Browse Prior Art Database

Switching Network with Reduced Crosstalk

IP.com Disclosure Number: IPCOM000092355D
Original Publication Date: 1967-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Besseyre, J: AUTHOR [+3]

Abstract

This is an arrangement of connections within a one-wire switching network for reducing cross talk due to magnetic coupling, especially applicable to large PBX's.

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Switching Network with Reduced Crosstalk

This is an arrangement of connections within a one-wire switching network for reducing cross talk due to magnetic coupling, especially applicable to large PBX's.

Instead of having distinct boards for each subnetwork and junctors, all subnetworks are concentrated on a same board or on boards in the same vicinity. The wires extending between the junctors and the network are arranged by couples in a same cable. Each couple is constituted by the two wires connected to the same junctor.

The drawing shows such an arrangement. When subscriber A is connected to subscriber B through junctor J, the magnetic fields generated by the two signals flowing through wires a and b cancel each other. Thus, no cross talk occurs with another speech circuit, e.g., the one connecting subscribers A' and B' through junctor J' and wires a' and b'.

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