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：US3575591A

公开(公告)日：1971-04-20

申请号：US3575591D

申请日：1968-09-27

Applicant: INT STANDARD ELECTRIC CORP

Inventor： CHATELON ANDRE EDOUARD JOSEPH ,  LEROUGE CALUDE PAUL HENRI ,  PERRAULT JEAN

IPC: H03M7/50 ,  H04B14/04 ,  H04M3/56 ,  G06F7/50

CPC classification number: H04M3/561

Abstract: There is disclosed an arrangement including a translator to derive two linear code signals from two compressed code signals and compressing the resultant sum of the two linear code signals in the translator after addition in an adder circuit. The translator comprises a shift register operating in two directions and a counter.

公开(公告)号：US3641494A

公开(公告)日：1972-02-08

申请号：US3641494D

申请日：1970-02-12

Applicant: INT STANDARD ELECTRIC CORP

Inventor： PERRAULT JEAN ,  SALLE ADELIN E G

IPC: G08C25/00 ,  G08C25/02 ,  H04B20060101 ,  H04L1/00 ,  H04L1/12 ,  H04L1/10

Abstract: A bidirectional data transmission system for transmitting information between two terminal stations incorporating in each terminal station an arrangement for checking the received data and providing error correction when errors are detected in the received data. Each of the terminals include a memory for storing the m last words transmitted from that terminal. When an error is detected in one terminal, the transfer of received data to a data processor is blocked and a repetition request word is generated and transmitted to the other terminal. The other terminal detects the presence of the repetition request word in the received data and transmits a repetition start word and the last m data words stored in the memory to said one terminal to accomplish the error correction.

Abstract translation: 一种双向数据传输系统，用于在包含在每个终端站中的两个终端站之间传输信息，用于检查所接收的数据并在接收的数据中检测到错误时提供纠错。 每个终端包括用于存储从该终端发送的最后一个字的存储器。 当在一个终端中检测到错误时，将接收到的数据传送到数据处理器被阻塞，并产生一个重复请求字并发送给另一个终端。 另一终端检测接收到的数据中的重复请求字的存在，并将存储在存储器中的重复开始字和最后m个数据字发送到所述一个终端，以完成纠错。

公开(公告)号：US3612772A

公开(公告)日：1971-10-12

申请号：US3612772D

申请日：1969-04-09

Applicant: INT STANDARD ELECTRIC CORP

Inventor： LEROUGE CLAUDE PAUL HENRI ,  PERRAULT JEAN

IPC: H04M3/56

CPC classification number: H04M3/561

Abstract: A PCM circuit adds the speech codes of subscribers who are participating in a conference call. A decoding circuit decodes two PCM codes, and the resulting analog voltages are added together. The sum of the analog voltages are reencoded and sent out to the other subscribers.