Thanks Phil, will examine them in detail later.
Mike.

I'm sure it's easier and cheaper to recreate the bell wire rather than filter it in practice. The real issue is how do you tell? The only practical approach is to check that each phone rings after disconnecting any ring wires. Ideally one phone should also ring without any mains power for emergencies.

In reply to:

---

The only practical approach is to check that each phone rings after disconnecting any ring wires.

---

Agreed, especially as many don't need the ring wire in the first place.

Hi Phil, had a look at that page at ADSNATION.

Have ordered a ADSL Nation XF-1e filter, may cure the ADSL noise that I sometimes get creeping through to the phones.

Will let you know how I get on.

Using the freebie cheap Chinese one Speedtouch give you at the moment, XF-1e must be better than that.

Mike.

"Ideally one phone should also ring without any mains power for emergencies."

Assuming one is a 999 operator taking calls at home.

be interesting to see if you can measure the difference other than with your ADSL kit.

In reply to:

---

I'm sure it's easier and cheaper to recreate the bell wire rather than filter it in practice

---

Very shortly, all new NTE's will come with a bell wire 'choke' fitted as standard, which will stop the ADSL signal getting into the bell wire in the first place. Still not quite as good as the face plate filter, but not at all bad.

In reply to:

---

Very shortly, all new NTE's will come with a bell wire 'choke' fitted as standard

---

Be interesting to see if they arrive on the "grey" market too. Not sure why they didn't bite the bullet and go for 2-wire circuits on new installs.

Does that apply to the external NTE's also?

I thought it was:

a) a requirement - BT or your telephone operator may need to contact you.

b) a sensible precaution. You might want to be able to receive calls even if there was a power cut or your mains had blown. (In those circumstances I would certainly want to be able to make calls and that tends to imply that I would want people to be able to ring me).

For both of these, therefore, it would be essential to have one phone which did not need a mains supply, could make and receive calls and the bell would ring for an incoming call.

THere may be other solutions, e.g. a mobile phone which might work in many circumstances (given that it is charged when you need it in an emergency and the signal is good enough).

A significant point is that, in an emergency, it may not only be outgoing calls that are essential.