Browse Prior Art Database

Channel Tap Y Cable

IP.com Disclosure Number: IPCOM000107418D
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 3 page(s) / 89K

Publishing Venue

IBM

Related People

Carey, JJ: AUTHOR

Abstract

Disclosed is a unique, lightweight, tri-connector cable, that allows control units that meet the IBM System/370* original equipment manufacturer's interface specification, a convenient way to attach to the high speed data channel.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Channel Tap Y Cable

       Disclosed is a unique, lightweight, tri-connector cable,
that allows control units that meet the IBM System/370* original
equipment manufacturer's interface specification, a convenient way to
attach to the high speed data channel.

      The inflexible bundles of coax that comprise the System/370
channel BUS and TAG cables make control unit attachment difficult.
The large serpentine connectors used, and the fact that four cables
must be used to attach a control unit, compound the problem.  The
CHANNEL TAP Y cable is a lightweight, flexible transmission cable
that can interface electrically with the standard channel cable to
make control unit attachment easier.  It consists of 39 signal
conductors and 39 isolation conductors in a twisted pair
configuration.  The conductors are encased in a braided shield that
is, in turn, covered with a flexible outer insulating jacket.

      Although the channel transmission system is designed to operate
with a coax type media, by matching the electrical characteristics of
the coax closely, the dissymmetry to the signals caused by the
transition from the coax to the twisted pair is no greater than the
distortion caused by the serpentine connectors that are used to
interconnect the coax system.

      The 39 signals required for channel communication are
terminated in 78 pin "d" connectors.  Odd numbered pins are used as
the signal carriers and the even numbered pins used for isolating
ground conductors.  By using this configuration, all signal pins are
adjacent to isolati...