Paradyne Corporation

Harvey H Harris

Thomas V Saliga

Joseph M Looney, Jr

Dale M Walsh

Cletus L Gardenhour

Luther V Weathers

Luke G Smithwick

Victor Lindberg

A MOS/LSI digital filter comprising multiplier circuitry with more than one serial multiplier section, accumulator circuitry with overflow correction and true sign logic, and coefficient circuitry is contained in special MOS/LSI devices.

Digital filter

An error-free, data telecommunication system designed for continuous high speed error-free data communications over dial-up voice grade circuits comprising a high speed data transmission section including internal data buffering and a low speed reverse channel ARQ (automatic request for repeat) receiver and a high speed data receiving section including a low speed reverse channel ARQ transmitter whereby high speed data and reverse ARQ signaling are transmitted simultaneously over a two wire dial-up network. The system is capable of half-duplex, two wire operation and full-duplex, four wire operation.

Data telecommunication system

A telecommmunications analyzer for monitoring transmission line performance comprising a transmission line test means including a transmitter means to generate at least one predetermined transmission test signal corresponding to the transmission line parameter under test and a receiver means including a parameter test means to receive and monitor receipt of the predetermined transmission line test signal wherein a local and remote telecommunications analyzer are coupled together over the transmission line to monitor the transmission line parameter under test, and means to record and display the parameter monitored. The telecommunications analyzer may include a control means to provide automatic sequential testing of a plurality of predetermined transmission line parameters. The telecommunications analyzer may also include a modem test integrity means and interface means to monitor and display EIA RS-232 control line performance and modem integrity performance.

Telecommunications analyzer

Growing community of inventors

Clearwater, FL, United States of America

Harvey H Harris