公开(公告)号：US3426453A

公开(公告)日：1969-02-11

申请号：US3426453D

申请日：1967-05-22

Applicant: IBM

Inventor： DINGWALL ROBERT P ,  MARCAR HAIK

IPC: B43L1/00 ,  G09B1/08 ,  G09F7/04

CPC classification number: B43L1/008

公开(公告)号：US3434131A

公开(公告)日：1969-03-18

申请号：US3434131D

申请日：1965-12-13

Applicant: IBM

Inventor： DINGWALL ROBERT P

IPC: G11B20/14 ,  G11B5/00

CPC classification number: G11B20/1411

公开(公告)号：US3609692A

公开(公告)日：1971-09-28

申请号：US3609692D

申请日：1968-10-22

Applicant: IBM

Inventor： BLAKE ROBERT M ,  DINGWALL ROBERT P

IPC: G06F11/30 ,  G06F9/00 ,  G06F11/34 ,  G06F13/00 ,  H04L12/26 ,  H04L13/08 ,  H04Q5/00

CPC classification number: H04L43/00 ,  G06F11/3485 ,  G06F11/349 ,  H04L13/08 ,  H04L43/10

Abstract: A monitoring arrangement for enabling communication between a data processing system and remote users thereof in which there are included means for enabling communication between an operator and the system to permit examination of the data being sent by the system, means for enabling communication between remote users and the system to permit examination of the data being sent by the users to the system and means for alternately consecutively enabling the system information and the user information to be observed to effectively achieve bidirectional intercommunication between the system and the users. The arrangement is capable of operating in both the audio and digital modes.

公开(公告)号：CA858783A

公开(公告)日：1970-12-22

申请号：CA858783D

Applicant: IBM

Inventor： DINGWALL ROBERT P ,  MARCAR HAIK

公开(公告)号：CA774764A

公开(公告)日：1967-12-26

申请号：CA774764D

Applicant: IBM

Inventor： DINGWALL ROBERT P