Matches 101 - 124 out of 124 < 1 2 3


Match Document Document Title
5170338 Apparatus for carrying out serial control and method of controlling said apparatus  
An apparatus for carrying out serial control and a method of controlling the apparatus wherein the apparatus and the method are employable for a centralized control system for various machinery...
5166925 T carrier network test apparatus and method  
A customer service unit (CSU) with adjunct equipment is connected to the end of a T Carrier link at the trunk side of a CPE switch such as a PBX and includes one or more connections around the CPE...
5163056 Apparatus for carrying out serial control  
An apparatus for carrying out serial control includes a single main controller and a plurality of node controllers for directly controlling a variety of sensors and actuators. The node controllers...
5140625 System for testing 2B1Q telephony loopback circuits and method therefor  
A system for testing 2B1Q private line data telephony circuits having 2B1Q modulation between the network channel termination equipment and the channel unit. 2B1Q modulation is provided over a...
5136589 Apparatus for using duplex transmission line in network  
In a network system, a duplex transmission line has two transmission lines. Each transmission line, which is connected to a transmitting section, a receiving section and a serial/parallel...
5132962 Fault isolation and bypass reconfiguration unit  
A multiport access and reconfiguration unit for use in a dual token ring network is provided with three adapters which in the presence of an internal fault establishes an isolated token ring which...
5124990 Diagnostic hardware for serial datalink  
Full diagnostic capability is provided in a serial datalink network having a plurality of control modules. Each control module includes a differential receiver for providing noise immunity and a...
5111460 Process for the localization of defective stations in local networks and associated interface controller  
A process for the localization of defective stations in local networks which consist of several locally distributedly operating stations is proposed, particularly for use in automobiles. The...
5105426 Device for detecting the position of broken line in a series controller  
When a press or like machine is centrally controlled, many sensors are used for detecting the conditions of various portions of the machine and many actuators are used for controlling the...
5023872 FDDI bit error rate tester  
Methods and apparatus are set forth which facilitate continuous bit error rate monitoring at the physical (PHY) management layer in a Fiber Distributed Data Interface (FDDI), duel token ring...
5023873 Method and apparatus for communication link management  
A communication link manager for problem determination and recovery of a failing resource on a communication link segment in a data communication network. When a problem occurs on a link segment,...
4939730 Auto isolation circuit for malfunctioning current loop  
In a data communication system including a plurality of remote units under the control of a master controller, whereby each of the remote units operates to transmit and receive data from the...
4918623 Testing the performance of a communication line between two modems using modem processor  
Apparatus for testing the performance of a communication line that carries customer data between two modems, including a programmable processor (for example, a digital signal processor) in each...
4907227 In-line coupling circuit for a closed-loop communication terminal  
An in-line coupling circuit for a POS terminal, includes a coupling section connected in a communication line and electrically connecting the POS terminal to the communication line. The in-line...
4777330 Network system diagnosis system  
A station diagnosis method in a communications network system including a closed ring transmission line and a plurality of data stations which can be connected to the ring transmission line by a...
4697268 Data processing apparatus with message acceptance monitoring  
Data processing apparatus includes a number of units connected by a bus over which each unit can send public write messages to all the other units in parallel. The units are connected in a loop by...
4633468 Detecting and recovering from fault condition in a serial loop data transmission system  
Terminals in a serial loop communication system monitor the loop to detect a unique polling message. Failure to detect the polling message forces the terminals into an error checking routine. The...
4552997 Arrangement for loop analysis testing for a digital switching system  
The present invention is an interconnection of a loop analysis test system (LATS) to a digital switching system. This arrangement includes the utilization of existing network units to establish a...
4462099 Error source excluding data transmission system  
A data transmission system comprising a plurality of terminal units each having at least one input and at least one output connected such that each connected input of a terminal unit is connected...
4410985 Data transmission system and method  
A central station and a plurality of transmission stations are connected in cascade by a serial transmission line, and constitute a looped data highway system. The central station controls the...
4390984 Status check method for a data transmission system  
In a data transmission system with such a construction that a plurality of terminal units are connected to a first and a second loop transmission line for transmitting messages in a first...
4385384 Modem diagnostic and control system  
A system for diagnosing and controlling operation of a plurality of modems, some located at a central site and others at various remote sites. A processor located at the central site selectively...
4006456 Loop fault location and isolation  
A simplified loop communication fault location and isolation circuit which utilizes sequences of power interruption pulses in DC power distributed on the signal lines from a master repeater to...
3821495 SIGNAL LOOP TESTING APPARATUS  

Matches 101 - 124 out of 124 < 1 2 3