On Tue 25 Jun at 19:54 Rod Speed (3:711/934.2) wrote to Arthur Marsh:

AM> Total km of 0.4mm Copper with no loading or bridge taps 
AM> for 1e-7 BER

AM> Line card used for PCM channels was a universal card 
AM> from a "Compact RIM".

 RS> Have you tried graphing those ?  Some odd lumps in the 24000-33600 data.

No.

 RS> The hard limit at 9.9 with copper only etc is a bit hard to credit too.

People who live some distance from their local exchange (e.g. requiring
more than the 2355 metre cable length between my phone socket and exchange)
usually get heavier grade cable than 0.4 mm diameter.

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