<div dir="ltr">Using the BLFs on Digium phones does not require the use of the Digium Phone Module for Asterisk, or DPMA. SchmoozeCom (the FreePBX guys) use the BLFs on Digium phones independently of the DPMA.<div><br></div>
<div>I am not sure why a previous response refers to this module as 'toxic'. It is a free to use module which allows a host of Digium phone features to be quickly implemented with Asterisk, like security-enhanced auto provisioning.</div>
<div><br></div><div>Digium phones are the only SIP phones in the world designed specifically to work with Asterisk, and each purchase helps to fund the ongoing development of open source Asterisk. In addition, they have a JavaScript API that allows anyone that wants to create custom apps on the phone to do so.</div>
<div><br></div><div>They can, of course, work with any standard SIP system and can be provisioned using FTP/HTTP(S) and XML files, just like any other phone.<br><br>On Friday, August 8, 2014, A J Stiles <<a href="mailto:asterisk_list@earthshod.co.uk" target="_blank">asterisk_list@earthshod.co.uk</a>> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Friday 08 Aug 2014, Gergo Csibra wrote:<br>
> Hi,<br>
><br>
> back in the old analog telephony days there was "digital" PBX-es and<br>
> digital "system" phonesets. This phonesets have had many individual<br>
> illuminatable buttons connected with extensions. The PBX can show on<br>
> the buttons if some extension is ringing (blinks) or busy (constant<br>
> light), and the user can transfer the call with one touch (pressing<br>
> one of this button).<br>
><br>
> I search this functionality in Asterisk. What versions, and what<br>
> extension functions (or other settings), and what VoIP phones can do<br>
> this?<br>
<br>
What you are looking for is a "Busy Lamp Field" (BLF). This can usually be<br>
controlled by custom SIP headers (though naturally, every manufacturer's<br>
implementation is ever so slightly different).<br>
<br>
N.B. Be sure to *avoid* Digium phones if you want BLF functionality! Making<br>
use of this feature would require you to pollute your system by installing a<br>
toxic, binary-only module.<br>
<br>
--<br>
AJS<br>
<br>
Note: Originating address only accepts e-mail from list! If replying off-<br>
list, change address to asterisk1list at earthshod dot co dot uk .<br>
<br>
--<br>
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</blockquote></div>
</div>