John Coppens schrieb:
> Hello guys...
> =

> Can anyone give me the correct name to look for? I'm trying to find the
> specs for those last-100m-or-so outdoor phone cables, which are flat,
> single pair, but with a center support wire.
> =

> They have a very tough (black) plastic (very difficult to make knots). =

> =

> I'm particularly interested in velocity factor (my ADSL is failing, and
> the phone techs can't seem to locate the fault - or they don't want to).
> =

> I seem to miss the correct terms to guide google. It doesn't help that
> phone cables are used for everything nowadays.
> =

> John

The velocity factor depends on the used material - if it is =

PVC--insulated material, the speed is around 176 m/=B5s, if it is PE the =

speed is around 204 m/=B5s. This speed depends mostly on the capacity of =

the wires against each other and ground and the Epsilon-r of the used =

isolating material.

In Europe the Telcos use mostly filled cables (isoparaffine) with PE =

foam coated copper, this speed is around 196 m/=B5s.

Regards

Enrico

-- =

http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist