Yealink SIP-T2 SERIES Administrator's Manual page 942

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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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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Ensure that the configuration is applicable to the IP phone model.
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The configuration may depend on support from a server.
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Auto provisioning refers to the update of IP phones, including update on configuration
parameters, local phone book, firmware and so on. You can use auto provisioning on a
single phone, but it makes more sense in mass deployment.
Plug and Play (PnP) is a method for IP phones to acquire the provisioning server address.
With PnP enabled, the IP phone broadcasts the PnP SUBSCRIBE message to obtain a
provisioning server address during startup. Any SIP server recognizing the message will
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Item
54:SIP-T40P
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46: SIP-T29G

45: SIP-T27P
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44: SIP-T23P/G
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52: SIP-T21(P) E2
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53: SIP-T19(P) E2
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37: CP860
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Firmware generation.
80 Note: The larger it is, the newer the firmware
generation is.
0 A fixed number.
Firmware version.
90 Note: With the same firmware generation, the
larger it is, the newer the firmware version is.
Description