Security Alarm Considerations
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Posted by Frankster on December 31, 2005, 8:03 pm
Please log in for more thread options I'm about to install dsl into a home with a security alarm working off the phone line. What do I need to consider? Do I need to install a filter just like the ones that would go on each phone device? If so, where do I look for the alarm system wire to install the filter? Thanks, -Frank | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Kay Archer on January 1, 2006, 11:49 pm
Please log in for more thread options > like the ones that would go on each phone device? If so, where do I look
> for the alarm system wire to install the filter? > A. ask your alarm company. B. have your dsl provider install a pots splitter C. install your own pots splitter (should be instructions at www.broadbandreports.com) Take your choice. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Frankster on January 1, 2006, 8:25 pm
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If I install the dsl modem as usual, using filters only on the phone device, before contacting the alarm company, what kind of behavior can I expect? I would hope that the dsl circuit would work fine but would render the alarm system ineffective until the proper alarm filter was installed. Is this correct? -Frank >
>> I'm about to install dsl into a home with a security alarm working off
>> the >> phone line. What do I need to consider? Do I need to install a filter > just
>> like the ones that would go on each phone device? If so, where do I look
>> for the alarm system wire to install the filter? >> >
> A. ask your alarm company. > > B. have your dsl provider install a pots splitter > > C. install your own pots splitter (should be instructions at > www.broadbandreports.com) > > Take your choice. > > | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by David Ross on January 2, 2006, 11:21 am
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Frankster wrote: > If I install the dsl modem as usual, using filters only on the phone device,
> before contacting the alarm company, what kind of behavior can I expect? I > would hope that the dsl circuit would work fine but would render the alarm > system ineffective until the proper alarm filter was installed. Is this > correct? What alarms typically (and should) do is literally "seize the line" by opening a relay between the outside connection and all internal connections which allows it to hang up on any existing call before calling the alarm company. Given this setup your best bet is to put a DSL splitter/filter just after the NID (phone companies box) and split the line into voice and data. But many alarm guys don't like this because this allows something plugged into the "data" side to tie up the line if things aren't done right or if equipment fails. So they want to put their box ahead of the splitter. Which can degrade the DSL signals. Two lines are the EASIEST way to resolve this. Or deal with an alarm company that is reasonable and has equipment that will not muck up the DSL. YMMV | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by David Schwartz on January 2, 2006, 1:44 pm
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> If I install the dsl modem as usual, using filters only on the phone
> device, before contacting the alarm company, what kind of behavior can I > expect? I would hope that the dsl circuit would work fine but would > render the alarm system ineffective until the proper alarm filter was > installed. Is this correct? There is really no way to know what will happen. There are a long list of things that can go wrong. By the way, having your alarm company install an alarm-specific DSL filter is, IMO, one of the worst possible solutions. It still requires passing the DSL signal into the alarm box, where it runs unshielded around the alarm's circuit board. DS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||
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> phone line. What do I need to consider? Do I need to install a filter