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Network Settings
41-001160-01, Rev 00, Releaes 2.3 4-11
Configuring Network and Session Initiation Protocol (SIP) Features
Using Option 77 User Class on the IP Phone
DHCP Option 77 User Class is sent in DHCP request packets from the phone to
the configuration server. This Option 77 defines specific User Class identifiers to
convey information about a phone’s software configuration or about its user's
preferences. For example, you can use the User Class option to configure all
phones in the Accounting Department with different user preferences than the
phones in the Marketing Department. A DHCP server uses the User Class option
to choose the address pool for which it allocates an address from, and/or to select
any other configuration option.
An Administrator can configure the DHCP Option 77 User Class via the
configuration files, the IP Phone UI, and the Aastra Web UI.
Configuring DHCP Option 77 User Class on the IP Phone
Use the following procedures to configure DHCP Option 77 User Class on the IP
Phone.
Notes:
1. If the User Class is not specified (left blank) in the DHCP request
packet, the phone does not send the User Class DHCP Option 77.
2. Multiple User Classes inside a DHCP Option 77 are not supported.
3. DHCP Option 77 may affect the precedence of DHCP Options,
dependent on the DHCP Server.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section, “DHCP Option
Settings” on page A-12.