AASTRA 480i Manuale Utente

Operational Features

5-36

41-001129-00 Rev 09, Release 1.4.1  

IP Phone Administrator Guide

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.