Bla subscription period, Reference, Using a bla line on the ip phone – AASTRA 6700i series, 9143, 9480i, 9480i CT SIP Administrator Guide EN User Manual

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BLA Subscription Period

The 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.

Reference

For more information about setting the BLA Subscription Period, see the section,

Using a BLA Line on the IP Phone

If you have either a global or per-line BLA configuration, and you want to share a call on the line

with a BLA group, you need to press the Hold button before sharing the call with the group.

For example, if line 1 is configured for BLA, and you pick up a call on line 1, you must press the

Hold button to share the call with the BLA group.

If you pick up a call on line 1 configured for BLA, and another call comes in on line 2, you can

pick up line 2 without putting line 1 on hold. The line 1 call will be on hold automatically;

however it is on hold locally only. The line 1 call cannot be shared with the BLA group.

For global configuration of BLA:

In the "BLA Number" field, enter the Bridge Line Appearance (BLA) number to be shared across all
IP phones.

For per-line configuration of BLA:

In the "BLA Number" field, enter the Bridge Line Appearance (BLA) number to be shared on a
specific line.

Click

to save your changes.

Note:

The Hold button must be pressed for a call on a BLA line to be

shared with the BLA group.

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