JPS57192150A - Transmission and reception circuit - Google Patents

Transmission and reception circuit

Info

Publication number
JPS57192150A
JPS57192150A JP56076002A JP7600281A JPS57192150A JP S57192150 A JPS57192150 A JP S57192150A JP 56076002 A JP56076002 A JP 56076002A JP 7600281 A JP7600281 A JP 7600281A JP S57192150 A JPS57192150 A JP S57192150A
Authority
JP
Japan
Prior art keywords
circuit
logical value
transmission
transmits
failure
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.)
Granted
Application number
JP56076002A
Other languages
Japanese (ja)
Other versions
JPS6365179B2 (en
Inventor
Tomihisa Kusumoto
Takashi Ishikawa
Saneyuki Hiwatari
Tetsuo Nishibashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56076002A priority Critical patent/JPS57192150A/en
Publication of JPS57192150A publication Critical patent/JPS57192150A/en
Publication of JPS6365179B2 publication Critical patent/JPS6365179B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0677—Localisation of faults
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
    • H04L43/0817—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking functioning

Abstract

PURPOSE:To detect failures with a simple device, without the provision of an exclusive failure detecting circuit, by a transmission and reception circuit which detects a failure on a communication line and transmits a predetermined logical signal to an upward device in place of the received binary signal according to the communication state of the data communication line. CONSTITUTION:Outputs of a non-current detecting circuit 8 provided at transmission and reception circuits 3-1'-3-n' of a telegraphic exchanger 1 are applied to a selection circuit 12 installed newly. This circuit 12 transmits the logical value 1 or 0 from a level conversion circuit 7 to a calling detection circuit 10 via a reception data line RD without any modification unless the logical value 1 is applied from the circuit 8. The logical value 1 or 0 received from an exchange processing circuit 9 via a transmission data line SD is transmitted to a transmission line SL. When the circuit 8 detects a non-current state and transmits the logical value 1 to the circuit 12, the circuit 12 transmits the logical value 1 received from a logical value designating line CB in place of the logical value 0 from the circuit 7 to the circuit 10 and the exchanger 1 can detect the failure without using a failure detection circuit.
JP56076002A 1981-05-20 1981-05-20 Transmission and reception circuit Granted JPS57192150A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56076002A JPS57192150A (en) 1981-05-20 1981-05-20 Transmission and reception circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56076002A JPS57192150A (en) 1981-05-20 1981-05-20 Transmission and reception circuit

Publications (2)

Publication Number Publication Date
JPS57192150A true JPS57192150A (en) 1982-11-26
JPS6365179B2 JPS6365179B2 (en) 1988-12-14

Family

ID=13592591

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56076002A Granted JPS57192150A (en) 1981-05-20 1981-05-20 Transmission and reception circuit

Country Status (1)

Country Link
JP (1) JPS57192150A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006067879A (en) * 2004-09-01 2006-03-16 Japan Highway Public Corp Planter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51100602A (en) * 1975-03-03 1976-09-06 Hitachi Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51100602A (en) * 1975-03-03 1976-09-06 Hitachi Ltd

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006067879A (en) * 2004-09-01 2006-03-16 Japan Highway Public Corp Planter

Also Published As

Publication number Publication date
JPS6365179B2 (en) 1988-12-14

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