JPS561646A - Channel switching system - Google Patents
Channel switching systemInfo
- Publication number
- JPS561646A JPS561646A JP7720479A JP7720479A JPS561646A JP S561646 A JPS561646 A JP S561646A JP 7720479 A JP7720479 A JP 7720479A JP 7720479 A JP7720479 A JP 7720479A JP S561646 A JPS561646 A JP S561646A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- channel switching
- detecting circuit
- common control
- main wire
- 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
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Monitoring And Testing Of Exchanges (AREA)
Abstract
PURPOSE:To ensure the easy setting of the talking circuit between the main wire and the specific extension at the abnormal time, by installing the abnormal working detecting circuit of the common control circuit and the channel switching circuit in the PBX. CONSTITUTION:The abnormal working state of the common control circuit is detected at the detecting circuit, and the channel switching circuit is actuated with the output of the detecting circuit. Thus the extension telephone is connected directly to the main wire with no intervention of the PBX switch. As a result, the extension telephone can carry out the originating and terminating.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7720479A JPS561646A (en) | 1979-06-19 | 1979-06-19 | Channel switching system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7720479A JPS561646A (en) | 1979-06-19 | 1979-06-19 | Channel switching system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS561646A true JPS561646A (en) | 1981-01-09 |
Family
ID=13627289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7720479A Pending JPS561646A (en) | 1979-06-19 | 1979-06-19 | Channel switching system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS561646A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6388947A (en) * | 1986-10-02 | 1988-04-20 | Fujitsu Ltd | Trouble processing method for exchanging system |
-
1979
- 1979-06-19 JP JP7720479A patent/JPS561646A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6388947A (en) * | 1986-10-02 | 1988-04-20 | Fujitsu Ltd | Trouble processing method for exchanging system |
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