JPS5612189A - Multiplexer - Google Patents
MultiplexerInfo
- Publication number
- JPS5612189A JPS5612189A JP8721079A JP8721079A JPS5612189A JP S5612189 A JPS5612189 A JP S5612189A JP 8721079 A JP8721079 A JP 8721079A JP 8721079 A JP8721079 A JP 8721079A JP S5612189 A JPS5612189 A JP S5612189A
- Authority
- JP
- Japan
- Prior art keywords
- lgm
- communication channel
- tty
- mctl
- constitution
- 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
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Time-Division Multiplex Systems (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
PURPOSE:To reduce the hardware of a control system by enabling in-use/stand-by switching automatically at a communication channel side. CONSTITUTION:Holding memory LGM is composed of rewritable RAM and controller MCTL which writes information in LGM is connected so as to rewrite externally the contents of LGM through input unit TTY, thereby performing the connection switching of channels. Since LGM uses RAM, an electric power failure, etc., erases the contents of LGM and it takes much time to make a reconnection, so redundant constitution of one system, two systems, etc. with divided electric power feed is employed. In addition to the redundant constitution of one or two systems of a communication channel, a common circuit is provided previously and this common circuit displays a fault on alarm display circuit ALD and further operates in-use/ stand-by change-over circuit ACT/SBY to change communication channel over. As a result, the need to connect expensive MCTL and TTY to the communication channel all the time is eliminated and only each one MCTL and TTY are needed for multiplexers.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8721079A JPS5612189A (en) | 1979-07-10 | 1979-07-10 | Multiplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8721079A JPS5612189A (en) | 1979-07-10 | 1979-07-10 | Multiplexer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5612189A true JPS5612189A (en) | 1981-02-06 |
Family
ID=13908573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8721079A Pending JPS5612189A (en) | 1979-07-10 | 1979-07-10 | Multiplexer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5612189A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6354898U (en) * | 1986-09-30 | 1988-04-13 | ||
JPH0220137A (en) * | 1988-07-08 | 1990-01-23 | Hitachi Ltd | Subscriber line multiple converter |
-
1979
- 1979-07-10 JP JP8721079A patent/JPS5612189A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6354898U (en) * | 1986-09-30 | 1988-04-13 | ||
JPH0220137A (en) * | 1988-07-08 | 1990-01-23 | Hitachi Ltd | Subscriber line multiple converter |
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