Steve, so there is nothing I can do? It must be something on line? Is there any function/application that I can set so that this will help alarm device? Thanks! Miha On Tue, 30 Apr 2013 08:27:47 +0800 Steve Underwood <steveu@coppice.org> wrote:
The commonest alarm protocol is Ademco Contact ID and it variants. This is very undemanding of the channel, and it would take a pretty broken VoIP connection to stop them working. VoIP channels tend to fail for alarms when people ignore the fact that VoIP usually uses mains powered terminals, with no battery backup. A simple power outage means no 911/999/112/whatever calls, and no alarm protocols. That's the real weakness.
Steve
On 04/30/2013 02:15 AM, Steven Schoch wrote:
Speaking of alarm systems over VoIP, here's a story of an alarm company that was sued by the estate of a murdered woman because her alarm system failed to notify the central station when the attacker broke in. It turns out she had switched to VoIP a few weeks earlier, which caused problems:
http://www.security.honeywell.com/hsc/documents/alarmorg_VoIP.pdf
Here's something from an alarm company: http://www.thealarmcompany.com/files/voip%281%29.pdf And from another alarm company:
http://bentleyalarm.com/why-voip-is-bad-for-your-alarm-system/
Bottom line: I'd think really hard before switching an
alarm system to
VoIP. When we switched the company to VoIP, I was able to get a very inexpensive measured line for our alarm system. (We also use it for incoming FAX, because it works.)
-- Steve
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