I've done some work with alarm panels and VoIP over the years, generally it doesn't work 100% reliably (similar to FAXing over VoIP), plus there are some liability issues associated with it, but I'll leave that for the lawyers to sort out ;) ... Aside from sending the actual report, ContactID also requires an initial handshake to begin the report and a 1400Hz "kissoff" to end the report, which is the most important part. The alarm panel will continuously try to send the ContactID report if the kissoff isn't acknowledged by the central station. You need to be sure to the kissoff is acknowledged, otherwise the panel will be dialing all day long, unless it's setup with a limited set of retries before it gives up. Just my two cents. Cheers, Gabe On Tue, Nov 23, 2010 at 7:49 AM, Jim Lynch <jim@k4gvo.com> wrote:
On 11/06/2010 03:50 PM, Nazim Aghabayov wrote:
Hello Jim,
No need for a module, this functionality can be achieved with a simple LUA ivr script. http://wiki.freeswitch.org/wiki/Lua
Regards, Nazim
On 11/06/2010 11:37 PM, Jim Lynch wrote:
Alarmreceiver is an Asterisk application for the security industry. From the description of the module, "This application emulates an SIA (Ademco) Contact ID alarm receiver. The Contact ID protocol is the most popular signalling protocol used between alarm panels and central stations."
In reading the SIA documentation for an Alarm Receiver application, the device sends (and expects) both DTMF and single frequency tones depending on the situation. I see that dialplans can include checking for single frequency tones, but I didn't see any reference to being able to decode these from LUA. Is that something that would be easy to implement? Where might I start looking to do so? Sending of tones could be accomplished via a .wav file so that part is covered.
Thanks, Jim.
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