Issues with ADSL line filters

[stevo1210]

I've been setting up a new ADSL 2+ connection for the grandparents. Everything works great, the net is nice and fast... no issues there. However I'm having an issue with the ADSL filters I bought for them for the telephone.
From what I've discovered, it only works with the wired telephone that feeds power off the phone socket. If I plug that same filter into the cordless Panasonic phone, nothing comes through on the phone... it's all silent.
But if it's plugged into a wall phone, everything is fine and there are absolutely no issues at all.
These filters I bought are Telstra brand (Big Aussie phone line company) and they have one line to the wall socket which splits into "local phone" and "ADSL modem" on the other side of the filter.

What's going on here? Did I buy the wrong filter? or does the cordless phone just hate me? I use cheapo generic chinese made filters on my panansonic cordless phones here without an issue for years... though they are just simple units connected in series with one in and one out.

[seanc]

Re: Issues with ADSL line filters

The cordless phone hates you.

I use those ADSL filters all the time with no issues. Try some different ones.
Is the telephone cable being used by the cordless phones the correct one?

[stevo1210]

Re: Issues with ADSL line filters

I think telephone cable has to be the right one other wise it won't work with or without the filter regardless. Funny thing is that the filter in question works fine on my home Panasonic cordless phone which is a similar unit to the other one at my grandparents house (though mine is a tad older).

[japlytic]

Re: Issues with ADSL line filters

Telstra states that if you have 4 or more phones on the shared ADSL line, you need a central splitter with professional installation.

[inuyasha.rules]

Re: Issues with ADSL line filters

The older dsl modems had line and phone on the back and id run line from the box to the line port then from the phone port to the phones in a star configuration. One possibility is the cordless needs a higher ring power than those elcheapo filters can handle. So id try buying a good brand like 2wire or actiontech before I started rewireing. Oh it also could be that the plug and jack combo are slightly out of spec causing a bad conection. Best of luck.

[inuyasha.rules]

Re: Issues with ADSL line filters

Telstra states that if you have 4 or more phones on the shared ADSL line, you need a central splitter with professional installation.

If the "professionals" are anything like where I live a blind novo can do better. Wish I could remember the link for advanced installs from when I worked for ATT over here in the states

[Lobo]

Re: Issues with ADSL line filters

Don't use filters if your modem and phones are plugged into different sockets. You only need a filter if your modem and phone are sharing the same socket.
Please disregard if you already tried this.:P

[seanc]

Re: Issues with ADSL line filters

Don't use filters if your modem and phones are plugged into different sockets. You only need a filter if your modem and phone are sharing the same socket.
Please disregard if you already tried this.:P

This is not true for the UK. You must have filters on all sockets where there is a device plugged in.

[Lobo]

Re: Issues with ADSL line filters

This is not true for the UK. You must have filters on all sockets where there is a device plugged in.

I had no idea. I had the same problem though, until I took the filters out of the equation and moved my modem across the room. oh well

[seanc]

Re: Issues with ADSL line filters

In almost all UK installations, you have a 'master' socket where the line is run from the telephone exchange into your house.
Any additional sockets are then run as extensions from the main socket, or each other.
Having a phone call without a filter plugged in will make the ADSL connection drop.

[smason]

Re: Issues with ADSL line filters

Use a POTS splitter. Trouble free.

[japlytic]

Re: Issues with ADSL line filters

You only need to use filters on lines which have ADSL enabled. But it should not hurt to have them on all lines, even those without ADSL enabled.

[shadow]

Re: Issues with ADSL line filters

Can you show a picture of the filter? Or at least stipulate exactly which model you got from Telstra?

There are a few which are available in Aus which are high quality. The easiest one to get is the ADSL2+ rated filter from Bunnings (Jackson brand). They are pretty good.

I have a Panasonic cordless phone too and everything was fine with those filters from Bunnings. However I have installed a central splitter now since putting in an extra phone on the line.

Apparently Panasonic cordless phones are a real nuisance with particular filters. So it does not surprise me that you have troubles only with the Panasonic cordless phone.