In message , Andy Wade
writes
bof wrote:

Is there a spec that says CW1308 must be twisted?

Yes, CW 1308 _is_ the BT specification.

Go to the RS web site (http://rswww.com) and do a simple search for
"cw1308", which will bring up a list of all the '1308 cables they sell.
Click on the PDF icon against any product and you can download a copy
of the actual BT spec. - CW 1308 Issue 8. Note the requirements for
lay length (section 4.2) and reference to twists in section 5.

Thanks, looks like I've got a non conforming spool then, if there is any
twisting it's in many metres lay length no way it's 100mm or less. It
works fine for phone, but I found the problem when I used it to wire
some short (5m) runs of 100baseT, which I was expecting to work.

To get back to the original post I now use Cat5e for phone and data
wiring.

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