JPS56132839A - Digital radio circuit switching system - Google Patents
Digital radio circuit switching systemInfo
- Publication number
- JPS56132839A JPS56132839A JP3630080A JP3630080A JPS56132839A JP S56132839 A JPS56132839 A JP S56132839A JP 3630080 A JP3630080 A JP 3630080A JP 3630080 A JP3630080 A JP 3630080A JP S56132839 A JPS56132839 A JP S56132839A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- dpu
- stand
- existing
- monitoring signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
PURPOSE:To obtain a digital radio circuit switching system, by which a circuit is not cut off instantaneously, that is to say, the bit synchronizing frame is not out of synchronizm, at the time of switching, in the digital transmission system which is equipped with both the existing (n) and stand-by (m) circuits. CONSTITUTION:DIV is a branch power board for making the existing circuit branch to the stand-by circuit, TX SW is a sending-end parallel switch for simultaneously sending out a signal of the existing circuit to the stand-by circuit, TX DPU is a transmission code converter for inserting a circuit monitoring signal and a frame pulse, and RX DPU is a receiving code coverter for removing a circuit monitoring signal and a frame pulse, and detecting a circuit monitoring signal. Now, in case when the bits between each system are stepped out, they are pulled in by the TX DPU. And, when a fault has been detected, the fault information is sent out to the receiving end AS, and the receiving-end change-over switch RX SW is operated immediately.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3630080A JPS5941335B2 (en) | 1980-03-24 | 1980-03-24 | Digital wireless line switching method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3630080A JPS5941335B2 (en) | 1980-03-24 | 1980-03-24 | Digital wireless line switching method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56132839A true JPS56132839A (en) | 1981-10-17 |
JPS5941335B2 JPS5941335B2 (en) | 1984-10-06 |
Family
ID=12465957
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3630080A Expired JPS5941335B2 (en) | 1980-03-24 | 1980-03-24 | Digital wireless line switching method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5941335B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6167344A (en) * | 1984-09-11 | 1986-04-07 | Nec Corp | Circuit switching device |
US5327275A (en) * | 1990-10-30 | 1994-07-05 | Fujitsu Limited | Switching system of optical transmission lines for protecting from trouble |
WO2001086926A1 (en) * | 2000-05-09 | 2001-11-15 | Fujitsu Limited | Node device and no-short-break switching device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2514643Y2 (en) * | 1990-08-30 | 1996-10-23 | 株式会社ニコン | Cameras that allow slow sync shooting |
-
1980
- 1980-03-24 JP JP3630080A patent/JPS5941335B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6167344A (en) * | 1984-09-11 | 1986-04-07 | Nec Corp | Circuit switching device |
JPH043700B2 (en) * | 1984-09-11 | 1992-01-24 | ||
US5327275A (en) * | 1990-10-30 | 1994-07-05 | Fujitsu Limited | Switching system of optical transmission lines for protecting from trouble |
WO2001086926A1 (en) * | 2000-05-09 | 2001-11-15 | Fujitsu Limited | Node device and no-short-break switching device |
Also Published As
Publication number | Publication date |
---|---|
JPS5941335B2 (en) | 1984-10-06 |
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