JPS6480141A - Optical transmission line monitor circuit - Google Patents
Optical transmission line monitor circuitInfo
- 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
Links
Landscapes
- Optical Communication System (AREA)
- Small-Scale Networks (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.
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) |
-
1987
- 1987-09-22 JP JP62237791A patent/JPH088584B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH088584B2 (en) | 1996-01-29 |
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