[asterisk-users] life safety system and VOIP

[Don E. Wisdom]

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







> 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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