Item
1 28
2 82
3 0
4 20

The IP phone does not update the configurations

Do one of the following:
Ensure that the configuration is set correctly.
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Reboot the phone. Some configurations require a reboot to take effect.
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556
Firmware ID.
The firmware ID for each IP phone model is:
97: T57W
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96: T54W
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95: T53W/T53
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108: T48U/T46U/T43U
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116: T42U
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35: T48G
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28: T46G
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66: T48S/T46S/T42S/T41S
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29: T42G
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36: T41P
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54: T40P
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76: T40G
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46: T29G
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69: T27G
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44: T23P/G
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52: T21(P) E2
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53: T19(P) E2
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78: CP920
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Major version.
Note: The larger it is, the newer the major version is.
A fixed number.
Minor version.
Note: With the same major version, the larger it is, the newer the minor version is.
Description