Re: Channel Vision whole house DSL filter

Robert L Bass wrote:
Alternatively, you can install a splitter
type filter at the demarcation point or
anywhere else *ahead* of the phones
and the alarm. This method filters
DSL from all of the existing jacks save
one. That one jack will be unfiltered.
Cheesy ASCII drawing follows:
/--[RJ31X]--[phones]
--[STREET]--|
\--[DSL Modem]

Just to be clear, a filter needs to be before any POTS (Plain Old Telephone Service) devices like alarm panels and phones. The alarm panel (via the RJ31X) needs to be before the phones.

/-[filter]-[RJ31X]-[phones]
--[STREET]--|
\--[DSL Modem]

If the alarm tech is concerned about not being first in the circuit assure him/her that a DSL modem cannot take a POTS line off hook. At least I have never seen it happen...

The last drawing on the web page below explains this sort of setup. Substitute "filter" for "DSL Splitter" and you will get the idea.

http://nassausecurity.com/rj31x.html
.

Relevant Pages

  • Channel Vision whole house DSL filter - Reply to all
    ... An RJ31 jack is typically used a line seizure device. ... that the alarm panel is able to dial out immediately when an alarm is ... DSL complicates the issues because some people want to be able to seize ... P-0411 ADSL Filter and Surge Module ...
    (comp.home.automation)
  • Re: Can a Napco system & DSL connection co-exist?
    ... The plug-in DSL ... better off using the split filter arrangement. ... Designed specifically for homes with alarm systems, ... uninterrupted DSL and HPN access even while the alarm system is dialing. ...
    (alt.security.alarms)
  • Re: SBC - do I need a tech install to get a splitter?
    ... connection is critical for proper alarm communications. ... recommended a DSL splitter (sometimes called a Trunk Filter) ... As you know,Digital Subscriber Line (DSL) service combines broadband ...
    (comp.dcom.xdsl)
  • Re: Can a Napco system & DSL connection co-exist?
    ... functioning of both dsl connection and alarm panel? ... communication with the alarm central.. ... The OP doesn't need to purchase the extra filter. ... Designed specifically for homes with alarm systems, ...
    (alt.security.alarms)
  • Re: Can a Napco system & DSL connection co-exist?
    ... you don't need a filter for the alarm panel to communicate with the ... the Excelsus Filter to eliminate even that small chance. ... uniterrupted DSL and alarm communication was to wire the PROT exactly as the ... panel is ahead of every other phone in the house. ...
    (alt.security.alarms)