[asterisk-users] life safety system and VOIP
Jonn Taylor
jonnt at taylortelephone.com
Tue Feb 17 16:09:14 CST 2009
Jon Pounder wrote:
> 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.
>
The dial tone for the phone line still comes from the CO. The phone
companies loop there copper cable in and out of the remote cabinets.
> 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.
>
This is true, that is why most fire panels have to have 2 phone lines.
>
>
>
>
>
>
>
>
>>
>>
>>
>>
>>
>> > 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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