Re: Can a Napco system & DSL connection co-exist?

[Robert L Bass <sales@xxxxxxxxxxxxxxxxxxxxx>]

On Tue, 21 Mar 2006 11:59:15 -0500, "news.vif.com"
<ebenze@xxxxxxxxxxx> wrote:

> Hi,
>
> I am looking at having a DSL line installed at my house that would be using
> the same telephone line as my Napco Magnum 1000.  The Napco currently does
> nightly self-tests which "seizes" the phone line in the house when it is
> performing these tests.  My concern with the DSL line is that the DSL link
> will be dropped every night as well when the Napco does its self tests.
>
> My question is the following.  If I split the phone line at the demarkation
> point where one branch goes only to my DSL modem and the other branch goes
> through a DSL filter and then to the Napco and the rest of the house, will
> the Napco still be able to make its nightly self-tests where it seizes the
> phone line, but doesn't drop my DSL connection?
>
> ie:
>
> Demarkation pt
> ==============[ Splitter ]
>  phone line                         |=====[DSL Modem]
>                                          |
>                                          |=====[ DSL Filter ] ------- [Napco
> Magnum 1000] ----------[ rest of house ]

That will work perfectly.  The DSL modem will not affect the
Napco panel as long as you have it filtered, either at the demarc
or via a plug-in filter for the RJ31X.

By splitting the line so that only the DSL modem is on the
dedicated run you will eliminate lost DSL signal during the Napco
self-test transmission.

Note:  Many DSL modems come with a port to plug in a standard
telephone.  The port is filtered so that you can use a phone or
fax there without needing a separate outlet.  This extra port
should not be used in your configuration.  Doing so will allow an
inadvertent off-hook to completely block the Napco system from
calling out.

> A friend of mine currently has a DSL connection on a regular line (no
> Napco), and sometimes uses a 56k modem on his computer to dial up to other
> servers.  If a 56K Modem is able to dial up over the DSL line, does this
> imply that the Napco should be able to as well?  I am assuming that Magnum
> 1000 just uses a regular modem to communicate with the centrale - is this a
> valid assumption?

As long as the line is filtered before going into the Napco panel
it will transmit.  If it's not filtered transmission will be
intermittent at best.  By using a split filter at the demarc with
all analog instruments on the seized side of the Napco panel you
are providing yourself with the best arrangement.

--

Regards,
Robert L Bass

Bass Burglar Alarms
The Online DIY Store
http://www.BassBurglarAlarms.com

--

Never underestimate the power of very stupid people in large
groups.