Aastra 9000i Series Administrator's Manual page 481

Aastra Web UI
1
For global configuration of BLA:
Click on Advanced Settings->Global SIP->Basic SIP Authentication Settings.
For per-line configuration of BLA:
Click on Advanced Settings->Line N (1-9).
In the "Line Mode" field, select the BLA option.
2 In the "Phone Number" field, enter the phone number of the IP phone.
5-204 41-001343-01 Rev 02, Release 3.2.2