Aastra Telecom 57I 用户手册

Operational Features

41-001160-00, Release 2.1, Rev 04

5-149

Configuring Operational Features

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.

3

For global configuration of BLA:
In the "BLA Number" field, enter the Bridge Line Appearance (BLA) number to be shared across all 
IP phones.

For per-line configuration of BLA:
In the "BLA Number" field, enter the Bridge Line Appearance (BLA) number to be shared on a 
specific line.

4

Click 

 to save your changes.