Aastra Telecom 57I C53I User Guide

Operational Features

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41-001160-00, Rev 01  Release 2.0  

IP Phone Administrator Guide

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. 

You must restart your IP phone for the changes to take affect.

5

Click on Operation->Reset.

6

In the "Restart Phone" field click 

 to restart the IP phone and apply the changes.