AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 440)

41-001343-01 Rev 03, Release 3.2.2 5-163
BLF Subscription Period
On the IP phones, you can set the time period, in seconds, that the IP phone resubscribes the BLF
subscription service after a software/firmware upgrade or after a reboot of the IP phone.
In the configuration files, you enter the following parameter with a valid value to set the BLF
subscription period:
sip blf subscription period:
The minimum value for this 120 seconds (2 minutes). The default is 3600 (1 hour).
Setting this parameter to a value lower than 3600 allows the configured BLF feature to become
active more quickly after a software/firmware upgrade or after a reboot of the IP phone. If you
enter a value lower than 120 for this parameter, the default value (3600) will be used by the IP
phone.
You can configure this feature using the configuration files or the Aastra Web UI.
Configuring BLF Subscription Period
Use the following procedures to configure the BLF subscription period on the IP phone.
Configuration Files
To configure the BLF subscription period on the IP phones using the configuration files, see Appendix A, the
section, “Advanced SIP Settings” on page A-100.