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Wiring wierdness |
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#1 |
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Inactive Member
Join Date: Mar 2004
Posts: 4,238
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Wiring wierdness
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? |
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#2 |
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Banned User
Join Date: Oct 2003
Location: Back where I belong.
Posts: 12,574
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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. |
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#3 |
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Forum Member
Join Date: Jan 2003
Location: Bedfordshire
Posts: 1,105
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Quote:
Originally Posted by qpw3141
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? If you don't understand I suggest you leave the technical stuff, including the BT wiring, to those that do!
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#4 |
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Inactive Member
Join Date: Mar 2004
Posts: 4,238
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Quote:
Originally Posted by mrfreeview
Obviously NOT an engineer!
![]() 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. Quote:
If you don't understand I suggest you leave the technical stuff, including the BT wiring, to those that do! 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. |
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#5 |
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Forum Member
Join Date: Jan 2003
Location: Bedfordshire
Posts: 1,105
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Quote:
Originally Posted by qpw3141
If I was a telecoms engineer, I wouldn't have been asking this question.
Quote:
Originally Posted by qpw3141
On the other hand, I could well be a mechanical engineer, a hydraulic engineer, a civil engeer - the list goes on. 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. Quote:
Originally Posted by qpw3141
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. 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. Quote:
Originally Posted by qpw3141
I was just checking the inside of the box to ensure the cable hadn't been dmaged/loosened/eaten by voles, etc. 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? Quote:
Originally Posted by qpw3141
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.
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! |
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#6 |
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Inactive Member
Join Date: Mar 2004
Posts: 4,238
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Quote:
Originally Posted by mrfreeview
So far you have tried to belittle me through two theads
Quote:
To date you have announced that you were a student of electronics, then perhaps not.
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. Quote:
Then you stated you undertook stage lighting only to later change your mind
I did not change my mind. I did stage lighting. End of story.Quote:
I was always of the understanding that the object of a forum like DS was to help one another.
And yet you seem to be using it to be a pompous prig and score points?Quote:
Again another inconsistency! I didn't understand something about some wiring so I asked a question which was swiftly and consisely answered by another poster.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. You seem to have a major problem with that. Why? Quote:
And if you don't understand, perhaps because your out of your depth, say nothing.
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.Quote:
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.
FFS, I asked a question. What the hell is your problem?Quote:
Out of curiosity (because the installation seemed very old and not all that well done, checked the wiring in the BT master box). 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.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? Quote:
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.
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.Quote:
The instructions are provided so that most people can manage this type of work.
Well done. You've got it.Quote:
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!
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. |
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#7 |
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Banned User
Join Date: Dec 2005
Location: In the depths of DEPRAVITY
Posts: 1,830
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Quote:
Originally Posted by qpw3141
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? |
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#8 |
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Forum Member
Join Date: Jan 2003
Location: Bedfordshire
Posts: 1,105
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Quote:
Originally Posted by qpw3141
If you:
Take comprehension lessons I suggest you seek quality psychiatric help at the earliet opportunity. You are a pretty poor engineer. 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. |
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#9 |
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Co-founder
Join Date: Mar 2000
Posts: 2,621
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And we'll end this here.
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