Aastra 9000i Series Administrator's Manual page 459

Aastra Web UI
1 Click on Advanced Settings->Global SIP->Advanced SIP Settings.
2 In the "BLA Subscription Period" field, enter a value, in seconds, that the phone waits to receive
a BLA subscribe message from the server. If you specify zero (0), the phone uses the value
specified for the BLA expiration in the subscribe message received from the server. If no value is
specified, the phone uses the default value of 300 seconds. Valid values are 0 to 3700. Default is
300 seconds.
3 Click
5-182
to save your changes.
41-001343-01 Rev 02, Release 3.2.2