公开(公告)号：US3578917A

公开(公告)日：1971-05-18

申请号：US3578917D

申请日：1969-06-16

Applicant: INT STANDARD ELECTRIC CORP

Inventor： GRANDJEAN CHARLES HENRI EMILE ,  PERRAULT JEAN

IPC: H04Q3/545

CPC classification number: H04Q3/545

Abstract: In a telephone exchange comprising a central processor serving several satellite exchanges, a satellite is completely blocked when the cable which connects it to the processor is out of order. According to the invention, each pair of satellites is interconnected by means of a single communication channel so that the transfer of data between the processor and the satellite whose cable is out of order may be effected via another satellite.

公开(公告)号：US3576398A

公开(公告)日：1971-04-27

申请号：US3576398D

申请日：1967-07-24

Applicant: INT STANDARD ELECTRIC CORP

Inventor： DEJEAN JACQUES HENRI ,  GRANDJEAN CHARLES HENRI EMILE ,  LEGER MAX JEAN PIERRE

IPC: H04Q3/545 ,  H04Q3/54

CPC classification number: H04Q3/545

Abstract: A central data processor for controlling the switching of a call through a multiexchange network. A table is developed to list switching paths through the network in the order of their normal occupation level, their priority assignments, and their busy hour priority. Data from the tables are stored on a semipermanent memory. This memory controls the order of search for an idle path through the exchange and causes the lowest occupation level, nonpriority direct paths to be searched first and sequentially searching, if necessary, passes to higher occupation levels and then to indirect paths in the order set out on the developed tables.

公开(公告)号：US3459898A

公开(公告)日：1969-08-05

申请号：US3459898D

申请日：1966-07-26

Applicant: INT STANDARD ELECTRIC CORP

Inventor： DEJEAN JACQUES HENRI ,  GRANDJEAN CHARLES HENRI EMILE

IPC: H04M3/36 ,  H04Q3/00 ,  H04M3/00

CPC classification number: H04Q3/00 ,  H04M3/36