公开(公告)号：FR2462006A1

公开(公告)日：1981-02-06

申请号：FR7919131

申请日：1979-07-20

Applicant: IBM FRANCE

Inventor： MORLEC EMILE ,  REYNES DANIEL ,  SUZZONI JEAN-PIERRE

IPC: H01F19/00 ,  H03H11/48 ,  H04M19/00 ,  H04Q3/42 ,  H04Q3/52 ,  H01F17/00 ,  H04B3/18 ,  H04M1/76

Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.

公开(公告)号：DE3275052D1

公开(公告)日：1987-02-12

申请号：DE3275052

申请日：1982-06-25

Applicant: IBM ,  IBM FRANCE

Inventor： GODARD DOMINIQUE ,  MORLEC EMILE

IPC: G01R23/02 ,  H04L27/26 ,  H04Q1/45 ,  H04Q1/457

公开(公告)号：FR1494357A

公开(公告)日：1967-09-08

申请号：FR06007961

申请日：1966-07-26

Applicant: IBM FRANCE

Inventor： CROISIER ALAIN ,  MORLEC EMILE ,  PQULET ALAIN

IPC: H04M19/02