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Standard User deleted
(deleted) Sun 18-Mar-07 13:49:12
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Re: Single cored wiring


[re: deleted] [link to this post] 		 
In reply to:

The cables are made of individual pairs of wires which are twistd along their length. Multiple pairs are then twisted together to form the cable.
Only twisted pair cable is used now, all the way between exchange and customer.

Is this true with old wiring though? Perhaps bundles that existed before ADSL?
Standard User Rockh
(eat-sleep-adslguide) Sun 18-Mar-07 13:58:13
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Re: Single cored wiring


[re: deleted] [link to this post] 		 
The comms cables I look after at work are now getting upto 100 years old in places and are twisted pair. The basis of telephony requires that there be some twist involved in the pairs to remove crosstalk etc.



Dave




Standard User pitnicker
(knowledge is power) Sun 18-Mar-07 16:43:08
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Re: Single cored wiring


[re: cahaddras] [link to this post] 		 
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Do you mean that A&B can sometimes be split across twisted pairs all the way back to the exchange?



No, I am thinking that this is something the OP might want to check in his own wiring. even with an extension, it may be bad news.

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Standard User Zarjaz
(experienced) Sun 18-Mar-07 20:06:55
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Re: Single cored wiring


[re: Rockh] [link to this post] 		 
Yep. Even the old lead and paper stuff is twisted pairs.

Zarjaz
Standard User titan
(committed) Sun 18-Mar-07 22:10:23
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Re: Single cored wiring


[re: Zarjaz] [link to this post] 		 
The 150 metres recently replaced from the road to my final drop is not twisted pair but two wires in parallel. I believe it is mild steel copper coated.
Standard User deleted
(deleted) Sun 18-Mar-07 22:16:57
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Re: Single cored wiring


[re: titan] [link to this post] 		 
It was manually twisted on install
Standard User deleted
(deleted) Mon 19-Mar-07 13:44:06
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Re: Single cored wiring


[re: deleted] [link to this post] 		 
So BT are twisting its customers?
Standard User junderwood
(fountain of knowledge) Tue 20-Mar-07 10:37:55
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Re: Single cored wiring


[re: deleted] [link to this post] 		 
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So BT are twisting its customers?

No, just employing people to screw up their kit.

John Underwood
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