Aastra Telecom SISIP 57I CT - Manual (Page 72)

Basic Network Settings
4-6 41-001160-00, Rev 01 Release 2.0
IP Phone Administrator Guide
Configuring the IP Phones
.
Aastra Web UI
Step Action
1 Click on Advanced Settings->Network->Basic Network Settings.
2 Enable the "DHCP" field by checking the check box. (Disable this field by unchecking the box).
3 Click to save your settings.