U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 6266829

Combination Beverage Container and Spittoon

A combination beverage container and spittoon includes a bottom portion including outer wall and a first inner wall defining a spittoon space.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 379/240 - Interexchange trunk circuit


Subclass of Class 379 - Telephonic communications
Definition: Subject matter including trunk circuit switching.
No. of patents: 45
Last issue date: 11/13/2007


1    
NumberTitleIssue Date
7295603Method and system for virtual exchange reference impact (VERI) for use in mixed spectrum management in DSL
A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet syste...
11/13/2007
7224686Method of and apparatus for mediating common channel signaling messages between networks using a pseudo-switch
A communication network includes an SS7 Security Gatekeeper that authenticates and validates network control messages within, transiting, entering and leaving an overlying control fabric such as an SS7 network. The SS7 Security Gatekeeper incorporates several levels...
05/29/2007
7113989Command line interface processor
A method of interacting with a managed data network entity is provided. The method includes a sequence of steps. A change in the operational state of the managed data network entity is detected. A CLI dictionary entry is retrieved form a CLI dictionary associated wi...
09/26/2006
7039175Configurable digit collection for various signaling protocols
A PSTN (Public Switching Telephone Network) device includes a Dynamically Configurable Signaling State Machine (DCSSM). The DCSSM can be programmed to recognize multiple signaling templates. The DCSSM can also be programmed to modify existing recognized standardized...
05/02/2006
7039703Dynamically modifying functionality in a configurable communications protocol stack
In one embodiment of the present invention, a method for dynamically modifying functionality in a configurable communications protocol stack includes, at an interface device, operating a protocol stack that includes existing protocol stack software operable to proce...
05/02/2006
7031454Method and apparatus for interfacing telephone apparatus to a digital, analog or hybrid telephone switching system
An adaptive interface method and apparatus for interfacing a telephony appliance such as an analog telephone, modem, fax modem, facsimile machine teleconferencing device, headset, VoIP telephone or non-compatible digital telephone to a digital, analog or hybrid tele...
04/18/2006
6792098Inter-network line level adjustment method and system
An inter-network line level adjustment system includes a switch (SW1) and a processing unit (24) for identifying calls between a remote telephone network and a local telephone network. Echo cancellers (20) and/or speech coders (22) collec...
09/14/2004
6661885System and method for updating trunk group translations
A translation file containing trunk group, trunk level and other translation data is created on a translation input system in response to a circuit provisioning request. An interface between the translation input system and a trunk inventory system transf...
12/09/2003
6603850Telephone line rollover service for ATM/ADSL based systems
A method and system for providing rollover service from a competitive local exchange carrier (CLEC) is disclosed. A routing table is provided which includes call reference values stored within a local bypass system. An incoming call is checked against the...
08/05/2003
6510218Process for distributing engagement requests depending on direction in two-way trunk groups
A method for directional distribution of allocation in two-way alternate line bundles which are switched between computer-assisted exchange facilities in voice and data networks. This traffic management method makes it possible to ensure full capability o...
01/21/2003
6480596Direct inward-outward dialing trunk circuit
A direct inward-outward dialing (DIOD) trunk circuit having a DIOD detecting/sending circuit connected to tip and ring terminals connected to a central office line and a primary coil of a transformer, for detecting a polarity of the voltage potential at t...
11/12/2002
6275578Method 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 capabilities to temporarily replace the failed out-of-band capa...
08/14/2001
6148073Network centric call processing architecture using distributed call segments
An apparatus and method for allocating a data path during a call by establishing a first network call segment associated with an agent and sending a message with routing information across a tandem link using predetermined signaling paths. A second embodi...
11/14/2000
5933491Switched integrated network access system
When it is determined, within a local exchange company (LEC) central office of a switched integrated network access (INA) network, that there are insufficient links to handle a terminating call to a competitive LEC (C-LEC) customer, the apparent status of...
08/03/1999
5875244Transmission 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 enables direct relay of exchange trunk signals (Sxt) and ...
02/23/1999
5844981Method and system of improved routing to WATS
A method and system of improved routing to WATS completes calls through a wide area telephone service using indirect routing. When a call is placed from a calling telephone station to a called telephone station, a telephone network attempts to route the c...
12/01/1998
5774538Exchange service starting system
An exchange service starting system subject to a minimum of processing burdens without limiting the scope of exchange services available to subscribers. A number dialed by a subscriber placing a call is analyzed by a number analyzing unit. The result of a...
06/30/1998
5717750Method for prohibiting continual routing of a call between central office switches due to translation data error
A method for detecting translation data error in a central office switch comprises: receiving a call directed to a ported directory number in a switch; retrieving translation data from the switch memory to connect the call to a customer line; and determin...
02/10/1998
5414763Apparatus and method for providing echo suppression to a plurality of telephones
A telephone switching apparatus includes a line network to which first and second telephones are connected and a hands-free trunk whose input and output terminals are connected to the line network. The line network is controlled such that voices from the ...
05/09/1995
5151935Programmable universal signaling circuit for a telephone network
A programmable universal signaling circuit for use in a universal channeling unit of a telephone network. The programmable universal signaling circuit uses a line converter and decoder circuit which under control of a microprocessor generates a unique set...
09/29/1992
5018195Fully integrated telecommunication network
In order to extend a new unit to a telecommunication network comprising a plurality of units often distributed geographically and interconnected by means of transmission lines, or adapting the software of the various units, without causing problems with t...
05/21/1991
4930153PBX voice mail interface
An interface is described which attaches between the incoming trunk lines from a central office and a PBX system and which monitors the communication between the central office and the PBX to record the signals representative of telephone extension of a c...
05/29/1990
4899379Circuit arrangement for the connection of line circuits of a digital time multiplex-telephone network
A circuit for implementing a connection of an operational amplifier, and for achieving the switchable sensitivity of the same, as well as the in-and-out switchable filter elements, which results in a low cost, universally applicable line circuit interconn...
02/06/1990
4894860Trunk interface circuitry for telephone systems
This invention relates to improved trunk interface circuitry for telephone system common equipment, which is used to connect a local customer system to a central office of the telephone company. The improved trunk interface comprises an active two-termina...
01/16/1990
4853955Apparatus and method for providing existing telephone switching equipment with the capability of using the SS7 protocol
The invention relates to upgrading existing telephone central offices which utilize electromechanical or electronic switching equipment incapable of using the SS7 protocol. In particular, it relates to providing the switching equipment with the capability...
08/01/1989
4815124DX 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 signaling link. The DX circuit senses the magnitude and direc...
03/21/1989
4689816Three relay C. O. trunk interface
An interface system having a single detector to detect incoming signalling including ringing, tip ground, forward loop current, and reverse loop current. Relays and bias control are utilized to perform outgoing signalling and for configuring the system to...
08/25/1987
4636584Signaling protocol channel unit
Disclosed is a channel unit for directly interconnecting a toll office multiplex carrier channel line and a terminal unit line such as that of a private branch exchange (PBX) or a telephone station set, thereby eliminating the normal local end office inte...
01/13/1987
4321431Trunk circuit with single coupling transformer
A trunk circuit comprises a first lead pair for carrying two-way signals, a second lead pair for carrying two-way signals, a circuit for electrically coupling an incoming signal from the second lead pair to the first lead pair, a first transformerless cir...
03/23/1982
4311879AC Supervisory signal detector circuit
An AC supervisory signal detector circuit for use in conjunction with a trunk circuit of a PABX telephone system connected to a telephone central office. Valid AC supervisory signals are detected to the exclusion of noise signals and response time for det...
01/19/1982
4310725Interface for private branch exchange
An interface for connecting a PBX line (18) to a central office trunk (15) and for providing a supervisory signal (28) and accepting PBX hook switch and dial pulse inputs (30), being readily adaptable to ground start trunks and loop start trunks. A pair o...
01/12/1982
4182936Transformerless trunk circuit
A transformerless two-way trunk circuit particularly useful for interconnecting a balanced lead pair and an unbalanced lead pair, with complete control over sidetone and signal level. The balanced lead pair is terminated with a first matching A.C. impedan...
01/08/1980
4151377High impedance loop-seizing and dial pulsing circuit
An improved loop-seizing and dial pulsing circuit arrangement of the type employed in telephone trunks has an extremely low insertion loss. The circuit comprises a diode bridge connected across a telephone loop and a controlled constant current source con...
04/24/1979
4135061Device for blocking a junctor of an automatic switching system
The invention comes within the field of telephone equipment and relates in articular to the control of the blocking of a junctor in an automatic switching system. It comprises a first interface circuit followed by an antinoise device, an enabling circuit a...
01/16/1979
4133982AC supervisory signal detector circuit
An AC supervisory signal detector circuit for use in conjunction with a trunk circuit of a digital PABX telephone system interfacing with a central office providing for detection of relatively low frequency AC voltages which may be superimposed upon a DC ...
01/09/1979
4113986Telephone controlled lock release arrangement
Circuitry is disclosed for the automatic dial-up of an apartment telephone from a lobby telephone to provide voice communication therebetween via a central switching office and for controlling the establishment of a switched signaling path through a switc...
09/12/1978
4087645Telephone switching system
A telephone switching system utilizing matrices composed of monolithic chips which include a plurality of cross points and controls therefor. The lines and trunks attached to the unique matrices include unique circuitry, such as two-way amplifiers, which ...
05/02/1978
4058685Interoffice loop supervision arrangement
An arrangement for preventing false reseizures of loop-signaling, repeat coil-coupled interoffice trunk circuits for telephone switching systems is disclosed. In the prior art, false reseizures of an incoming trunk circuit can be caused by discharge of th...
11/15/1977
4053709Telephone connector
A telephone junctor for interconnecting an electromechanical and an electronic automatic exchange, the latter using tone signaling and capable of operating in time-division-multiplex. The junctor permits direct inward dialing of a subscriber on the electr...
10/11/1977
4049919Communication system trunk circuit
A trunk circuit for interconnecting an electronic and a step-by-step electromechanical switching exchange including a sensing circuit that is transparent to the transmission and supervisory signals. The sensing circuit consists of a pair of voltage divide...
09/20/1977
1    
 
Sign InRegister
Username  
Password   
forgot password?