[Freeswitch-users] Alarm, KISS OFF

Miha miha at softnet.si
Tue Apr 30 10:07:28 MSD 2013


so there real issue must be on line (bad conditions)?

Dne 4/30/2013 2:27 AM, piše Steve Underwood:
> 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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