On 1 Jul 2011 at 13:31, William Donzelli wrote:
  CDC was different, using fairly lightweight cables,
but still with odd
 connectors.  
Perhaps you're talking about 3000-series peripherals.  IIRC, the 6000-
series channels used bundles of coax that were terminated in taper
pins.  No connectors per se.  The 3000-series cables were twisted-
pair with real connectors.  6000-series hardware used 3000-series
unit-record peripherals via a 6681/84 channel converter.
I could be remembering wrongly.
--Chuck