Yealink SIP-T23P [80/841] Dhcp option 66 and option 43

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones

Yealink IP phones support obtaining the provisioning server address by detecting DHCP

options during startup.

The phone will automatically detect the option 66 and option 43 for obtaining the

provisioning server address. DHCP option 66 is used to identify the TFTP server. DHCP

option 43 is a vendor-specific option, which is used to transfer the vendor-specific

information.

To use DHCP option 66 or DHCP option 43, make sure the DHCP Active feature is

enabled.

Procedure

DHCP active can be configured using the configuration files or locally.

Configuration File

<y0000000000xx>.cfg

Configure DHCP active.

Parameters:

auto_provision.dhcp_option.enable

Local

Web User Interface

Configure DHCP active.

Navigate to:

http://<phoneIPAddress>/servlet?p

=settings-autop&q=load

Details of Configuration Parameters:

Parameters

Permitted Values

Default

auto_provision.dhcp_option.enable

0 or 1

Description:

Triggers the DHCP Option feature to on or off.

0-Off

1-On

If it is set to 1 (On), the IP phone will obtain the provisioning server address by

detecting DHCP options.

Web User Interface:

Settings->Auto Provision->DHCP Active

Phone User Interface:

None