JPH0286391A - Isdn local communication system - Google Patents

Isdn local communication system

Info

Publication number
JPH0286391A
JPH0286391A JP23655188A JP23655188A JPH0286391A JP H0286391 A JPH0286391 A JP H0286391A JP 23655188 A JP23655188 A JP 23655188A JP 23655188 A JP23655188 A JP 23655188A JP H0286391 A JPH0286391 A JP H0286391A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
terminal equipment
network
signal
loopback
network terminator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23655188A
Inventor
Takashi Yamamoto
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To attain mutual communication without an ISDN network between plural terminal equipments when a terminal equipment is not in the communication state with a network terminal equipment by providing a relay loopback device having a relay function, a loopback function and a switching function switching both the functions.
CONSTITUTION: A relay loopback device 3 installed between a terminal equipment 1 and a network terminator 2 relays a signal from the terminal equipment 1 to the network terminator 2 and a signal from the network terminator 2 to the terminal equipment 1 in the case of communication from the terminal equipment 1 to the network terminator 2. When the terminal equipment 1 does not communicate the network terminator 2, the relay loopback deice 3 includes the signal from the terminal equipment 1 into a signal sent to the terminal equipment 1. Thus, the information is looped back and a specific pattern representing the information loopback state is added and the resulting signal is sent. Thus, when the terminal equipment 1 and the network terminator 2 are not communicated with each other, the terminal equipments 1 are communicated mutually not via the ISDN network.
COPYRIGHT: (C)1990,JPO&Japio
JP23655188A 1988-09-22 1988-09-22 Isdn local communication system Pending JPH0286391A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23655188A JPH0286391A (en) 1988-09-22 1988-09-22 Isdn local communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23655188A JPH0286391A (en) 1988-09-22 1988-09-22 Isdn local communication system

Publications (1)

Publication Number Publication Date
JPH0286391A true true JPH0286391A (en) 1990-03-27

Family

ID=17002329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23655188A Pending JPH0286391A (en) 1988-09-22 1988-09-22 Isdn local communication system

Country Status (1)

Country Link
JP (1) JPH0286391A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015510A1 (en) * 1989-05-30 1990-12-13 Fujitsu Limited Inter-network connection system
JPH05102974A (en) * 1991-10-03 1993-04-23 Sharp Corp Data transmission system
JPH05102973A (en) * 1991-10-03 1993-04-23 Sharp Corp Data transmission system
US5981739A (en) * 1996-09-26 1999-11-09 Bp Amoco Corporation Polyanhydride crosslinked fibrous cellulosic products and process for their preparation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015510A1 (en) * 1989-05-30 1990-12-13 Fujitsu Limited Inter-network connection system
US5185741A (en) * 1989-05-30 1993-02-09 Fujitsu Limited Inter-network connecting system
JPH05102974A (en) * 1991-10-03 1993-04-23 Sharp Corp Data transmission system
JPH05102973A (en) * 1991-10-03 1993-04-23 Sharp Corp Data transmission system
US5981739A (en) * 1996-09-26 1999-11-09 Bp Amoco Corporation Polyanhydride crosslinked fibrous cellulosic products and process for their preparation

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