Stromberg-Carlson Corporation

International Telephone and Telegraph Corporation

Nokia Siemens Networks Gmbh & Co Kg

Siemens Communications, Inc.

Haresh C Jotwani

Matt Brocco

Glenn L Richards

Pedro A Lenk

Barrie Brightman

Jayantkumar R Shah

David B DeVaney

Frank Fellinger

William H Stewart

John W Woodward

David L Hinshaw

Ernest O Lee

Gunter F Neumeier

Ronald J Kandell

Joel Futterman

Andrew Filtness

Russell R Davis

Rick L Mantz

Nickoline P Mealo

James A Wattwood

Leon Croft

John Bull

Michael Shaffer

Richard F Kurtz

Richard Scott

Michael C Willett

An integrated access platform includes a first port configured to receive a first signal from a plain old telephone service (POTS) and a second port configured to receive a second signal from an asymmetric digital subscriber line (ADSL). The integrated access platform also includes a controller system configured to process the first signal and the second signal for access with external networks.

Integrated access platform

The present invention provides clear and robust arbitration of which of two system controllers is in control of a telecommunications switching system. Each system controller monitors and actively reports its status to a separate arbitration circuit. The resultant signal from the arbitration circuit tells the system which controller to obey. By feedback of its own output unnecessary switching or ill-defined control states are avoided. In particular, if either both or neither system controllers is reporting itself as OK, the system does not switch controllers. In addition, the arbitration circuit is fed redundant clock signals and support, making it effectively redundant.

Method for operating and apparatus for a back-plane supporting redundant circuit cards

A telephone switching network including a remote line switch that couples digital voice signals from a plurality of subscriber lines onto a lesser number of communications links connected to a central office. The remote line switch also includes an intra-nodal switch that switches telephone calls between subscriber lines connected thereto, so that the digital voice signals for the calls need not be transmitted to the central office for switching. The line switch, on receiving a request from the central office for a termination connection to a called line, determines whether both the calling and called lines are connected to it. If they are, and if the line's classes of service as supplied by the central office permit, the line switch establishes a path through its intra-nodal switch to switch the call.

Remote switch for telephony switching system

A telephony network for selectively transmitting voice and supervisory information among a plurality of subscriber lines. The network includes a central office including a switch and a plurality of remote modules each of which connects to several subscriber lines and multiplexes the voice and supervisory information onto a lesser number of highways for transmission to the central office. The central office and remote modules include an interface that connects to the highways and adjusts the format of the voice and supervisory information signals on the highways to the formats of such signals internal to the central office and remote modules, and transmits and receives control messages from and to a control processor at the central office and remote modules. The interface includes an interface module for each highway and redundant sets of control modules which include timing and other control circuitry and which connect to all of the interface modules in the interface.

Interface unit for telephone system having remote units

A line switch including a concentrator arrangement for coupling telephone calls between a plurality of subscriber lines and a plurality of port group highways to a central office switching network in a telephony system. The analog voice signals are first digitized and multiplexed into time slot channels on line group highways for transfer to the concentrator arrangement. The concentrator arrangement couples the digitized voice information signals between time slot channels on any of the line group highways and any of the port group highways. The line switch includes control circuitry that selects the time slot channel, line group highway and port group highway to couple the digitized voice information signals between the subscriber line and the central office matrix switch through the concentrator.

Telephone concentrator switch arrangement

A telephone switching system for telephone lines in a telephone network that carry voice and associated supervisory information signals. The voice signals are received through one of a plurality of ports under the control of a port event processor and are transferred through a switching arrangement, under the control of a call processor, and transmitted through a port again under the control of the port event processor. The received supervisory information is stored in a port data store memory, which also stores call state and command information. The port event processor retrieves the stored supervisory information and commands from the port data store memory, and processes the supervisory information in response to the commands in at least two functional units, and returns processed information for storage in the port data store memory.

Arrangement of interactive telephone switching processors providing

A transmitter-receiver synchronizer is described for use in terminating T1 lines from a subscriber line switch at a central time division multiplexed switching system. A shared rate converter provides bidirectional data rate conversion between the 1.544 Mb/s T1 line and the 2.048 Mb/s switching system. Two buffer memories are used, each writing in at one rate, and reading out at another rate.

Transmitter-receiver synchronizer

Growing community of inventors

Longwood, FL, United States of America

Haresh C Jotwani