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公开(公告)号：IT8023020D0
公开(公告)日：1980-06-26
申请号：IT2302080
申请日：1980-06-26
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：IT1151017B
公开(公告)日：1986-12-17
申请号：IT2302080
申请日：1980-06-26
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：DE3069214D1
公开(公告)日：1984-10-25
申请号：DE3069214
申请日：1980-06-24
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：CA1100651A
公开(公告)日：1981-05-05
申请号：CA295077
申请日：1978-01-17
Applicant: IBM
Inventor： GRANGE JEAN-CLAUDE , HERNANDEZ PHILIPPE , REYNES DANIEL , SUZZONI JEAN-PIERRE , TU NGHIEM
IPC: H04M19/02
Abstract: TELEPHONE LINE SWITCHING The subject invention relates to a telephone line circuit and to the logic associated therewith, in order to detect the various possible line status, more especially to detect an off hook status during ringing. The circuit is essentially comprised of a first detector (DA) sensitive to the line current phase, a second detector (DB) sensitive to the ringing voltage phase, and two pulse generators (RTG1 and RTG2), of the same frequency as the ringing voltage, appearing at the positive and negative zero-crossings of the ringing voltage, respectively. When only the ringing current is applied to the line, only the signals from both detectors and the first generator are simultaneously present (once per period). When the called subscriber lifts his handset, the signals from both detectors and the second generator are also simultaneously present once per period. These pulse coincidences are detected and processed by an appropriate logic. FR9-76-016 - 1
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Patent Agency Ranking
公开(公告)号：FR2352448A1
公开(公告)日：1977-12-16
申请号：FR7616128
申请日：1976-05-21
Applicant: IBM FRANCE
Inventor： FERRY MICHEL , REYNES DANIEL
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公开(公告)号：AU533622B2
公开(公告)日：1983-12-01
申请号：AU5904480
申请日：1980-06-04
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
IPC: H01F19/00 , H03H11/48 , H04M19/00 , H04Q3/42 , H04Q3/52 , H03H7/38 , H03H11/28 , H04B3/16 , H04M1/58
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：CA1141454A
公开(公告)日：1983-02-15
申请号：CA352841
申请日：1980-05-27
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
Abstract: DEVICE FOR INCREASING THE PARALLEL INDUCTANCE OF A TRANSFORMER A device for increasing the parallel inductance of a transformer, consisting of a negative inductance element, connected across a winding of the transformer. In a particular application of the invention to telephone line transformers, the negative inductance elements are connected in the vicinity of the middle junctors of the switching net work. Thus, each element enables the parallel inductance of the line transformers to be increased when these line transformers are connected to the junctor through switches of the switching network. The number of negative inductance elements required is much lower than the number of transformers. FR9-79-017
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公开(公告)号：FR2462006A1
公开(公告)日：1981-02-06
申请号：FR7919131
申请日：1979-07-20
Applicant: IBM FRANCE
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：FR2386210A1
公开(公告)日：1978-10-27
申请号：FR7710338
申请日：1977-03-31
Applicant: IBM FRANCE
Inventor： GRANGE JEAN-CLAUDE , HERNANDEZ PHILIPPE , REYNES DANIEL , SUZZONI JEAN-PIERRE , TU NGHIEM HO
Abstract: A circuit associated with a telephone line to detect line status includes a first detector sensitive to the line current phase, a second detector sensitive to the ringing voltage phase, and two pulse generators of the same frequency as the ringing voltage, appearing at the positive and negative zero-crossings of the ringing voltage, respectively. When only the ringing current is applied to the line, only the signals from both detectors and one generator are simultaneously present (once per period). When the called subscriber lifts his handset, the signals from both detectors and the other generator are also simultaneously present once per period. These pulse coincidences are detected and processed by an appropriate logic.
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