| Author |
Message |
Al Puzzuoli
Guest
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 Posted:
Wed Jan 12, 2005 5:37 am Post subject:
DSL and a home security system? |
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Hi all,
Just had another thought. I have a security system that when tripped
calls back to the alarm company. I spoke with a tech at the alarm
company this morning. He said that once I get DSL installed, I should
trip the system. If it reports back, then I'll be okay but if not, he
would send me a special filter.
This seemed like a good plan; However, he then indicated that sometimes,
even if the system is able to report back, since it is unfiltered, it
can cause problems with DSL performance. is this the case? Will the
alarm system cause interference even when it isn't actively using the
phone? If so, then it would seem that my best bet would be to ask him
to send the filter even if things appear to be working fine?
Any thoughts much appreciated,
--Al |
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Neil W Rickert
Guest
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| Posted:
Wed Jan 12, 2005 6:13 am Post subject:
Re: DSL and a home security system? |
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Al Puzzuoli <apuzzuoli@comcast.net> writes:
| Quote: | Just had another thought. I have a security system that when tripped
calls back to the alarm company.
|
http://www.broadbandreports.com/faq/223 |
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Kay Archer
Guest
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| Posted:
Wed Jan 12, 2005 8:02 am Post subject:
Re: DSL and a home security system? |
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| Quote: | This seemed like a good plan; However, he then indicated that sometimes,
even if the system is able to report back, since it is unfiltered, it
can cause problems with DSL performance. is this the case? Will the
alarm system cause interference even when it isn't actively using the
phone? If so, then it would seem that my best bet would be to ask him
to send the filter even if things appear to be working fine?
|
Every device* (including alarm systems), attached to the same phone
line/number as the DSL, must have a filter on it. Be glad you have a nice
alarm company, some charge $100 and up to install a DSL filter on the alarm
system.
*a sampling of devices:
fax machines
external ringers (good luck, these are often hardwired)
alarm systems (almost always hardwired: "requires a special filter provided
by your alarm company")
caller id boxes
answering machines
dial-up modems
credit card readers
some satellite boxes
a few cable boxes
and the extension out in the garage
I haven't run across the issue, but lamp ringers and TDY devices likely also
need filters.
Would you guys care to add to the list? |
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wkearney99
Guest
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| Posted:
Mon Jan 17, 2005 1:04 am Post subject:
Re: DSL and a home security system? |
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An alarm box doesn't need anything on a POTS line that would require it to
have unfiltered access. You should put it behind a filter.
What most alarm boxes are designed to do is have first access to the phone
line. This so they can cut off any existing phone calls to make immediate
calls to the reporting system. This would not be affected by being behind a
DSL filter.
Put it behind a DSL filter and be done with it. |
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w_tom
Guest
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| Posted:
Mon Jan 17, 2005 1:08 am Post subject:
Re: DSL and a home security system? |
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Understand what a filter does. The filter is not seen by
POTS devices such as conventional phones and alarm boxes.
POTS signals go right through a filter as if the filter did
not exist. But DSL cannot see anything on the other side of a
filter. If the alarm box connects directly to a DSL enhanced
wire, then the alarm box will short out DSL. That filter only
makes DSL not see and therefore not be shorted out by an alarm
panel. The filter does nothing to POTS devices such as an
alarm panel.
Al Puzzuoli wrote:
| Quote: | Just had another thought. I have a security system that when tripped
calls back to the alarm company. I spoke with a tech at the alarm
company this morning. He said that once I get DSL installed, I should
trip the system. If it reports back, then I'll be okay but if not, he
would send me a special filter.
This seemed like a good plan; However, he then indicated that sometimes,
even if the system is able to report back, since it is unfiltered, it
can cause problems with DSL performance. is this the case? Will the
alarm system cause interference even when it isn't actively using the
phone? If so, then it would seem that my best bet would be to ask him
to send the filter even if things appear to be working fine?
Any thoughts much appreciated,
--Al |
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