Справочник Пользователя для AASTRA 480i
![AASTRA](https://files.manualsbrain.com/attachments/b2f0cf80cb8afb35e4683acb8b17bf23f025ceb5/common/fit/150/50/b2d3a475ad529d43559bee574090d739264135619bc582db8eeb2580972a/brand_logo.jpeg)
Operational Features
5-36
41-001129-00 Rev 09, Release 1.4.1
IP Phone Administrator Guide
Operational Features
Aastra Web UI
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.