Comments on: Alarm System Interrupting DSL Internet Service, and a Fix

By: proudgeek

proudgeek — Fri, 14 Oct 2011 18:28:30 +0000

I don’t have a good answer, except to perhaps try installing the dsl filter at each telephone jack not being used for DSL …

By: Sergei

Sergei — Fri, 14 Oct 2011 17:11:30 +0000

Thank you for the good suggestion. I have the same problem with my DSL service. When I installed the filter at the alarm the DSL service improved, but the dial tone in the phone line disappeared!What should I do? Please help! I have five telephone jacks, including alarm.

By: Jeff Creekbaum

Jeff Creekbaum — Thu, 11 Aug 2011 03:53:48 +0000

To be more clear, you can buy a Alarm panel DSL filter which does this or you can place a standard DSL filter on both the incoming and outgoing lines of your panel. Since this is essentially what an alarm DSL filter does.

By: Jeff Creekbaum

Jeff Creekbaum — Thu, 11 Aug 2011 03:51:18 +0000

For those of you wanting to use a standard DSL filter I thought I’d give you a bit of info. Alrm panels use what is called a RJ-31x jack rather thatn the standard RJ-45 (Ethernet) jack to connect a phone line (at least if they follwed set standards when they installed it. The difference is that of the 8 positions available in an RJ-45 only 4 are used and they are the outermost pair and the inner most pair. An alarm panel must have the ability to overide any phone calls being made at the time of the alarm. So how this is managed is the phone line coming into the house use position 3&4 (innermost pair) and then sends the phone line back out on the outermost pair of wires 1&8. that way, the panel can hang up, make its call and then reconnect your line. Anyone needing more info can hollar at me at jethrocreek@yahoo.com.

By: DSL Filters

DSL Filters — Fri, 11 Feb 2011 17:27:35 +0000

Excelsus makes filters specifically for alarm systems – Excelsus Z-A431PJ31X DSL alarm filter. A regular DSL filter will not work and could/would interfere with your alarm system. Always talk to or have a technician from your alarm service when servicing your system

By: Bill

Bill — Tue, 06 Jul 2010 23:38:48 +0000

Wow! Awesome detective work!

Thanks for solving the issue and not throwing Monitronics under the bus in the process!

:-)

We’ll try to insure our technicians are better-educated about possible interference issues such as this in the future. Though, installers are actually all independent of our company as employees of authorized resellers, so some are a little variable in how well they train their staff.

I actually have Verizon internet service at my home as well, and have seen a few different things such as my alarm signals which can mess up service.

Again, thanks for patiently resolving this at your end and providing the description for others’ benefit!

By: Bob

Bob — Wed, 27 May 2009 18:09:13 +0000

A tech at my alarm monitoring company told me that the regular DSL filters are not what you want for your alarm system. You want an Alarm DSL filter. He recommended the Home Security Store (they’re about $19).

By: jacob

jacob — Mon, 23 Feb 2009 23:18:42 +0000

We have cable telephony and internet – could our alarm system be interfering with our phone system – we often hear clicks when talking on the phone, and lose connection for a second – could that be the alarm doing some kind of scheduled dialer test?

By: K. Ya

K. Ya — Mon, 24 Nov 2008 11:43:12 +0000

We don’t use our alarm and have never had any problems with the phone line or our adsl connection until the other day when we came home and the alarm was beeping, not the siren, just the keypad. I managed to make it stop but the service light is still on and the damn thing won’t stop ringing our phone line, making it unusable. Good thing we have VOIP too. I have tried many things as our internet connection was affected as well, but after fiddling around in the alarm box I have managed to get adsl back online. We still have no phone and the security firm who installed the alarm has not responded to my email. Probably because we are not paying them. Haha.

Any advice would be greatly appreciated. There is no filter on the alarm line, when I put one on the ringing stopped but there was still no dial tone and the modem drops out. The modem works fine when the phone line in the alarm box is disconnected.

Ta.
K

By: proudgeek

proudgeek — Mon, 15 Sep 2008 16:18:58 +0000

Wow, Dennis! Thanks for the explanation / comment.