Aastra 9143i Series Administrator's Manual page 190

IP Phone Administrator Guide
Network Settings
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
6751i
6753i
6755i
6757i
6757i CT
4-8
Identifier Value
AastraIPPhone9143i
AastraIPPhone9480i
AastraIPPhone9480iCT
AastraIPPhone51i
AastraIPPhone53i
AastraIPPhone55i
AastraIPPhone57i
AastraIPPhone57iCT
41-001160-03, Rev 00, Releaes 2.4