[asterisk-users] The plain old PBX functionality
A J Stiles
asterisk_list at earthshod.co.uk
Fri Aug 8 03:39:55 CDT 2014
On Friday 08 Aug 2014, Gergo Csibra wrote:
> 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
What you are looking for is a "Busy Lamp Field" (BLF). This can usually be
controlled by custom SIP headers (though naturally, every manufacturer's
implementation is ever so slightly different).
N.B. Be sure to *avoid* Digium phones if you want BLF functionality! Making
use of this feature would require you to pollute your system by installing a
toxic, binary-only module.
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