Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A telephone switching system which includes scanning means for interrogating a plurality of links interconnecting a plurality of switching stages of the system and for deriving busy and idle status signals of said plurality of links to be applied to a register means of the system, wherein the improvement comprises a plurality of diode-gating means responsive to said interrogating signals for applying said busy and idle status signals of said links to said register means, each of said diodegating means being coupled to said scanning means and said register means, and to a corresponding one of said plurality of links, each of said diode-gating means including: a DC potential source; a junction; a first resistive means coupling said DC potential source to said junction; a second resistive element coupling said junction to said corresponding link; a capacitive element coupling said scanning means to said junction; and a first diode means being coupled to said junction and being poled to change from a nonconductive to a conductive statE in response to the change in the condition of said corresponding link from an idle to busy condition.
Claim 2
Dependent Claim
185 words
A telephone switching system which includes scanning means for interrogating a plurality of links interconnecting a plurality of switching stages of the system and for deriving busy and idle status signals of said plurality of links to be applied to a register means of the system, wherein the improvement comprises a plurality of diode-gating means responsive to said interrogating signals for applying said busy and idle status signals of said links to said register means, each of said diodegating means being coupled to said scanning means and said register means, and to a corresponding one of said plurality of links, each of said diode-gating means including: a DC potential source; a junction; a first resistive means coupling said DC potential source to said junction; a second resistive element coupling said junction to said corresponding link; a capacitive element coupling said scanning means to said junction; and a first diode means being coupled to said junction and being poled to change from a nonconductive to a conductive statE in response to the change in the condition of said corresponding link from an idle to busy condition.
Claim 3
Dependent Claim
36 words
The switching system in accordance with claim 1, including a plurality of biasing means, each means establishing a predetermined common bias potential level at the outputs of a selected number of said plurality of gating means.
Claim 4
Dependent Claim
62 words
The switching system according to claim 2, wherein said plurality of links generate busy condition signals of different amplitudes, the ratio of said first and said second resistances of each of said plurality of gating means being chosen so that the potentials at the respective junctions are substantially the same irrespective of the differences in the amplitudes of the busy condition signals.
Claim 5
Dependent Claim
26 words
The system in accordance with claim 3, wherein said scanning means generates interrogation pulses each having an amplitude substantially equal to said uniform bias potential level.
Claim 6
Dependent Claim
43 words
The system in accordance with claim 4, wherein each of said biasing means includes a diode poled opposite to said diode means of said gating means and conducting in response to said gating means detecting said busy status signal of the corresponding link.
Claim 7
Dependent Claim
47 words
The system in accordance with claim 5, wherein said plurality of gating means are arranged in a crosspoint gating matrix array of rows and columns, said plurality of biasing means including means for preventing short circuiting of any one of said diode means from affecting other crosspoints.