I had to add an extension for someone, and just out of curiosity (because the installation seemed very old and not all that well done, checked the wiring in the BT master box). To my surprise, there were only two wires connected.

I always believed that you needed at least three. Phones and modems work quite happily.

What is the minimum mumber of wires you need connected to the exchange to make a normal telephone work?

There are only two wires that come into your home. A & B. These are connected to 2 and 5 on the master socket.

The master socket contains a ring circuit (capacitor and resistor) which links to pin 3.

When you connect slave extensions you then connect 2, 3 and 5 from master socket to slave, to further slaves.

You don't have to connect 3, but you may find some phones will not ring out, the phones that do ring out have this 'ring circuit' built-in, it is really only phones that are designed for UK use only that don't have the ring circuit built in.

Obviously NOT an engineer!

If you don't understand I suggest you leave the technical stuff, including the BT wiring, to those that do!

God, but you're sharp!

Not too hot on elementary logic, but pompously acerbic.

If I was a telecoms engineer, I wouldn't have been asking this question.

On the other hand, I could well be a mechanical engineer, a hydraulic engineer, a civil engeer - the list goes on.


And if you can't be bothered to read a post, I suggest you shut up and allow people who are actually desirious of being helpful to answer it.

I was just checking the inside of the box to ensure the cable hadn't been dmaged/loosened/eaten by voles, etc.

The wiring of the extension is perfectly simple provided you follow the instructions, writen by engineers who are trying to be helpful rather than poke fun at non-engineers of their particular discipline.

Well I would like to think not!

So far you have tried to belittle me through two theads showing, in these, a number of inconsistencies in your postings.

To date you have announced that you were a student of electronics, then perhaps not.

Then you stated you undertook stage lighting only to later change your mind

You could be a road sweeper or work down the Jam Factory - Quite frankly I don't give a toss.

I was always of the understanding that the object of a forum like DS was to help one another.


Again another inconsistency!

Can I suggest that YOU should read and then think very carefully about what you are going to say in a thread and then take care in how you compose a response.

And if you don't understand, perhaps because your out of your depth, say nothing.

Put bluntly, if you were verbally mouthing off, your lips under the sewing machine 'blanket stitch' would seem to be, on a number of occassions, most appropriate.

Another inconsistency! see post #1

Out of curiosity (because the installation seemed very old and not all that well done, checked the wiring in the BT master box).

And as you have earlier stated you are not a telephone engineer so how can you possibly pass judgement on the standard of an installtion?


Yes you don't actually have to or need to understand what you are doing with the instructions that are produced. You have clearly demonstrated this by installing an extension without knowing how many wires are need to provide a connection to an exchange.

The instructions are provided so that most people can manage this type of work.

The problem usually comes later when the installation goes defective. This is usually because of poor installation standards and then a lack of logical faulting technique. When you don't know what your doing even 3 wires never mind 4,5 or 6 can seem complicated!

No, you completely misunderstood a humourous post that no one else had trouble with, and in your desire to be pompous and unpleasant stalked me across another forum and made stupid comments about a simple question I asked.


If you:

1) Have the sense of humour bypass reversed
2) Take comprehension lessons

You will see I never announced any such thing. I merely stated that Electronics PhD studenets had to do something in their spare time. No one else took it as a serious assertion that I'd been an electronics student.


I did not change my mind. I did stage lighting. End of story.


And yet you seem to be using it to be a pompous prig and score points?


I didn't understand something about some wiring so I asked a question which was swiftly and consisely answered by another poster.

You seem to have a major problem with that. Why?


So, no one can gain enlightenment here since if we doin't understand, we cannot speak. I suggest you seek quality psychiatric help at the earliet opportunity.


FFS, I asked a question. What the hell is your problem?



If you can't understand the difference between checking to make sure nothing has been pulled loose/put under strain/eaten, and certifying the correct connections have been made, you are a pretty poor engineer.


Again, I don't know what your problem is here. I followed the instructions and correctly installed the extension. They are designed to be installed by people who know nothing about telecom circuitry.


Well done. You've got it.


Again, you seem confused about the difference between knowing the function of each wire, and the ability to do point to point wiring.

If the installation 'goes defective', then the only possible remedial action that can be taken with this type of extension is to ensure the moulded plug is still plugged in at one end, and that the three screwed connections are still intact at the other. Other than that, you've got a break in the cable of inside the cable/plug interface.

In general a bt master socket has only two cables connected to pins 2 and 5. Any slaves used to have a third core connected to three as an anti tingle as some of the old phones would omit a small ring when the handset was picked up to make a call. If you install a master socket as a slave it is best to cut out the capacitor. hope this helps as a bit of an explanation. If you have a krone type phone socket and you do not have a special tool to punch the cables down you can very carefully use a stanley knife.

I respond as:

I find your comments not only insulting but also offensive.

You question my technical abilities and now my mental state.

You have demonstrated, by your posts, how low a person can stoop.

Your comments are without foundation.

You are, I would suggest, a very insecure person.

I am so pleased I don’t have you or anyone like you living next door to me and I now appreciate how lucky I am that I don’t have to work along people such as you.

Just looking at your profile on this forum, really says everything about you:

Interests:
Having delusions of grandeur

Occupation:
Lord High Master of All the Universe

Some who read your profile may well come to a view that you clearly are a sad little individual, who in all probability lives in their own little dream world.

Get a life and then try and add something positive to society.

As I have better things to do with my life, any further posts you make will either be ignored, which is perhaps what I should have done in the first place: IGNORE YOU or will be responded to with a repeat of this post.

And we'll end this here.