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7298828 |
Automated telephone line test apparatus with intelligent diagnostic function
A portable, automated telephone line test device includes a test module which applies test signals to a telephone line to be tested and detects electrical characteristics of the telephone line, and...
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7068757 |
Apparatus and method for automated testing of the quality of voice communications over data networks
A slave test unit is used in conjunction with a remote test unit to test voice signal quality parameters, such as clarity, delay and echo. A remote master test unit, or a remote slave test unit,...
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6628756 |
System and method for telephone number verification and identification
A testing environment and a method for telephone number identification and/or verification. The method identifies a telephone number associated with a tested telephone line by: (a) operatively...
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6453153 |
Employing customer premises equipment in communications network maintenance
The present invention customizes a network connection to customer premises equipment using a calibration signal. A network signal processor emits a tag signal indicating that a signal processing...
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6385299 |
Line testing in a telecommunications network
A centralized test apparatus is provided for a telecommunications network which includes local switches and a core network. Each local switch is connected through terminating lines to terminating...
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6049591 |
Grievance call processing system
A grievance call processing system capable of automatically shifting a grievance call reception state to a test state. An electronic switchboard notifies the telephone number information of a...
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6005921 |
Telephone ringback test device and method
A device and method for testing a telephone circuit in which a caller takes advantage of available caller identification information to complete a ringback test without resort to potentially costly...
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5974363 |
Self-testing of smart line cards
Automatic testing a group of line circuits on a smart line card served by a central switch over a PCM bus is localized by using the microprocessor/DSP that provides codec functions for the group of...
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5937034 |
Method for testing call waiting, caller ID functionality of telephone line
The control software of a central office-installed ringback test device is augmented to allow a craftsperson to test the operability of a caller identification, call-waiting (CIDCW) class of...
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5937032 |
Testing method and apparatus for verifying correct connection of curcuit elements
A method and apparatus for testing for correct connection together of circuit elements in a circuit formed of a plurality of redundant circuit portions. A coded signal is generated at a first...
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5857011 |
Multi-port caller ID-based telephone ringback test device
A multi-ported, caller ID-based test unit is installable in the central office of a public switched telephone network. The test unit is capable of determining the telephone number, subscriber name...
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5828728 |
Telecommunications network
Testing of pre-ringing signalling in a telecommunications network at customer's premises, for example, signalling to activate a caller display unit may be effected remotely. By establishing a test...
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4459436 |
Programmable tester for measuring network characteristics
A mechanized system distributing the access, test and communication functions to the point of testing, typically the centralized switching facility serving the telephone loops and equipment to be...
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