Aastra Telecom SIP 57I - Manual (Page 177)

Global SIP Settings
41-001160-00, Release 2.1, Rev 04 4-53
Configuring Network and Session Initiation Protocol (SIP) Features
Configuring the IP Phones .
Aastra Web UI
Step Action
1 For global configuration, click on Advanced Settings->Global SIP->Basic SIP Settings.