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7415029 |
Programmable FSM engine using a new CAS application language
An apparatus including a private branch exchange (PBX) switch, a residential gateway to receive channel associated signals (CAS) from the PBX switch, and a programmable CAS module to convert the...
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RE40057 |
Method and apparatus for providing interoperation between a digital communication system and a public switched telephone network
An interworking unit ( 14 ) for providing an interface between a digital communication network ( 12 ) and a public switched telephone network (PSTN) ( 16 ) includes a de-vocoder ( 30 ), a protocol...
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6744880 |
Method for creating a telephone digital switching platform
A method for creating a telephone digital switching platform to provide conversion and routing of telephone calls arriving on a number of telephony interfaces to a number of outbound telephony...
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6366664 |
Method and system for translating call processing requests
A generic translator ( 10 ) is provided for processing service requests sent by a digit collection client ( 16 ). Requests include billing validation ( 11 ), call routing ( 19 ), call screening (...
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6275578 |
Method and apparatus for providing back-up, in-band signaling in a communications network
A method of detecting and recovering from an out-of-band signaling failure in a telecommunications network involves the reprogramming of switching centers to utilize existent inband signaling...
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5940467 |
Counting circuit
Quality requirements on a counter may set a limit to the highest frequency that can be applied to the counter. This will also limit the resolution. A counter is provided including a generator for...
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5937343 |
Method and system for updating replicated databases in a telecommunication network system
A method and system of the present invention updates a replicated database of a telecommunications network system. A call transport system forwards calls from a local telephone station to a...
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RE36228 |
Call progress capability for a switched channel data service unit
A method and apparatus is provided within an interface to data terminal equipment for obtaining call progress information. The call progress information provides relevant data as to the progress of...
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5875244 |
Transmission apparatus for relaying different types of trunk signals
A transmission apparatus for relaying different types of trunk signals, including a central processing unit including a reception counter processor which is inserted between a pair of exchanges and...
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5577117 |
Methods and apparatus for estimating and adjusting the frequency response of telecommunications channels
In methods and apparatus for estimating the frequency response of telecommunications channels, signals carried on the channels are divided into pluralities of signal segments of limited duration,...
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5533111 |
System for originating and receiving telephone calls over a virtual piped connection, and specialized customer premise equipment for use in the system
Access (or egress) charges payable by an IXC to a LEC, and payable by the subscriber to the LEC for originating or terminating calls and for associated vertical call control features, are reduced...
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5402479 |
Method and apparatus for translating signaling information
An office interface unit (OIU) transfers data and signaling between a telephone local exchange and distribution lines. Information from the telephone local exchange is contained in repetitive...
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5259027 |
Dial restoral method for digital circuits
A switched digital circuit is used to restore a failed dedicated digital circuit to a remote station in conjunction with reconfiguration of the network's multipoint junction units (MJU). A circuit...
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4939774 |
Method for controlling a digital telephone set and a telephone set based on the same
A method for controlling a digital telephone set coupled to an integrated services digital network, includes the following procedure. It is determined whether a telephone number of a destination...
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4815124 |
DX circuit
An improved DX circuit may be connected to signaling and reference leads of a DX signaling link, without need to balance the internal impedance of the DX circuit against that of the external DX...
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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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4075569 |
Digital method and apparatus for dynamically generating an output pulse train having a desired duty cycle from an input pulse train
The pulses of an output pulse train are made to conform to a desired duty cycle within the limits afforded by the individual cyclical periods of an input pulse train by digitally measuring each...
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3940570 |
Apparatus for combining a central telephone trunk line with a customer telephone trunk line
A system for combining a central telephone trunk line with the trunk line of a customer exchange wherein said central telephone exchange is provided with means for separating the dial, talk, and...
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3882283 |
Method and apparatus for detecting the presence of signal components of predetermined frequency in a multi-frequency signal
A method and apparatus for detecting the presence or otherwise of a particular frequency component in a pulse coded multi-frequency signal in which ones of the pulse sequence representing the...
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3835260 |
COMMUNICATION SWITCHING SYSTEM, WITH MARKER, REGISTER, AND OTHER SUBSYSTEMS COORDINATED BY A STORED PROGRAM CENTRAL PROCESSOR
A stored program computer is used for functions such as digit analysis and routing control where flexibility is important, while a wired logic time division multiplex register-sender subsystem is...
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3775754 |
DIAL-OPERATED DATA EXCHANGE SYSTEM
A data exchange system of the dial-operated type having a central store to contain the operating relationships between the feeders and trunks of the system, and in which exchange functions are...
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3627954 |
CALL-SIGNALING PROCESSOR IN A TELEPHONE-SWITCHING SYSTEM
A program-controlled telephone switching system wherein dial pulse transmission to trunks is effected by a plurality of dial pulse sender circuits which are connected to terminals of the...
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3558827 |
TELEPHONE SWITCHING SYSTEM WITH INDEPENDENT SIGNALLING CHANNELS EMPLOYING TIME-DIVISION MULTIPLEX
Branched telephone switching system including a principal exchange, intermediate subsidiary exchanges connected to the principal exchange through first information and signalling trunk channels and...
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3524940 |
TELEPHONE PLANT WITH SATELLITE EXCHANGES CONNECTED BY RADIAL AND TRANSVERSE CHANNELS
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3487174 |
PULSE TRANSMISSION DEVICE FOR INTERTRAFFIC EQUIPMENT IN LOUDSPEAKER PRIVATE BRANCH EXCHANGES
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3364310 |
Automatic call recording system
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3319007 |
Arrangement for operationally matching different telephone systems
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3317895 |
Control of remote telephone and like equipments
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3210473 |
Trunk circuit pad-control arrangements
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3178517 |
Interoffice signalling arrangement
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3098125 |
Routing means for telephone system
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3043915 |
Circuit arrangement for increasing the capacity of traffic in a telephone system
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3009021 |
Circuit arrangement for telephone systems comprising markers for controlling the setting of switches
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2968696 |
Electronic telephone system
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2962556 |
Signalling circuit for high capacity exchange systems
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2958734 |
Trunk-connected private automatic branch exchange
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2916554 |
Telephone system
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2900450 |
Dial system
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2809236 |
Telephone apparatus
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2797262 |
Automatic telephone systems
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RE14462 |
Title is not available
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