Pertec Interface Cable Length

[Dennis Boone]

 > It doesn't work when I use a pair of 5 foot long flat ribbon cables.
 > Are they too long?  Do I need twisted pair type of cable?  Is it
 > possibly a termination problem?

These cables typically were twisted pair, at least inside cabinets.
(They might transition to round cables at bulkheads before routing to
other cabinets.)  I've seen them in lengths of like 20-30 feet.

De