JPS57204652A - Ais detecting circuit - Google Patents
Ais detecting circuitInfo
- Publication number
- JPS57204652A JPS57204652A JP56090583A JP9058381A JPS57204652A JP S57204652 A JPS57204652 A JP S57204652A JP 56090583 A JP56090583 A JP 56090583A JP 9058381 A JP9058381 A JP 9058381A JP S57204652 A JPS57204652 A JP S57204652A
- Authority
- JP
- Japan
- Prior art keywords
- ais
- output
- pulse
- continuous
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
PURPOSE:To ensure the correct detection of an Alarm Indication Signal (AIS) with a simple constitution of the circuit, by using a NOR gate circuit which produces a pulse of a specific duration and secures an NOR between the clock and the data when the pulse is applied to the input. CONSTITUTION:When a multiplexer detects a fault, the signal of continuous 1 is transmitted to the multiplexers of the groups lower than the multiplexer that detected the fault. An NRZ data of continuous 1 is applied to an input terminal A in the figure, and accordingly a pulse is not delivered from the output of an NOR gate circuit 8. As a result, a pulse is not applied to an input I1, and an output O1, i.e., an output C is set at (0). If the output C defines (0) as the reception of AIS, the output C is set at (0) only when the NRZ data of continuous (1), i.e., the AIS is applied to the terminal A. This means that the circuit has the correct detection of the AIS.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56090583A JPS57204652A (en) | 1981-06-11 | 1981-06-11 | Ais detecting circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56090583A JPS57204652A (en) | 1981-06-11 | 1981-06-11 | Ais detecting circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57204652A true JPS57204652A (en) | 1982-12-15 |
Family
ID=14002460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56090583A Pending JPS57204652A (en) | 1981-06-11 | 1981-06-11 | Ais detecting circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57204652A (en) |
-
1981
- 1981-06-11 JP JP56090583A patent/JPS57204652A/en active Pending
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