JPS6451739A - Sub signal processing circuit - Google Patents
Sub signal processing circuitInfo
- Publication number
- JPS6451739A JPS6451739A JP62209088A JP20908887A JPS6451739A JP S6451739 A JPS6451739 A JP S6451739A JP 62209088 A JP62209088 A JP 62209088A JP 20908887 A JP20908887 A JP 20908887A JP S6451739 A JPS6451739 A JP S6451739A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- clock
- signal
- output
- processing circuit
- 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
Links
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
PURPOSE:To reduce the number of components by switching an output of a clock extraction circuit in other direction to supply the signal to a multiplex conversion circuit if no clock is detected from the output of a unidirectional clock extraction circuit at a fault thereby transferring the sub signal to a low order. CONSTITUTION:A sub signal including a monitor control signal and an ordering signal is given to on input terminal 21, separated by a multiplex inversion circuit 1 and inputted to a monitor control signal processing circuit 10 and an ordering line interface 3. Moreover, the monitor control signal and the ordering signal from the processing circuit 10 and the interface 3 are multiplexed again by a multiplex conversion circuit 4 and outputted from an output terminal 22. The clock operating conversion circuits 1, 4 is extracted by a clock extraction circuit 2. When no clock is extracted at abnormity, a changeover circuit 5 switches the clock of the opposite clock extraction circuit 12 and supplies an output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209088A JPS6451739A (en) | 1987-08-21 | 1987-08-21 | Sub signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62209088A JPS6451739A (en) | 1987-08-21 | 1987-08-21 | Sub signal processing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6451739A true JPS6451739A (en) | 1989-02-28 |
Family
ID=16567077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62209088A Pending JPS6451739A (en) | 1987-08-21 | 1987-08-21 | Sub signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6451739A (en) |
-
1987
- 1987-08-21 JP JP62209088A patent/JPS6451739A/en active Pending
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