AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 170)

41-001343-01 Rev 03, Release 3.2.2 4-7
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.
Option 43 consists of the following sub-options:
Model Identifier Value
9143i AastraIPPhone9143i
9480i AastraIPPhone9480i
9480i CT AastraIPPhone9480iCT
6730i AastraIPPhone6730i
6731i AastraIPPhone6731i
6735i AastraIPPhone6733
6737i AastraIPPhone6737i
6739i AastraIPPhone6739i
6753i AastraIPPhone53i
6755i AastraIPPhone55i
6757i AastraIPPhone57i
6757i CT AastraIPPhone57iCT
Sub-Option/Code Description
02 Configuration server (protocol, server, and path)
03 Redirection and Configuration Server (RCS) enable/disable