The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 1983
Filed:
Feb. 19, 1981
Piero Belforte, Turin, IT;
Renzo Bortignon, Turin, IT;
Abstract
Incoming and outgoing lines on opposite sides of a PCM coupling network, each carrying a recurrent frame with a multiplicity of 8-bit channels which are to be individually tested, have branches extending to an input-side data extractor and an output-side data extractor of substantially identical construction co-operating with a control device such as a microprocessor serving to compare the data extracted in a given time slot from an incoming line with those extracted in a corresponding time slot from an outgoing line coupled thereto. Each extractor, realized in integrated circuitry, comprises a multiplexer for selecting one of the associated lines, a register storing the identity of the line to be selected, and presettable counters stepped by a time base synchronized with the PCM system for enabling the loading of an output register by the multiplexer at the instant when a byte of the desired channel appears on the chosen line. The line-identifying register and the presettable counters are loaded with numerical data from the control device with the aid of several cascaded decoders responsive to instruction from that device.