[asterisk-users] Asterisk room monitor

[Ioan Indreias]

On Mon, Apr 12, 2010 at 8:19 PM, Mark Hulber <asterisk.admin at hulber.com> wrote:
> I want to use a voip speaker phone as a room monitor.  Requirements:
>
> A phone that I can set to auto answer in speaker mode.
> A phone with a good speaker phone.
> Ability to make the audio one way.  I want to monitor the room but not
> have my voice heard in the room.  Yes, the mute button can accomplish
> this also.
>
> I have been using the SPA942's around the house (the speaker is just ok
> but probably good enough).  Can I set one of these or a similar Cisco
> phone to auto answer in speaker mode?  Any ideas on an alternative phone
> that would allow this?
>
> The alternative is to just set up the call locally and then leave the
> room with the line open but ideally I'd like to be able to open up the
> monitor on demand.
>
> Thanks,
>
> MARK.

Hello Mark,

Please find bellow a dialplan proof-of-concept for your requirement
(is based on intercom module present in FreePBX and adapted to have
only one way audio for 60 secconds). We have tested with Linksys
SPA9XX phones and works fine (hint: clear regional=>call progres
tones=>page tone in order to cancel the page tone if you need to be
"super-silent").

HTH,
Ioan Indreias
www.modulo.ro

exten => _6XX,1,Answer
exten => _6XX,n,Set(_ALERTINFO=Alert-Info: Ring Answer)
exten => _6XX,n,Set(_CALLINFO=Call-Info: <uri>\;answer-after=0)
exten => _6XX,n,Set(_SIP_URI_OPTIONS=intercom=true)
exten => _6xx,n,SipAddHeader,${ALERTINFO})
exten => _6XX,n,SipAddHeader,${CALLINFO})
exten => _6XX,n,Dial(SIP/1${EXTEN:1},5,G(100))
exten => _6XX,100,Goto(200)
exten => _6XX,101,Goto(300)

exten => _6XX,200,ChanSpy(SIP/1${EXTEN:1})

exten => _6XX,300,Wait(60)
exten => _6XX,n,Hangup