Back to results
US 4,400,627 AGranted
Telephone switching network
AssigneeBell Telephone Laboratories, Incorporated
InventorMeyer J. Zola
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeBell Telephone Laboratories, Incorporated
InventorMeyer J. Zola
Estimating the term…
An arrangement and method for interconnecting the stages of a space division switching network which provides simple and continuous growth from a small number of lines to the system's maximum number of lines. The switching network comprises up to M input stage switches, center stage switches and up to M output stage switches. Incoming lines are connected to the input terminals of the input stage switches such that no input stage switch is connected to a number of incoming lines which exceeds the number of incoming lines connected to any other input stage switch by more than one. The number of center stage switches is established from a predetermined interconnection plan and at any given time, the number of center stage switches is a function of the number of lines connected to the input stage switch having the largest number of lines connected thereto. As each line is connected to an input stage switch, the output terminals of that switch are distributed over the available center stage switches. The output stage switches are connected to the center stage switches and to outgoing lines in analogous manner.
A method of growth for a switching network, which switching network comprises an input stage comprising up to M input stage switches, each comprising input terminals and output terminals, a first center stage switch having up to M input and up to M output terminals, and up to M output stage switches, each comprising input terminals and output terminals, when up to M incoming and M outgoing lines are to be connected thereto, said method comprising:
A method of interconnection for a switching network, which switching network comprises up to M input stage switches each comprising input and output terminals and up to M output stage switches each comprising input and output terminals when an equal number of incoming and outgoing lines are present for connection to said network, said method comprising:
A method of growth for a switching network which switching network comprises an input stage comprising up to M input stage space division switches, each comprising input terminals and output terminals, a first center stage space division switch having up to M input and up to M output terminals, and up to M output stage space division switches, each comprising input terminals and output terminals, when up to M incoming and M outgoing lines are to be connected thereto, said method comprising:
Dependencies are inferred from the claim text.