Aastra 9143i Series Administrator's Manual page 199

Aastra IP Phone UI
Step Action
1 Press Options, and then select Administrator Menu.
On the 6751i:
Press Services, and then select Options->Administrator Menu.
2 Select Network Settings.
3 Select DHCP Settings.
4 Select DHCP User Class.
5 In the "DHCP User Class" field, enter a DHCP User Class to apply to your phones, then press
DONE.
Valid values are up to 64 alpha-numeric characters. For example, "admin".
6 Restart the phone for the change to take affect.
41-001160-03 Rev 00, Release 2.5
Configuring Network and Session Initiation Protocol (SIP) Features
Network Settings
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