公开(公告)号：US3591719A

公开(公告)日：1971-07-06

申请号：US3591719D

申请日：1968-06-07

Applicant: BELL TELEPHONE LABOR INC

Inventor： CROWSON FRED B ,  PREVITE RICHARD A

IPC: H04L12/26 ,  H04L25/04 ,  H04L25/02

CPC classification number: H04L43/50

Abstract: An automatic test circuit for simultaneously testing a plurality of data sets wherein the test circuit provided for each data set a multiphase program which includes sending test signals to the data set and measuring the distortion of signal received from the data set. During a measuring phase the test circuit enables each data set to contend for a common measuring circuit to apply signals to the measuring circuit upon seizure thereof and to thereafter release from the measuring circuit in response to a signal from the data set. The test circuit then either advances to the next program phase if the distortion of the measured signals is below a predetermined threshold level or again bids for the measuring circuit to repeat the measuring phase if the distortion exceeds the threshold level.

公开(公告)号：US3133152A

公开(公告)日：1964-05-12

申请号：US17833562

申请日：1962-03-08

Applicant: BELL TELEPHONE LABOR INC

Inventor： BACHELET ALBERT E ,  CROWSON FRED B ,  LARGE WAYNE V K ,  MARTINGANO GERALD A ,  PREVITE RICHARD A ,  REHM THEODORE C ,  SMITH TODD A

IPC: H04L12/00

CPC classification number: H04L12/00

公开(公告)号：US3087025A

公开(公告)日：1963-04-23

申请号：US4659760

申请日：1960-08-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： ABBOTT HENRY H ,  MARTIN CHARLES R ,  PREVITE RICHARD A ,  WALSH HENRY J ,  WALSH JOHN G

IPC: H04M9/00

CPC classification number: H04M9/00

公开(公告)号：US3037087A

公开(公告)日：1962-05-29

申请号：US4659560

申请日：1960-08-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： ABBOTT HENRY H ,  MARTIN CHARLES R ,  OLSEN ORVING C ,  PREVITE RICHARD A ,  WALSH HENRY J ,  WALSH JOHN G

IPC: H04M9/00

CPC classification number: H04M9/00