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1979-12-26 |
1981-10-20 |
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1979-12-26 |
1981-07-21 |
Bell Telephone Laboratories, Incorporated |
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1980-12-23 |
1983-09-20 |
Gte Automatic Electric Labs Inc. |
Dual rail time control unit for a T-S-T-digital switching system
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1980-12-23 |
1983-07-05 |
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Dual rail time and control unit for a T-S-T-digital switching system
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1980-12-23 |
1983-08-16 |
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Dual rail time and control unit for a duplex T-S-T-digital switching system
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1980-12-23 |
1983-08-30 |
Gte Automatic Electric Labs Inc. |
Dual rail time and control unit for a duplex T-S-T-digital switching system
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1980-12-23 |
1983-08-16 |
Gte Automatic Electric Labs Inc. |
Dual rail time and control unit for a duplex T-S-T-digital switching system
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1980-12-23 |
1983-08-16 |
Gte Automatic Electric Labs Inc. |
Dual rail time and control unit for a T-S-T-digital switching system
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1981-03-30 |
1984-04-10 |
Datapoint Corporation |
Digital information switching system
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1981-07-17 |
1984-09-06 |
Siemens AG, 1000 Berlin und 8000 München |
Schaltungsanordnung für zentralgesteuerte Fernmeldevermittlungsanlagen, insbesondere für Zeitmultiplex-Fernsprechvermittlungsanlagen, mit Informationsaustausch zwischen teilzentralen Einrichtungen über eine zentrale Einrichtung
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1981-08-21 |
1986-12-04 |
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1981-09-11 |
1984-07-31 |
Mitel Corporation |
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1981-09-18 |
1984-06-26 |
International Telephone And Telegraph Corporation |
Telephone line circuit and system
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1982-01-07 |
1986-12-02 |
Rockwell International Corp. |
Integrated voice and data telecommunication switching system
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JPS58136164A
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1982-01-29 |
1983-08-13 |
Fujitsu Ltd |
集中監視方式
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1982-04-22 |
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International Telephone And Telegraph Corporation |
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1982-06-14 |
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Communication arrangements for distributed control systems
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1982-07-27 |
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1982-08-23 |
1984-11-20 |
At&T Bell Laboratories |
Control information communication arrangement for a time division switching system
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1982-08-26 |
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1982-10-05 |
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PBX telephone system I/O interface
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1983-02-18 |
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Switching system with separate supervisory links
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1983-04-29 |
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One-for-N redundancy in a digital switch matrix
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1983-05-11 |
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1983-05-11 |
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1983-05-11 |
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1983-05-11 |
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1983-06-27 |
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1990-02-27 |
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1983-12-06 |
1985-06-04 |
At&T Bell Laboratories |
Time-slot interchanger for fast circuit switching
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1984-03-16 |
1987-05-20 |
Plessey Co Plc |
Digital line termination unit command interface
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1984-04-26 |
1987-02-17 |
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PCM channel multiplexer/demultiplexer
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1984-06-29 |
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Information transport system
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1985-02-07 |
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1985-02-07 |
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Directory number translation in a distributed control switching system
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American Telephone And Telegraph Company, At&T Bell Laboratories |
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American Telephone And Telegraph Company, At&T Bell Laboratories |
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1986-02-18 |
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1986-03-14 |
1988-01-19 |
American Telephone And Telegraph Company At&T Bell Laboratories |
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1986-03-14 |
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1986-06-13 |
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Packet switch
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1986-09-05 |
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時分割交換システム
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1992-05-19 |
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Switching system reliability
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High bandwidth packet switch
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Distributed interactive multimedia system architecture
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Time slot designing device, time slot designing method, and recording medium having time slot designing program stored thereon
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