[asterisk-users] The plain old PBX functionality

Ishfaq Malik ish at pack-net.co.uk
Fri Aug 8 03:25:15 CDT 2014

On 7 August 2014 21:06, Kevin Larsen <kevin.larsen at pioneerballoon.com>

> > back in the old analog telephony days there was "digital" PBX-es and
> > digital "system" phonesets. This phonesets have had many individual
> > illuminatable buttons connected with extensions. The PBX can show on
> > the buttons if some extension is ringing (blinks) or busy (constant
> > light), and the user can transfer the call with one touch (pressing
> > one of this button).
> >
> > I search this functionality in Asterisk. What versions, and what
> > extension functions (or other settings), and what VoIP phones can do
> > this?
> Asterisk has had this functionality for a long time. The terms you want to
> search for are BLF (Busy Lamp Field) and Subscribe. I imagine that most sip
> phones have the necessary features to do BLF. I know the Polycom phones I
> use certainly do. The Digium branded phones do as well.

Also certain models of Snom and Yealink phones.

Ishfaq Malik
Department: VOIP Support
Company: Packnet Limited
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