Aastra Telecom 53I, 57I CT, 55I Configuring BLA, Global BLA, Line Mode Phone Number BLA Number

Configuring Operational Features

Operational Features

The following table shows the number of lines that can be set to BLA for each model phone.

IP Phone Model	Possible # of BLA
	Lines
57i	9
57i CT	9
53i	9

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->GlobalSIP->Basic SIP Settings:

•Line Mode

•Phone Number

•BLA Number

Operational IP Phone Features

41-001160-00, Release 2.1, Rev 04 5-145