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7617303 |
Systems and method for optimizing access provisioning and capacity planning in IP networks
The present invention provides a method for avoiding demand forecast errors in a network topology model having a plurality of nodes, by monitoring and controlling the quantity of a selected port...
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7542550 |
System for testing subscriber lines and method thereof
The present invention discloses a system for testing subscriber lines and method thereof. The system includes a broadband line testing control module and a remote terminal subscriber access control...
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7035380 |
Line sharing multipoint POTS splitter with intelligent termination
The present invention provides for a system and method for blocking leakage signals and uncoupling connections in a communication system. A leakage signal (LS) blocking splitter employs a high-pass...
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6741848 |
Method and system of offering wireless telecommunication services in a visited telecommunication network
A method and system of offering wireless telecommunication services in a visited telecommunication network for a terminal device which does not have a first identifier accepted by the network. In...
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6577710 |
Method for checking a switching center, line unit and switching center for implementing the method, as well as an appertaining computer program
A method for checking a switching center is explained, whereby reference data are checked in the memory of the switching center. On the basis of status data, a processor determines the operational...
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6549610 |
Subscriber circuit having splitter disconnection function
A subscriber circuit allowing a reliable and proper subscriber line test is disclosed. The subscriber circuit includes a splitter and a feeder for feeding a current to subscriber equipment through...
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6282266 |
Concentrated dynamic test path rooting
A system in accordance with the invention dynamically establishes test connections upon initiation of a test sequence and does not need to maintain permanently "nailed up" test connections. To do...
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6259768 |
Method of, and apparatus for, carrying out loopback test in exchange
A method employs simple procedures to speedily carry out loopback tests on devices that form a channel system of an exchange. The method is capable of quickly locating a fault in the exchange and...
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5940478 |
Method and system for extended addressing plans
Communications system (10) that includes a network hub system (12), (14) and (16) connectable to external voice messaging systems (24), (26), (28), (30), (32), (34), (36), (40), (42) and (44). The...
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5596623 |
Testing and complaint accepting communication unit
A communication box which operates as a testing and complaint accepting communication unit and which is connected with a workstation which can communicate with a call processor for controlling a...
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5579368 |
Device for monitoring a switch
A switch sentry device (22) having a digital telephony switch (SCX, 16), a device (24) for processing information, a device (24, 34) for simulating a call from the processing device (24) to the...
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5392328 |
System and method for automatically detecting root causes of switching connection failures in a telephone network
An operating system is provided for an analog switching machine having switch fabric formed by multiple line and trunk link networks having interconnected switch stages with each switch stage...
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5386454 |
Remotely controlled multiple pair telephone pedestal/building terminal
A remotely controlled telephone system terminal box provides non-blocking connectivity between any selected unassigned pair of a plurality X of distribution pairs of lines and any selected...
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5384823 |
Telecommunications switch with integral feature installation capability
The operating system control device in a telecommunications switch is capable of operating under the control of software instructions associated with a new switch feature for executing a series of...
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5295177 |
Automatic terminal start/stop verification system using call processing simulator
In an automatic terminal start/stop verification system, a terminal start/stop simulation unit which simulates a task module of a call processing program for an exchange. The exchange has call...
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5198808 |
Matrix switch apparatus with a diagnosis circuit having stand-by ports and reduced size matrix switching elements
In a matrix switch apparatus with a diagnosis circuit, a switch unit is positioned between a group of input line interface circuits and a group of output line interface circuits. The switch unit...
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4692939 |
Switch testing
Switches of telephone grids are tested for delayed action subsequent to, but within a number of milliseconds after, actuating the opening or closing of the switches. Excessive delay indicates...
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4670897 |
Circuit testing of telephone grids or the like
Multiple electrical path assembly as in a telephone grid, is rapidly and accurately checked by grounding one end of all but one of the path conductors, applying a test signal to that one end,...
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4516076 |
Fault detection arrangement for relay switching system
An arrangement for detecting faults in automatic test systems of the type wherein test points in a unit under test are connected to test instruments by the programmed closure of electromechanical...
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4228328 |
Signal distributor test arrangement
An arrangement for testing relay contacts of a signal distributor is disclosed. The output relay contacts are coupled via isolation diodes to a common circuit node and the input relay contacts are...
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4147901 |
Relay margin test set
Disclosed is a telephone system test apparatus for a telephone switching system having tip and ring circuits which cause a control relay to close upon completion of a path therebetween and which...
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4045623 |
Short circuit indicator for a terminator matrix
A matrix of electrical termination points arranged in pairs is provided with a detection circuit for detecting short circuits between termination points. A transistor circuit is associated with...
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3971893 |
Control system and process for a space-division switching network
Controls are provided for a space-division switching network with relay crosspoint matrices, each crosspoint having four switching coils or windings. A crosspoint relay is switched when two pairs...
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3941949 |
Method and apparatus for isolating malfunctions occurring in sender-receiver communication switching system equipment
A method and apparatus for isolating malfunctions occurring in a communication switching system having a line switching network for establishing communications selectively between calling and...
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3922499 |
Communication switching system network control arrangement
A network control arrangement for a communication switching system having a group of switching network units each having a plurality of inlets and a plurality of outlets and having a plurality of...
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3919503 |
Apparatus for establishing cross connections in an automated main distributing frame
An automated actuator for establishing and terminating cross connections in an automated main distributing frame system by inserting and removing connectors on pin terminal switches within a lineup...
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3859479 |
MONITORING ARRANGEMENT FOR A STEP-BY-STEP SWITCHING TRAIN
An arrangement is disclosed for identifying which switch in a plurality of selector switches arranged in a switching train may be operating incorrectly. All of the selector switches of the...
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3803364 |
MARKER POWER FAILURE MAKE BUSY CIRCUIT
A power failure make busy arrangement in a marker for preventing or inhibiting an assigner from accessing a marker when it has suffered a power failure. The busy/idle lead from a marker to each...
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3604860 |
CHANGE OF STATE DETECTOR
An arrangement for identifying the change of state of any one of a group of switching devices includes first and second groups of intersecting conductors. Each conductor is connected through a...
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3600525 |
TEST SET FOR STROWGER SWITCHES
A test set particularly for equipment such as PBX, CDO and large telephone central offices, and comprising a hand-portable and compact boxlike, case-type unit in which is incorporated means to test...
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3578916 |
TELEPHONE SWITCHING SYSTEMS
Device for detecting in a switching system including crosspoint matrices, those of said matrices which have faulty crosspoints. The switching system comprises crosspoint matrices interlaced with...
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3562449 |
PROCESS AND APPARATUS FOR TESTING TELEPHONE SELECTOR CIRCUITS AND THE LIKE
Process and apparatus for testing the continuity and polarity of telephone selector trunk lines and the operation of the dial responsive relay in selectors wired to such trunk lines. A current...
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3553384 |
TELEPHONE SWITCHING UNIT WITH LOCAL AND REMOTE COMPUTER CONTROL
A telephone switching system having a switching unit under the control of a local computer and a remote computer, each of said computers including a permanent program store having recorded therein...
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3536902 |
SEQUENCE STEP CHECK CIRCUIT
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3519752 |
CROSSPOINT SELECTOR FOR REED RELAY MATRIX
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3488459 |
CHECKING CONNECTIONS IN SWITCHING GRIDS
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3431363 |
NOR LOGIC SCREENING TRANSLATOR
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3351721 |
Method and switching arrangement for preventing improper settings in devices of telephone exchange installations
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3351722 |
Telephone automatic test circuit
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3300592 |
Telephone test circuit
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3265820 |
Apparatus for testing telephone switching systems
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3206729 |
System for ascertaining from a distance the electrical conditions of a switching device
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3184710 |
Method and arrangement for checking the operative condition of a contact matrix
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3159716 |
Link circuit
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3086084 |
Circuit for detecting and restoring off-normal selectors
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3047841 |
Marginal checking means for electrical pulse circuits
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3019388 |
Signal timing circuit
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2914624 |
Automatic routiner for selector and connector switches
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2876287 |
Line finder allotting systems
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2873323 |
Automatic telecommunication systems
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