AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN - Manual (Page 460)

41-001343-01 Rev 03, Release 3.2.2 5-183
BLA Subscription Period
The IP Phones include a SIP BLA subscription period parameter that allows an Administrator to
set the amount of time, in seconds, of the BLA subscription period.
If this parameter is set to 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 in the Subscribe message
received from the server, the phone uses the default value of 300 seconds.
You can configure this parameter using the configuration files or the Aastra Web UI.
Configuring the BLA Subscription Period
Use the following procedures to configure the BLA Subscription Period.
Configuration Files
To configure the BLA subscription period on the IP phones using the configuration files, see Appendix A, the
section, “Advanced SIP Settings” on page A-100.