Yealink SIP-T2 Series, Administrator'S Manual

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
890
Item Description

45: SIP-T27P

Pending: SIP-T27G

44: SIP-T23P/G

52: SIP-T21(P) E2

53: SIP-T19(P) E2

37: CP860
2 80
Firmware generation.
Note: The larger it is, the newer the firmware
generation is.
3 0 A fixed number.
4 90
Firmware version.
Note: With the same firmware generation, the
larger it is, the newer the firmware version is.
’
Do one of the following:

Ensure that the configuration is set correctly.

Reboot the phone. Some configurations require a reboot to take effect.

Ensure that the configuration is applicable to the IP phone model.

The configuration may depend on support from a server.
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
respond with the preconfigured provisioning server address, so the IP phone will be