Teletypewriter loop switching matrix
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsRobert R. Hartley, Joseph A. Konrad
Life of this patent
Estimating the term…
Abstract
A system for interconnecting and switching teletypewriter or digital data gnals when transmitted over any of the four universally accepted standard signal loops. The system incorporates a novel triple loop arrangement; an "IN" loop connected to a signal source, an "INTERNAL" loop to provide switching and an "OUT" loop connected to the signal destination. Each "IN" loop or "OUT" loop together with half of its associated "INTERNAL" loop is implemented in a single printed circuit card. The system can incorporate any number of "IN" and "OUT" loops and the associated "INTERNAL" loops.
Claims9
A system for interconnecting and switching teletypewriter signals which comprises:
- a first plurality of "IN" loops with each member thereof receiving the teletypewriter signals from a corresponding member of a plurality of sources of the teletypewriter signals;
- a second plurality of "INTERNAL" loops with each member thereof having a first half interfaced with a corresponding member of said first plurality of "IN" loops;
- and
- a third plurality of "OUT" loops with each member thereof connected to a plurality of receivers of the teletypewriter signals and each member thereof being interfaced with a second half of a corresponding member of said second plurality of "INTERNAL" loops.
A system for interconnecting and switching teletypewriter signals comprising:
- a first and second plurality of identical printed circuit boards having identical components connected identically, with each circuit board comprising first and second power supplies separated by an optical isolator;
- and
- switching means connected between said first and second plurality of printed circuit boards for selectively connecting first printed circuit boards to second printed circuit boards.
Dependencies are inferred from the claim text.