Yealink SIP-T48G Administrator's Manual page 40

Microsoft Lync Edition Administrator's Guide for SIP-T2_Series and T4_Series IP Phones
Parameter
Servers
Vendor-Specific
Information
Vendor Class
Identifier
TFTP Server
Name
Boot file Name
Lync Server
For more information on DHCP options, refer to
http://www.ietf.org/rfc/rfc2131.txt?number=2131
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.
The following shows the common options when deploying Yealink IP phones with
Microsoft ® Lync
https://technet.microsoft.com/en-us/library/gg398088%28v=ocs.14%29.aspx.
Yealink IP phones support obtaining the provisioning server address by detecting DHCP
options during startup.
The phone will automatically detect the option 66 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. The administrator can use vendor class identifier, specified by DHCP option
60, to send the phone a customized configuration in option 43. Depending on the
28
DHCP Option
43 (vendor class ID:
CPE-OCPHONE)
43 (vendor class ID:
MS-UC-Client)
60
66
67
120
TM server. For more information, refer to
Description
client by IP address.
Specify virtual local area network (VLAN)
ID.
Specify Lync Server pool certificate
provisioning service URL.
Identify the vendor type.
Identify a TFTP server when the 'sname'
field in the DHCP header has been used for
DHCP options.
Identify a boot file when the 'file' field in the
DHCP header has been used for DHCP
options.
Specify a list of Lync servers available to
the client.
or