Aastra Telecom 9480i Series - Manual (Page 475)

Operational Features
41-001160-03, Rev 00, Releaes 2.4 5-177
Configuring 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.
Draft 1