Руководство Пользователя для AASTRA 53i

Operational Features

41-001160-00, Rev 01  Release 2.0

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Operational IP Phone Features

1

Click on Advanced Settings->Global SIP->Advanced SIP Settings.

2

Enter a value, in seconds, from 120 (2 min) to 3600 (1 hour) in the "BLF Subscription Period" field.

3

Click 

 to save your changes. 

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

4

Click on Operation->Reset.

5

In the "Restart Phone" field click 

 to restart the IP phone and apply the changes.