Yealink SIP T2 Series Provisioning Manual page 29

3. Enter the desired value in the Custom Option(128~254) field.
4. Click Confirm to accept the change.
During startup, the phone will broadcast DHCP request with DHCP options for obtaining
the provisioning server address. The provisioning server address will be found in the
received DHCP response message.
After the IP phone obtains the provisioning server address from the DHCP server, it will
connect to the provisioning server and perform the auto provisioning process during
startup.
For more information on the DHCP options, r
Obtaining the Provisioning Server Address
efer to Yealink IP Phones Administrator Guide.
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