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7945042 |
Method for switching active calls
A method and apparatus for switching active calls from one entity to another on a network device. The method includes the steps of collecting the call information, designating a second, or target,...
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7602902 |
Method and apparatus for decoding DTMF tones
A method for decoding a DTMF tone which includes collecting the width of serial signals by measuring the time interval between zero-crossing points within a predetermined time; counting within the...
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7227939 |
Security features for an integral PLC modem
At least one exemplary embodiment of the present invention includes a method comprising receiving a connection request at a modem integral to a programmable logic controller, and allowing access to...
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7035394 |
Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals
A tone transmission part transmits a tone signal. A tone signal detection part detects data representing an echo signal of the tone signal transmitted by the tone transmission part, and detects...
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7003093 |
Tone detection for integrated telecommunications processing
Disclosed is an integrated tone detection processor for discriminating between tone and voice signals and determining the tones. The tone detection processor performs Automatic Gain Control (AGC)...
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6771767 |
Signal detector with coefficient swapping transform unit
A signal detector includes a transform unit and a post processing test unit. The transform unit is adapted to a transform unit adapted to receive at least first and second frames of input samples,...
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6434236 |
PC server telecommunications power system
A system within a PC server cabinet for receiving an externally supplied loop feed voltage (−48 VDC) and generating a ringing voltage (75 VAC) from the loop feed voltage. For universal a...
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6381330 |
False tone detect suppression using multiple frame sweeping harmonic analysis
Detection of alerting or other tone signals in a composite signal are reliably detected with an improved false tone detect suppression technique which employs the use of a moving window analysis on...
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6252956 |
Switching system data inheritance method and system
In a switching system data inheritance method of controlling hardware on the basis of a first database storing various management data such as subscriber information to inherit switching system...
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5910984 |
Fault tolerant service-providing apparatus for use in a telecommunications network
A telecommunications network architecture is known comprising a switching system for effecting basic call processing to set up, maintain and clear calls, and service-providing means (SPA)...
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5887058 |
Digit parsing for a flexible dial plan capability in a telecommunications switch
A telecommunications switch (12) includes a dial plan database (300) used for creating, identifying, and verifying dial plan codes and dialing sequences of a desire dial plan (100). The dial plan...
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5812553 |
Multi-path bus digital processor
A multi-path digital signal processor for use in a telephony system provides a first data path for interfacing to a local area network, a second data path for interfacing to a Versa-bus Modular...
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5706031 |
Computing and telecommunications interface system
An icon positioning device with a keypad, telephone circuit, speaker and microphone is used as part of an interface system to a computer and a telephone network. The icon positioning device is used...
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5604740 |
Multi-path bus digital signal processor
A multi-path digital signal processor for use in a telephony system provides a first data path for interfacing to a local area network, a second data path for interfacing to an industry standard...
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5598409 |
Programmable telecommunications switch for personal computer
A user-programmable telephone switch which resides within a commercially available personal computer. The switch is controllable by either the personal computer's microprocessor or a separate,...
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5548640 |
Method for updating a system program in a switching equipment
A method for updating a system program in a switching equipment. Many known, program-controlled switching equipment have a system program deposited in read-only memories. For modifying the system...
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5442691 |
Method and apparatus for call routing in switched digital networks using call control tables
A method and apparatus for routing calls in a switched digital network and a processor for use in such a network are provided in which tables of call control information store information for...
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5418776 |
Emergency local switching
Disclosed is an apparatus and method for providing transmission between end users coupled to a digital loop carder access system. During normal operation, the access system functions to transmit...
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5323452 |
Visual programming of telephone network call processing logic
A system and method for creating and modifying intelligent telephone network call processing logic trees which can be customized for individual customers and created in a user-friendly visual...
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5086461 |
Apparatus and method for providing existing 1ESS and 1AESS telephone switching equipment with the capability of using the SS7 protocol
The invention relates to upgrading existing telephone central offices having 1ESS or 1AESS switching equipment to utilize the SS7 protocol. In particular, the 1ESS and 1AESS switching equipment is...
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5027347 |
Intercom system
The invention relates to an intercom system comprising a central unit and several remote stations connected by two-way lines to the central unit into a star network, whereby the lines are...
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4882699 |
Communications network routing and management system
A large number of potential alphanumeric patterns are ordered in a predetermined sequence which is then used to construct a transition graph composed of machine states along one coordinate and...
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4807282 |
Programmable P/C compatible communications card
A multi-protocol communications adapter (MPCA) is used to interconnect a Local Area Network (such as a store computing system) to a communications highway. The MPCA includes a plurality of protocol...
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4799144 |
Multi-function communication board for expanding the versatility of a computer
A single board multiple option card for expanding the versatility of a host computer includes an onboard microprocessor, a digital signal processor and a switched memory device. The switched memory...
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4799256 |
Telecommunication signalling arrangement
A circuit arrangement for telecommunication installations, in particular, telephone exchange installations is disclosed in which type information is sent ahead of each communication to be...
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4792970 |
Expansion port for use in a communication system
A system for expanding the number of signal ports accommodated by a base communication system having one or more switching circuits for interconnecting a plurality of local signal ports via a...
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4782517 |
System and method for defining and providing telephone network services
A telephone system allows a user to provide new services to terminations in a telephone network. A server having program sequences for controlling its operation connects the terminations and the...
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4782506 |
Arrangement for operating and maintaining a telecommunications system
An operation support system architecture for a telecommunication system contains a control arrangement (BWS) inserted between the system (S) to be operated and an opertor station (DSS). The control...
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4742534 |
Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components
A telephone signalling receiver comprising speech detectors for respective voice-frequency signalling components of push-button (TDK) signals which are in a frequency band divided into lower and...
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4720850 |
Communication system control arrangement
In a switched integrated wideband and narrowband multiservices digital network (FIG. 1), the network control complex (612) includes a program-controlled call processing arrangement (800) that...
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4706280 |
Electronic step-by-step telephone switching system
An electronic step-by-step switching system utilizes much of the equipment now present in conventional electromechanical step-by-step telephone exchange switches. Conventional line finders,...
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4674033 |
Multiprocessor system having a shared memory for enhanced interprocessor communication
A multiprocessor system consisting of a plurality of slave processors and a master processor each connected by a bus to a common memory. Message transfers are implemented by the master which scans...
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4654845 |
Parallel call processing system and method
An arrangement for achieving multi-processing is disclosed for use in a communication system where it is desired to have several independent processors operating in parallel on stimuli received...
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4638123 |
Circuit arrangement for a small PABX with a switching matrix that has electronic crosspoints
In a small PABX with a switching matrix that has electronic crosspoints, integrated selector components comprising multiplexers or demultiplexers in C-MOS technology are used for the switching...
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4633042 |
Electronic micro-controller conversion module for step by step switching apparatus
An improved step-by-step switch assembly includes an electronic controller conversion module. A programmed microprocessor responds to incoming pulse trains of widely variant make and break ratios...
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4631363 |
Method and apparatus for incremental load simulation
An adjustable incremental load simulator 200 acts upon a telephone control processor 300 to drive the processor toward and into an overload state. This is accomplished by reducing the number of...
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4630045 |
Controller for a cross-point switching matrix
A controller for controlling a one-sided switching matrix comprising a plurality of circuit elements under the control of logic circuitry. The controller interprets a request for connection or...
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4628158 |
Stored program controller
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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4626628 |
Telephone line circuit having time-shared DTMF receivers
The invention provides a circuit and method for the time-sharing of a DTMF tone receiver. A DTMF receiver has its input terminal connected to a common output terminal of a pair of transmission...
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4627046 |
Programmable feature card
Programmable feature card circuitry includes: a signal processor with parallel input/output (I/O) data ports and responsive to command of the PBX call processor, signal memory, and a signal...
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4623888 |
Multi-function control interface circuit
An interface circuit includes programmable registers both for making provisioning signals available to a set of electric circuit devices, and for monitoring operation of at least a portion of those...
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4603236 |
Secretarial answering system with distributed processing
A secretarial answering system for use with a switching system which includes a plurality of subscriber telephone stations each equipped with a buzzer, and a secretarial telephone station equipped...
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4593388 |
Signal processors for digital telephone exchanges
A digital telephone exchange including a first and second processor in which the second processor contains algorithms selectable by the first processor for operation of functions within the...
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4575583 |
Programmable digital controller for generating instructions
A programmable digital controller has an address matrix memory (20) and an instruction matrix memory (10). The address memory stores address words each having the address of the first sample and...
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4555595 |
Sampled port data switching system employing interactive processors
A telephone switching system for telephone trunk and subscriber lines that carry voice and associated supervisory information signals. The voice signals are received through one of a plurality of...
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4528658 |
Telecommunication system with a multiplicity of modular units interchanging digital messages
A telecommunication system, e.g. a telephone switching exchange, comprises a multiplicity of substantially identical modular units each including a microprocessor controlling the emission of...
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4527012 |
Communications switching system with modular switching communications peripheral and host computer
A communications switching system is controlled as a peripheral device to a general purpose digital host computer or other host device. The switching system has a plurality of ports for telephone...
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4521879 |
Digital private branch exchange
A digital private automatic branch exchange provides a plurality of ports which may comprise line trunks or operator circuits, the ports being grouped with each group being controlled by an...
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4511762 |
Overload detection and control system for a telecommunications exchange
A method and apparatus for detecting and managing overloads in a telecommunications exchange having a central processor for controlling certain operations of the exchange, line/trunk groups...
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4506346 |
Programmable cartridge telephone communication system
A cartridge comprising circuitry and program instructions is added to a processor controlled telephone communication system to selectively change the operating system in accordance with the...
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