Aastra Telecom SIP 57I - Manual (Page 355)

Operational Features
41-001160-00, Release 2.1, Rev 04 5-145
Configuring Operational Features
Operational IP Phone Features The following table shows the number of lines that can be set to BLA for each
model phone.
Configuring BLA
You can configure BLA on a global or per-line basis using the configuration files
or the Aastra Web UI.
Global BLA
You configure BLA on a global basis in the configuration files using the following
parameters:
sip mode
sip user name
sip bla number
You configure BLA on a global basis in the Aastra Web UI using the following
fields at Advanced Settings->Global SIP->Basic SIP Settings:
• Line Mode
• Phone Number
• BLA Number
IP Phone Model
Possible # of BLA
Lines
57i 9
57i CT 9
53i 9