In reply to a post by RobertoS:

Following on from what Kr1s69 says, it is fine with the ADSL Nation XTE-2005 to connect the ring wire on T3 at each end. That's assuming you are using T2 and T5 for the extension, not the unfiltered extension A/B.

It incorporates a filter on T3.

If you are using the unfiltered A and B, then you need the extension filter anyway.

Interesting. Is the XTE-2005 the only one that incorporates a filter on T3? At different times I've used a faceplate filter from Clarity (probably made by Pressac) and one from Austin Taylor.

Not noticed any practical difference between them, but do either of these latter two incorporate a bell wire filter? Be interesting to know

Edited by Tacitus (Sun 12-Aug-12 11:19:13)

I don't know sorry. I only know the XTE-2005 and the current Openreach ADSL/VDSL faceplates do, and I'm almost certain I remember the OR-logo'd ordinary faceplates as well.

In reply to a post by Tacitus:

At different times I've used a faceplate filter from Clarity (probably made by Pressac) and one from Austin Taylor.

Not noticed any practical difference between them, but do either of these latter two incorporate a bell wire filter? Be interesting to know

Yes it would be interesting to know - I use a Pressac but don't connect the bell wire. I don't actually need the bell wire connected for my phone extension but if I did it might possibly cause problems?

In reply to a post by RobertoS:

I don't know sorry. I only know the XTE-2005 and the current Openreach ADSL/VDSL faceplates do, and I'm almost certain I remember the OR-logo'd ordinary faceplates as well.

I'm pretty sure the OR logo'd NTE5s incorporate a bell wire filter. Getting OR to fit one is another matter altogether, although they do appear on eBay from time to time - entirely legally I'm sure

It would certainly be useful to know which of the replacements incorporate a bell wire filter. The XTE-2005 seems to be the leader in this respect, although I'm not a big fan of active filters.

In reply to a post by RobertoS:

I don't know sorry. I only know the XTE-2005 and the current Openreach ADSL/VDSL faceplates do, and I'm almost certain I remember the OR-logo'd ordinary faceplates as well.

Just to get matters right, all filter faceplates from BT, ADSL Nation and anyother supplier, generate their own ring wire connection after the filter. They do not use the connection from the NTE-5 for other than the line pair.

In reply to a post by RobertoS:

Is the ring wire connected at the extension?

Nothing wrong with the cheapo Krone tools.

Suppose it has to be as there has nearly always been a pulse dial phone connected there even before I had broadband.
Yeh the Krone tool seemed to work well enough.

In reply to a post by RobertoS:

Neither does a conventional filter split the two signals. It could only do that by containing two filters, one to remove broadband, feeding the phone socket, followed by another removing the phone stuff. So more than doubling the complexity of the bit of kit.

ADSL/VDSL2 sockets present everything that is on the line to whatever is plugged into them. Filtered phone sockets only get analogue audio frequencies. A modem or modem/router on a ADSL/VDSL2 filtered socket gets an unfiltered signal, including the phone frequencies which it ignores.

http://www.clarity.it/telecoms/adsl_bandwidth.htm - "...sound freqencies on the line which sneak up into the chunk where ADSL is working, your ADSL modem can get pretty miffed and slow down, stall, or even lose the connection with your ISP." ???

It's badly put, that's all. (He does say it's a simplified guide).

The filter works in both directions, removing all but phone frequencies.

So for downstream the xDSL stuff doesn't get to your phone circuit, and for upstream only phone frequencies get back from the phone circuit to the exchange connection - i.e.where the xDSL is.

The xDSL circuit is unfiltered.

In reply to a post by 4M2:

http://www.clarity.it/telecoms/adsl_bandwidth.htm - "...sound freqencies on the line which sneak up into the chunk where ADSL is working, your ADSL modem can get pretty miffed and slow down, stall, or even lose the connection with your ISP." ???

Odd. If the filter removes voice frequencies from the line entirely, how would they ever reach the exchange?

In reply to a post by Oliver341:

Odd. If the filter removes voice frequencies from the line entirely...

It doesn't. It only removes any frequencies coming from the "voice" side which are high enough to potentially interfere with xDSL operation.