[Asterisk-Users] Re: Shielding of T1/E1 cables WAS RE: Pinouts for T1/E1 crossover

[Kevin P. Fleming]

Andrew Kohlsmith wrote:

> Insulation (especially such thin insulation) does not prevent crosstalk.  
> Distance, shielding and tighter twists do.

Ever looked at the underground cable in the street outside your
building? If it's more than 20 years old, it's probably paper-insulated
gel-filled cable, with an _extremely_ thin amount of insulation between
the conductors and _zero_ insulation between the pairs. T1s seem to work
just fine on it, unless it's very old or they try to put more than 6-8
spans in a single 100-pair bundle :-(