Continuously expandable switching network

Details Continuously expandable switching network Continuously expandable switching network

1978-05-25

1979-11-06

Robinson, Thomas A.

179 15AQ, 179 15AT, H04M 300

Patent

active

041737130

ABSTRACT:
A telephone central office switching network and a basic switching element utilized therein is disclosed herein. The basic switch element has the capability of reflecting traffic entering any of the inlets thereto back to any other traffic inlet and the capability of connecting any of the inlets thereto to any of the outlets therefrom. The basic switch is implemented in the network incorporating the reflection technique, sometimes called a one-sided network in which the outlet from a switching stage is in a preferred embodiment connected to a higher order switching stage such that the outlets of the switching stages are progressively connected in a multistage configuration from the terminal stage into the folding point in increasing order, thereby enabling the outlets of the higher order stages to be used as reflection ports while simultaneously remaining available for connection to higher order switching stages without the necessity of recabling. A continuously expandable switching network is thus provided wherein incoming traffic penetrates the network only to the degree necessary to complete the required signal connection and is implementable either in space division configuration, time division configuration or any combination thereof, and utilizing either analog or digital encoding techniques.

REFERENCES:
patent: 3458658 (1969-07-01), Aro
patent: 3727006 (1973-04-01), Jacob
patent: 3760103 (1973-09-01), Condon
patent: 3906164 (1975-09-01), Philip et al.
patent: 4023141 (1977-05-01), Hwang

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