Yealink Yealink SIP-T42G, Administrator'S Manual

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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http://www.ietf.org/rfc/rfc2132.txt?number=2132 .
If you do not have the ability to configure the DHCP options for discovering the
provisioning server on the DHCP server, an alternate method of automatically
discovering the provisioning server address is required. Connecting to the secondary
DHCP server that responds to DHCP INFORM queries with a requested provisioning
server address is one possibility. For more information, refer to
http://www.ietf.org/rfc/rfc3925.txt?number=3925 .
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 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