bosch alarm and adsl filters

[chmaiden]

Hi

I am a newbie - no idea when it come sto a lot of electronics!! I have just moved into a new house that has a Bosch Solution alarm system setup inc dial up if alarm is tripped. I have also just have adsl connected for braodband. I am assuming that I have to put an adsl filter on the alarm box as I am getting a LOT of interference on the phone when the router is switched on. I have a filter on all the other phones that I am using - so am assuming that its the alarm. How do I go about doing that? I am assuming that I have to disable the alarm or it will go off when I take the panel off the alarm box?

Any help would be much much appreciated!!!

c

[keef82]

Hi There,

At this point i would highly recommend that you have a licensed cabler attend to install a central filter property.

Is your alarm system monitored by a security company, or does the panel ring your mobile ?

You also need to determine if the system has a "mode 3" set up.
To do this, you will need an arm/disarm code for the system.

1) Open the alarm panel
2) sirens may go off, use your code to silence the system
3) disconect the RJ phone lead from the PCB of the panel
4) check all phones in the house, they "should" be dead, iof they are you need a licensed cabler from this point, if you install a filter you will also filter out the ADSL to the premises..

5) if all the phones are alive, the system is not in "mode3" and you can simply install a RJ style filter inline with the panel, problem solved.

Remember to plug the RJ lead back into the dialer.

Hope this helps.

[intelliGEORGE]

Simple answer, central line filter. You will need a licenced cabler or sparky to install it but it's 100x better than those stupid inline filters I find everywhere.

[chmaiden]

cheers guys...so how much is this going to cost me roughly ?

[intelliGEORGE]

cheers guys...so how much is this going to cost me roughly ?

$40 for the central line splitter/filter + labour

[keef82]

Its all fun and games if the premise is in daisy chain ehhe not star!

[keef82]

cheers guys...so how much is this going to cost me roughly ?

Did u do as i posted, the simple test?
I would proceed with that, post me the answer then we can discuss the appropriate filter

[chmaiden]

will do mate - will have to wait until when the kids arent in bed though!!!

[chmaiden]

Hi guys

ok - took the front panel off, disconnected the phone socket inside...tried the phone...no problems but still a lot of noise / interference. fitted the little adsl filter - helped with the noise on the phone, but broadband stopped.

hmmmm....confused now!!!

[keef82]

OK so you have done one thing wrong.
Dont disconect the lead from the socket in the panel, disconect the lead from the circuit board. (check all phones)

It sounds like it is in mode 3 connection so by installing a filter in the panel you will lose your adsl connection.

1) is the alarm back to base monitored?
2) Install a central line filter, this will filter all lines, but split the adsl modem from the mode 3, meaning that is an unfiltered point.
3) if alarm is not monitored, disconnect that socket and have a tech de commission the dialer.

[chmaiden]

Sorry - i disconnected the lead from the circuit board (my bad - dont really know the terminology!) - put the filter on but no adsl. so sounds like you got it right with your prognosis!

1) dont think so - i've set it off a few times now and noone has contacted us!!! - its a Bosch Solution 862

2) this sounds about right - so about 40 bux for the filter - how long do they take to fit?

And...does anyone know anyone reliable in the Melbourne Western Suburbs? I have had another thought tho - could the interference on the wireless phones be due to the router I am using ? - it was one that I brought over from the uk with me - NEtgear???

[keef82]

OK, So from here we have determined the following
1) you dont have it monitored back to base
2) the phone lines are in "mode 3"

So you need to either have a central filter installed, and the dialer disconnected. or you can change the wiring at the socket in the panel to make it a non mode 3, then use inline filters everywhere, except the adsl modem.

PM me if you would like the instructions on how to reverse the mode 3.

[bluebronco28]

Not Just a Noisy Phone Line that Telstra will have to figure out..?

[intelliGEORGE]

If you don't want to use central line splitter/filter then you need to make sure your end result looks like this. This way you do not have to remove the mode 3 connection.

[chmaiden]

man...you guys are good...this is getting a bit complicated!

that diagram is good...and I think that it looks like that but of course I cannot tell re the rest of the phone wiring in the house...I will have another look when i get some time tomorrow and report back...perhaps i'll take some photos and post up?

[chmaiden]

ps the phones are fine when the router is switched off...at the moment whenever there is a call on the landline we have to switch the router off!!!

[mtv]

Agreed that the central filter/splitter is the way to go.

I've replaced several 'inline' types that had been configured as per the diagram. The inline type just don't have the isolation and filtering compared to a central filter.

Many inline types also don't pass the line in both directions. Eg: though the filter to the alarm panel and then back through the filter to the handsets and the ones I've seen that do, still have a lot of noise on the line.

I've also seen wireless modems/routers passing interference via the inline filters.

[keef82]

If your really confused, get a licensed cabler in to fit it for you dude.
IN the interim, disconect the alarm from the socket, your phones should return.
The alarm may start beeping.