Re: Length of Telephone Extension Cable
- From: Ian Bartholomew <news@xxxxxxxxxxx>
- Date: Sun, 16 Oct 2005 18:34:55 +0100
John of Aix wrote:
> In fact the distance from the exchange has nothing whatever to do with > it with a 56k modem, you can be at 200 miles if you like as long as > there is a wire between you and it. The 5/6km limit only applies to > broadband.
We were talking about the UK telephone system which has a max loop resistance of something like (and this is dredging back to a ELP course from 35 years ago) 3 to 4K.
It would be interesting to see the size of conductors that you would need to get inside the resistance and capacitance limits for a 200 mile line :-)
The _point_ I was trying to make to the OP, and obviously failing, is that the length of the internal cabling will usually be insignificant compared to the external cabling.
-- Ian
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