Patents by Inventor Haresh C. Jotwani

Haresh C. Jotwani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4573151
    Abstract: 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.
    Type: Grant
    Filed: January 20, 1984
    Date of Patent: February 25, 1986
    Assignee: Stromberg-Carlson Corp.
    Inventor: Haresh C. Jotwani
  • Patent number: 4523308
    Abstract: 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.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: June 11, 1985
    Assignee: Stromberg-Carlson Corporation
    Inventors: John Bull, Leon Croft, David B. DeVaney, Russell R. Davis, David L. Hinshaw, Haresh C. Jotwani, Ronald J. Kandell, Richard F. Kurtz, Ernest O. Lee, Jr., Gunter F. Neumeier, Glenn L. Richards, Richard Scott
  • Patent number: 4475011
    Abstract: 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.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: October 2, 1984
    Assignee: Stromberg-Carlson Corporation
    Inventors: Barrie Brightman, Haresh C. Jotwani, Pedro A. Lenk, Rick L. Mantz, Nickoline P. Mealo, Jayantkumar R. Shah, William H. Stewart, John W. Woodward
  • Patent number: 4322844
    Abstract: 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.
    Type: Grant
    Filed: December 10, 1980
    Date of Patent: March 30, 1982
    Assignee: International Telephone and Telegraph Corporation
    Inventors: Frank Fellinger, Michael C. Willett, Haresh C. Jotwani