[asterisk-users] life safety system and VOIP

Tue Feb 17 15:29:38 CST 2009

Jeff LaCoursiere wrote:
> I think the BAT SIGNAL is the answer.
>
> POTS lines have their issues as well - how many times did we redial to get 
> into our ISP's in the mid nineties?  I have trouble believing the fire 
> code actually spells out that dedicated POTS lines must be used.
>   
its the supervised that is relevent, not dedicated,. its not used as a 
dialup line, basically its just connected period and if it goes away for 
whatever reason the monitoring station knows immediately.

In Canada the technology is called DVACS and its basically just modems 
on the ends of a dry copper pair, not sure what its called elsewhere. I 
think at the monitoring station the dry pairs are not really dry but 
aggregated into some "Supermodem" kind of like the t1 equivalent of pots 
lines, I don't really know though. The technology is definately on the 
way out, and being replaced with the tcp based stuff to accomplish the 
same thing.

> Regradless I think another "hold harmless" just made it into my service 
> contract.
>
> j
>
> On Tue, 17 Feb 2009, Jon Pounder 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.
>>
>>
>>
>>
>>
>>
>>     
>>> 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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