[asterisk-users] life safety system and VOIP

Tue Feb 17 15:25:35 CST 2009

Don E. Wisdom wrote:
>
>
>
> On 2/17/09 2:05 PM, "Jon Pounder" <jonp at inline.net> wrote:
>
>     Jeff LaCoursiere wrote:
>     > What do you suppose we have as liability if we are asked to
>     install such
>     > systems? Is it the responsibility of the business owner that
>     orders the
>     > system to meet all applicable codes? If (god forbid) someone was
>     hurt in
>     > such a situation and the alarm didn't get passed because of being
>     > delivered by VoIP for whatever reason, does the system installer
>     have any
>     > liability?
>     >
>
>     >well here's a question - which is more reliable ?
>     >- a single copper line dialed on demand when there is a problem
>     >- voip or other internet technology, using internet connections on
>     more
>     >than one media (say phone and cable), voip connected to multiple
>     servers
>     >in a failover configuration.
>
>     >its not uncommon for even a house to have multiple internet
>     connections,
>     >but how many buildings have phone lines that connect back to different
>     >CO's and fail over ?
>
>     >The best bet if you really care about what you are trying to
>     protect is
>     >make sure the message can get out as many ways as possible, whether it
>     >be phone, voip, network, cellmodem, etc. Forget what regulations
>     >require, no one says you can't go further than the minimum if you
>     want.
>
>     In a REAL emergency internet/cell is more likely to fail than the
>     phone companys pots network.
>     Cable/DSLAM etc only have about 4 hours of battery power. The CO
>     has a entire battery room which will last a whole lot longer. Not
>     to mention that it may stay up longer than your VoIP network. You
>     also have to take into account everything between you& the CO or
>     cable company. If just ONE thing fails you loose voip. Copper is a
>     lot more forgiving & has failover modes versus the phone co’s ATM
>     network or the cable companies “network” (or lack there of)
>
>     --Don
>

I don't know if thats really true any more, all the new areas around 
here have satellite CO's where fibre comes out to a box on the street 
with some batteries etc and copper runs out from there - great for dsl 
since its close, but at the mercy of whatever batteries are in there.

maybe your alarm needs to report in since there is a fire in your phone 
equipment - what then ?

I have seen every type of media go down or have problems no matter how 
stable - the only answer is have more than one so you always have a 
backup. Poles get hit, cables get cut, equipment breaks, its just a fact 
of life.

>
>
>
>
>
>
>
>     > j
>     >
>     > On Tue, 17 Feb 2009, Jason Aarons (US) wrote:
>     >
>     >
>     >>
>     http://www.iccsafe.org/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=001650
>     >> ;p=1
>     >>
>     >>
>     >> I can't see the Dept Transportation running copper to all the
>     motorist
>     >> aid boxes along the highway. I thought most of your alarm panels
>     have
>     >> moved to GSM/CDMA backup communications. I'd like to see a fire
>     >> marshall not give a permit for having a VoIP ATA or Vonage.
>     >>
>     >>
>     >>
>     http://www.iccsafe.org/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=001650
>     >> ;p=1
>     >>
>     >> It's permitted in Chapter 8 2002 & 2007 "Alternative Methods of
>     >> Communication" and these still have supervision in accordance
>     with Chap
>     >> 4 and it's sub-section.
>     >>
>     >> 8.5.2.2* Alternate Methods.
>     >> 8.5.4 Other Transmission Technologies.
>     >>
>     >> 8.6.2.2* Alternate Methods.
>     >> 8.6.4 Other Transmission Technologies.
>     >>
>     >> There is nothing specific with regards to voice over internet
>     protocal
>     >> and leaves room to add new technology proposals with requirements in
>     >> future editions according to A8.5.2.2. or A8.6.2.2 respectively.
>     >>
>     >>
>     >> -----Original Message-----
>     >> From: asterisk-users-bounces at lists.digium.com
>     >> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Jeff
>     >> LaCoursiere
>     >> Sent: Tuesday, February 17, 2009 3:28 PM
>     >> To: Asterisk Users Mailing List - Non-Commercial Discussion
>     >> Subject: Re: [asterisk-users] Credit Card processing machines
>     >>
>     >>
>     >>
>     >> On Tue, 17 Feb 2009, Jonn Taylor wrote:
>     >>
>     >>
>     >>> If you are in the US, ANY life safety system has to be
>     connected to a
>     >>> dedicated copper POTS line. VOIP is NOT ok to use for this. It
>     is in
>     >>>
>     >> the
>     >>
>     >>> NFPA.
>     >>>
>     >>>
>     >> What is the NFPA? Do analog extensions in traditional PBXes count?
>     >>
>     >> j
>     >>
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