Telephone switching system

Claim 2

A telephone switching system which comprises: a. a matrix strip having a plurality of switch elements, b. matrix strip control means including a counter having storage for a plurality of counts each corresponding to a different one of said switch elements, c. means operated by said counter for individually operating said switch elements which correspond to the counts stored in said counter, and d. link selecting means for advancing said counter to selected counts.

Claim 3

The invention as set forth in claim 1 including: a. a plurality of said matrix strips each providing a separate link, b. a plurality of said counters included in said control means, each of said counters being associated with a different one of said matrix strips, c. a plurality of said counter operating means each for operating the switch elements of different ones of said matrix strips in accordance with the count stored in the counter associated therewith; and wherein d. said link selection means includes means for advancing different ones of said counters whereby to select the link provided by the matrix strip associated therewith.

Claim 4

The invention as set forth in claim 2 further comprising a plurality of inlets to said system connected in multiple to each of said matrix strips, each inlet corresponding to elements in different ones of said matrix strips which correspond to a like count, and means included in said link selection means for selectively connecting different inlets to different links operative to advance the counters associated to switch elements which correspond to said inlets.

Claim 5

The invention as set forth in claim 3 wherein said means included in said link scanning means includes another counter associated with said inlets, means for advancing said other counter to counts corresponding to inlets to be connected to said links, and means for selectively transferring said counts stored in said other counter to said counter associated with said matrices.

Claim 6

An electronic switching system which comprises: a.. a plurality of switching matrix strips each including a plurality of switch elements for connecting any one of a multiplicity of different lines to any one of a plurality of links, and b. pluralities of link memories each including a binary coUnter connected to a different one of said matrix strips for operating selected elements thereof.

Claim 7

An electronic switching system which comprises: a.. a plurality of switching matrix strips each including a plurality of switch elements for connecting any one of a multiplicity of different lines to any one of a plurality of links, and b. pluralities of link memories each including a binary coUnter connected to a different one of said matrix strips for operating selected elements thereof.

Claim 8

The invention as set forth in claim 5 wherein said matrix strips are arranged in: a. a first matrix stage including a plurality of groups of said matrix strips, each connected in multiple to a different group of inlet lines, b. a second matrix stage including a plurality of groups of matrix strips different in number than said first group, each group of said second group of matrix strips being connected in multiple to a different group of outlet lines, c. a plurality of links connected between different matrix strips in said first group and different matrix strips in said second groups, and wherein d. means are provided for advancing different counters in said link memories for connecting said inlet and outlet lines via different ones of said links.

Claim 9

A switching system for connecting input lines to links which comprises: a. a plurality of cross-point link matrix strips each having an outlet for connection to a different one of said links and a plurality of input each for connection to a different one of said lines, b. a plurality of counters which provide memory for each of said links, c. link selection means for controlling said counters and for selecting different ones of said link matrix strips, and d. cross-point selection logic circuit for transferring the count stored in each of said counter to the matrix strip associated therewith for operating cross-points therein corresponding to different ones of said line whereby to connect said lines to different ones of said links.

Claim 10

A switching system for connecting input lines to links which comprises: a. a plurality of cross-point link matrix strips each having an outlet for connection to a different one of said links and a plurality of input each for connection to a different one of said lines, b. a plurality of counters which provide memory for each of said links, c. link selection means for controlling said counters and for selecting different ones of said link matrix strips, and d. cross-point selection logic circuit for transferring the count stored in each of said counter to the matrix strip associated therewith for operating cross-points therein corresponding to different ones of said line whereby to connect said lines to different ones of said links.

Claim 11

The invention as set forth in claim 7 including a scanning cross-point matrix strip connected between said lines and said link matrices, a counter associated with said scanning matrix strip, means including said counter and said scanning matrix strip for scanning said line to detect any one thereof which is marked for connection to said links, means for controlling said scanning matrix strip counter so that it stores a count corresponding to said line which is to be connected to said links, and means included in said selection logic for said link matrix strips for transferring the count in said scanning matrix strip counter to selected ones of said link counters.

Claim 12

The invention as set forth in claim 7 wherein all said counters are binary counters, and including a plurality of code conversion means connected between said counters and their corresponding link matrix strips for translating the binary coded count in said counter into an output for operating the cross-point is said link matrix strips corresponding to said binary count.

Claim 13

The invention as set forth in claim 9 wherein said cross-point matrix strips each includes 10 cross-point switch elements and wherein said code conversion means is a binary code-to-decimal code converter.

Claim 14

The invention as set forth in claim 7 wherein each of said selection logic includes a source of clock signals, a plurality of control gates input coupled to said source out to different ones of said counters for inhibiting the application of clock pulses to said counters, and means transferring the counts stored therein to said matrix strips.

Claim 15

The invention as set forth in claim 11 including a means for selectively enabling different ones of said counter control gates when the link associated therewith is free.

Claim 16

The invention as set forth in claim 8 wherein said scanning matrix strip includes a plurality of cross-point switches each for providing a connection from a different one of said lines to a seize detector input, a counter control gate, a source of clock pulses connected to said counter control gate for applying said clock pulses through said gate to said scanning matrix strip counter, and means for inhibiting said counter control gate in response to a seize detection signal from said scanning matrix associated therewith.

Claim 17

The invention as set forth in claim 13 including a plurality of scan gates for transferring the output of said scanning matrix strip counter to said scanning matrix strip, and means for inhibiting said scan gates when said counter stores a count corresponding to a busy line.

Claim 18

The invention as set forth in claim 14 including a code converter connected between said scanning matrix strip counter and the individual point switch elements of said scanning matrix strip for translating binary codes in said scanning matrix strip counter into codes for sequentially operating different ones of the cross-point switch elements in said scanning matrix strip.

Claim 19

The invention as set forth in claim 7 including a pair of scanning matrix strips connected in tandem between said lines and said link matrix strips, a separate scanning matrix strip counter associated with each of said scanning matrix strips, and means for applying clock pulses to said scanning matrix strip counters simultaneously so that said counters produce different counts that are displaced with respect to each other, means for transferring the counts in said counters to their respective scanning matrix strips for successively operating different cross-point switch elements therein, and means responsive to the transmission of a signal through an operated one of said cross-point switch elements indicative of a line marked as desiring service for stopping the application of said pulses one of said scanning counters associated with one of said scanning matrix strips which detects said marked line.