Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A subscriber's circuit for a time division switching system which performs switching of speech channels by a highway switch inserted in a highway, comprising: hook information detecting means for detecting hook information, dial information detecting means for detecting dial information, blocking means connected to said hook information detecting means for blocking a speech sending signal digitalized in a PCM format, and control means provided so as to connect to said highway switch, said hook information detecting means said dial information detecting means and said blocking means so that when the hook information detecting means and the dial information detecting means detect the hook information and the dial information, respectively, delivery of the PCM speech sending signal to the highway is prevented by the blocking means for a fixed period of time, and so that the highway is controlled to switch the speech channel, thereby removing a click tone generated by dialing.
Claim 2
Dependent Claim
151 words
A subscriber's circuit for a time division switching system which performs switching of speech channels by a highway switch inserted in a highway, comprising: hook information detecting means for detecting hook information, dial information detecting means for detecting dial information, blocking means connected to said hook information detecting means for blocking a speech sending signal digitalized in a PCM format, and control means provided so as to connect to said highway switch, said hook information detecting means said dial information detecting means and said blocking means so that when the hook information detecting means and the dial information detecting means detect the hook information and the dial information, respectively, delivery of the PCM speech sending signal to the highway is prevented by the blocking means for a fixed period of time, and so that the highway is controlled to switch the speech channel, thereby removing a click tone generated by dialing.
Claim 3
Dependent Claim
143 words
A subscriber's circuit for a time division switching system which changes over a speech sending highway and a speech receiving highway by means of a highway switch, comprising A/D converting means in said speech sending highway for digitizing a speech sending signal of the subscriber's circuit to a digitized speech sending signal to the speech sending highway, D/A converting means in said speech receiving highway for converting a digitized speech receiving signal applied from the speech receiving highway into an analog signal applied to said subscriber's circuit, gate means in said speech receiving highway for gating said digitized speech receiving signal, and control means connected to said subscriber's circuit and said gate means for controlling the gate means, so that during real time processing the speech receiving signal highway is interrupted by opening and closing the gate means without controlling the highway switch.
Claim 4
Dependent Claim
143 words
A subscriber's circuit for a time division switching system which changes over a speech sending highway and a speech receiving highway by means of a highway switch, comprising A/D converting means in said speech sending highway for digitizing a speech sending signal of the subscriber's circuit to a digitized speech sending signal to the speech sending highway, D/A converting means in said speech receiving highway for converting a digitized speech receiving signal applied from the speech receiving highway into an analog signal applied to said subscriber's circuit, gate means in said speech receiving highway for gating said digitized speech receiving signal, and control means connected to said subscriber's circuit and said gate means for controlling the gate means, so that during real time processing the speech receiving signal highway is interrupted by opening and closing the gate means without controlling the highway switch.