Aastra Telecom SIP 57I - Manual (Page 131)

Network Settings
41-001160-00, Release 2.1, Rev 04 4-7
Configuring Network and Session Initiation Protocol (SIP) Features
Configuring the IP Phones
IP Phone UI
Step Action
1 Press on the phone to enter the Options List.
2 Select Administrator Menu.
3 Enter your Administrator password.
Note: The IP Phones accept numeric passwords only.
4 Select Network Settings.
5 Select option DHCP.
6 Press Change to set "Use DHCP?" to "Yes" (enable) or "No" (disable).
7 Press Done to save the changes.