Browse Prior Art Database

Dedicated Passive Backbone for Power Line Communications

IP.com Disclosure Number: IPCOM000118834D
Original Publication Date: 1997-Jul-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 4 page(s) / 81K

Publishing Venue

IBM

Related People

Cato, RT: AUTHOR [+3]

Abstract

Disclosed is an apparatus to provide a high-frequency, low-voltage signal path between the secondaries of a building's power distribution transformers. This path consists of a passive low-voltage backbone and appropriate coupling devices.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 61% of the total text.

Dedicated Passive Backbone for Power Line Communications

      Disclosed is an apparatus to provide a high-frequency,
low-voltage signal path between the secondaries of a building's power
distribution transformers.  This path consists of a passive
low-voltage backbone and appropriate coupling devices.

      It is desirable to use the power lines as a communications
medium, as they are a resource already available.  Unfortunately,
large stores and offices often have more than one power transformer
that steps the Alternating Current (AC) power down to the commonly
used 120 Volts Alternating Current (VAC).  These transformers do not
couple communications signals from secondary to primary.  Thus, it is
necessary to couple the communication signals to each transformer
secondary.

      The backbone provides true isolation between stores in a mall
yet links all the transformers in a store into a single communication
network.  This plus provides true ownership of the communication
medium and resultant data security.  The dedicated backbone also
eliminates noise sources that are not owned by the store from
affecting its communications.

      The dedicated backbone is attached to the low voltage side
(secondaries) of the distribution transformers with a passive
attachment device.  The attachment device must also protect the
Backbone from hazardous voltages if a low voltage, non-fiber backbone
is used.  The attachment device may apply signals to the secondar...