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3851107 |
FAULT DETECTING DEVICE FOR MULTIPLEX SIGNAL TRANSMISSION SYSTEM
There is provided a fault detecting device for a multiplex signal transmission system which comprises a fault detecting circuit, whereby when a fault occurs in the level signal line for sending...
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3830982 |
TIME DIVISION MULTIPLEX DATA TRANSMISSION SYSTEM HAVING A MONITORING SIGNAL
A data transmission system, in particular a time division multiplex (TDM) pulse code modulation (PCM) system, in which a continuous sequence of individual signals is transmitted includes a...
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3795771 |
PASSENGER ENTERTAINMENT/PASSENGER SERVICE AND SELF-TEST SYSTEM
A time multiplexed passenger entertainment and service combined system suitable for distribution throughout compartments of super airplanes. Common power supplies, cabling, and boxes, and hybrid...
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3769454 |
METHOD AND APPARATUS FOR TESTING TELETYPEWRITER TERMINALS
A method and apparatus are provided for the automatic testing of a data communication terminal and a data communication link to which the terminal is connected. A conventional data set or modem in...
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3760114 |
FAULT DISCRIMINATION CIRCUIT
A fault discrimination circuit for a group of registers of a time division multiplex communication system. Each register of the group has a fault counter for counting faults detected by the...
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3725614 |
COMMUNICATION ARRANGEMENT ALLOWING NETWORK PATH TESTING
Terminating circuits for a switching network provide crosspoint bias current, pulse transfer, and path testing. Pulse transfer occurs by allowing the bias current to represent one binary value and...
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3697698 |
PARI-MUTUEL OFF-TRACK BETTING SYSTEM
An off-track betting system in which a plurality of ticket issuing machines at off-track locations permit selection and entry of input data comprising a proposed bet transaction and provide...
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3696210 |
DATA TRANSFERRING SYSTEM UTILIZING A MONITOR CHANNEL AND LOGIC CIRCUITRY TO ASSURE SECURE DATA COMMUNICATION
The transmitter-encoder of the data transferring system utilizes polybinary, correlative encoding to develop an information carrying signal, which includes a monitor signal having a known data...
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3548105 |
OVERLOAD MONITOR FOR TRANSMISSION SYSTEMS
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3492445 |
SWITCHING INSTALLATION SUPERVISION SYSTEMS
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3478318 |
SLOW DATA RATE TELEMETERING AND DATA LOGGING SYSTEM HAVING AURAL ALARM MEANS
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3470331 |
FAULT-GENERATED SURGE RESPONSIVE FAULT LOCATING SYSTEM FOR FREQUENCY DIVISION MULTIPLEXED TRANSMISSION FACILITIES
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3430144 |
FAULT ALARM SYSTEM FOR TWO-WAY PULSE COMMUNICATION SYSTEMS
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3259695 |
Malfunction monitoring of time-division multiplex pcm equipment
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3214734 |
Protection signalling system having channel impedance alteration means for providing indications of remote station conditions
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3087144 |
Ramp self-testing system
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3061679 |
Alarm signaling system
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2794071 |
Power line fault locator
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