Aastra 9000i Series Administrator's Manual page 170

DHCP Options 60, 66, and 43 Server Configurations
Option 66
The IP Phones support download protocols according to RFC2131 and RFC1541 (TFTP, FTP,
HTTP,. HTTPS) to support DHCP option 66. Option 66 is part of the DHCP Offer message that
the DHCP server generates to tell the phone which configuration server it should use to download
new firmware and configuration files.
For DHCP to automatically populate the IP address or domain name for the servers, your DHCP
server must support Option 66. Option 66 is responsible for forwarding the server's IP address or
domain name to the phone automatically. If your DHCP server does not support Option 66, you
must manually enter the IP address or domain name for your applicable configuration server into
your IP phone configuration.
Options 60 and 43
The Aastra phones also support Option 60 and Option 43 as per RFC 2132.
Option 60 (Vendor Class Identifier) provides the DHCP server with a unique identifier for each
phone model. This enables a system administrator to send the phone a customized Server
Configuration in option 43.
The table below lists the identifier values for each phone model.
Model
9143i
9480i
9480i CT
6730i
6731i
6735i
6737i
6739i
6753i
6755i
6757i
6757i CT
The System administrator can use the Vendor Class Identifier to send the phone a customized
Server Configuration in option 43 (Vendor-Specific information).
41-001343-01 Rev 02, Release 3.2.2
Identifier Value
AastraIPPhone9143i
AastraIPPhone9480i
AastraIPPhone9480iCT
AastraIPPhone6730i
AastraIPPhone6731i
AastraIPPhone6733
AastraIPPhone6737i
AastraIPPhone6739i
AastraIPPhone53i
AastraIPPhone55i
AastraIPPhone57i
AastraIPPhone57iCT
Note: If Aastra IP Phones receive the server configuration from both
DHCP Option 66 and DHCP Option 43, then Option 43 takes precedence
over Option 66.
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