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4051328 Method for operating a digital time division multiplex communication network  
A digital time division multiplex communication network wherein the subscriber terminals are disposed in a fixed order on a TDM trunk going out from and ending in the terminal exchange is...
4037199 Apparatus for sensing, transmitting and displaying signal states  
Apparatus for sensing, communicating and displaying signal states in a multiplicity of functional units is described. A signal multiplexer is assigned to each given functional unit; the...
4032714 PCM time division multiplex communication network with digital subscriber stations  
A PCM time division multiplex communication network is disclosed having a central processing office and digital subscriber stations. A special code word is prefixed to the PCM data sent by the...
4016369 Addressing arrangements for communications networks  
An addressing arrangement is disclosed for systems in which communication is required between a main device and a plurality of associate devices. In the arrangement, access messages are used...
4000378 Data communication system having a large number of terminals  
A large number of terminals are connected to a central computer in a loop utilizing a very high speed transmission medium. A sequential stream of message blocks are provided for transmission by...
3990036 Multiplexing method and apparatus for telemetry of seismic data  
A single time-multiplexed channel for telemetry of seismic data from a plurality of remote, spaced-apart sensors to a central recording device. All of the sensors are identical and...
3840706 REMOTE TEST CIRCUIT FOR CARRIER TELEPHONES  
In the preferred embodiment of the invention disclosed herein, a testing circuit is provided in a carrier telephone communication system for determining, from a central office location, the...
3795895 POLLING INTERRUPT FOR DATA INFORMATION SYSTEM  
A polling interrupt for a data information system in which a plurality of terminals on a single communication channel may be sequentially polled. The address subsequently transmitted over the...
3755628 TIME DIVERSITY, MULTI-REDUNDANT DATA SYNCHRONIZED TRANSMISSION SYSTEM  
Four independent data stations, each having data sources and data responders, transmit data signals from one to another in response to commands, in the nature of polling instructions or addresses,...
3752932 LOOP COMMUNICATIONS SYSTEM  
A communications system including a central station connected in a series loop with a plurality of remote stations and in which under control of said central station, the remote stations in the...
3728681 DATA LOOP COMMUNICATION PRIORITY ESTABLISHING APPARATUS  
The method of configuring communication units, all of which are connected in series on a loop such that some units may take priority and communicate out of the logical sequential order. This is...
3723971 SERIAL LOOP COMMUNICATIONS SYSTEM  
A communications system including a central station connected in a series loop with a plurality of remote stations and in which under control of said central station, the remote stations in the...
3702008 PROGRAM FOR POLLING PARTY LINE DATA STATIONS FOR MESSAGE PICKUPS  
Data stations on multistation lines are polled for messages in accordance with a program which directly varies the number of times each station is polled during a polling round with the quantity...
3603932 PARTY LINE STATIONS FOR SELECTIVE CALLING SYSTEMS  
In a party line message distribution system, each station is arranged to provide a delayed response to a common polling or query code on a time division basis by inserting into a time slot...
3517130 COMMUNICATION MULTIPLEXING CIRCUIT FEATURING NON-SYNCHRONOUS SCANNING  
3493683 SYSTEM FOR TESTING LINE CIRCUITS IN A MULTIPLEX EXCHANGE SYSTEM,AND FOR PERFORMING OPERATING PROCESSES INDICATED BY SUCH TESTS  
3244804 Time delay controlled remote station transmission to central data collecting station  
3098215 Data storage and transmission system