BLF without PBX

[complex1]

(02-24-2017 09:01 AM)abluemm Wrote:  Hi Forum,

a customer, with small branch uses a FritzBOX and two T48G. The FritzBOX does not support BLF. Can the phones check and show the line status?

The right keyword for google is enough for me.

Thanks in advance
Alex

Hi Alex,

Busy Lamp Field (BLF) is a light on an IP phone which tells you whether another extension connected to the same PBX is busy or not. When configured, the phone subscribes to a resource list available on an IP PBX to be notified with such information about other extensions. BLF works through the SIP protocol by making use of SUBSCRIBE and NOTIFY messages. In a normal scenario, the phone is the subscriber and the IP PBX is the notifier.

Long story short: If your FritzBox doesn’t support BLF, then you will never get it work for you.

Hope this helps.