JPS6480141A - Optical transmission line monitor circuit - Google Patents

Optical transmission line monitor circuit

Info

Publication number
JPS6480141A
JPS6480141A JP62237791A JP23779187A JPS6480141A JP S6480141 A JPS6480141 A JP S6480141A JP 62237791 A JP62237791 A JP 62237791A JP 23779187 A JP23779187 A JP 23779187A JP S6480141 A JPS6480141 A JP S6480141A
Authority
JP
Japan
Prior art keywords
signal
data
level
reception data
rmm
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
JP62237791A
Other languages
Japanese (ja)
Other versions
JPH088584B2 (en
Inventor
Toshinori Kondo
Hajime Yamagata
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.)
Toshiba Corp
Toshiba Telecommunication System Engineering Corp
Original Assignee
Toshiba Corp
Toshiba Telecommunication System Engineering Corp
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 Toshiba Corp, Toshiba Telecommunication System Engineering Corp filed Critical Toshiba Corp
Priority to JP62237791A priority Critical patent/JPH088584B2/en
Publication of JPS6480141A publication Critical patent/JPS6480141A/en
Publication of JPH088584B2 publication Critical patent/JPH088584B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Small-Scale Networks (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To surely prevent a terminal equipment from going to data transmission disabled state by using a carrier sense control circuit so as to restore a carrier sense signal to the off-state when a reception data or a clock before latch is consecutively intermittend for a prescribed time or over. CONSTITUTION:So long as a reception data RD is being entered normally from a RMM 21, a signal M1 is outputted consecutively. When the data transmission of an optical transceiver at the sender side is disabled due to power failure and a shift register 20 stops the shift while remaining the received data RD, an output signal SO of an OR circuit 17 remains at H level. When a prescribed time elapses after the reception data RD is intermittent, the signal M1 goes to an L level at that point of time. Thus, a carrier signal CS is reset when the output of the RMM 21 is at an L level. Thus, the terminal equipment can sends then the data.
JP62237791A 1987-09-22 1987-09-22 Optical transmission line monitoring circuit Expired - Lifetime JPH088584B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62237791A JPH088584B2 (en) 1987-09-22 1987-09-22 Optical transmission line monitoring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62237791A JPH088584B2 (en) 1987-09-22 1987-09-22 Optical transmission line monitoring circuit

Publications (2)

Publication Number Publication Date
JPS6480141A true JPS6480141A (en) 1989-03-27
JPH088584B2 JPH088584B2 (en) 1996-01-29

Family

ID=17020483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62237791A Expired - Lifetime JPH088584B2 (en) 1987-09-22 1987-09-22 Optical transmission line monitoring circuit

Country Status (1)

Country Link
JP (1) JPH088584B2 (en)

Also Published As

Publication number Publication date
JPH088584B2 (en) 1996-01-29

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