JPS54101610A - Clock supply system - Google Patents
Clock supply systemInfo
- Publication number
- JPS54101610A JPS54101610A JP812178A JP812178A JPS54101610A JP S54101610 A JPS54101610 A JP S54101610A JP 812178 A JP812178 A JP 812178A JP 812178 A JP812178 A JP 812178A JP S54101610 A JPS54101610 A JP S54101610A
- Authority
- JP
- Japan
- Prior art keywords
- clocks
- lead
- clock
- line
- 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
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
- Time-Division Multiplex Systems (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
PURPOSE:To simplify the supply source of clocks by extracting clocks transmitted on a line and using them as clocks in a stored program control-type time division exchange. CONSTITUTION:Clocks from line 3 are extracted by terminal circuit 4 and are sent to clock route selection circuit 6 through lead 5. Clock route selection circuit 6 determines a line whose clocks should be used and transmits the determined result to clock generation circuit 14 through lead 7. Clock generation circuit 14 generates various kinds of timing clock and supplies clocks to switch part 1 and processing part 2 through lead 9 and lead 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP812178A JPS54101610A (en) | 1978-01-27 | 1978-01-27 | Clock supply system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP812178A JPS54101610A (en) | 1978-01-27 | 1978-01-27 | Clock supply system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54101610A true JPS54101610A (en) | 1979-08-10 |
Family
ID=11684447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP812178A Pending JPS54101610A (en) | 1978-01-27 | 1978-01-27 | Clock supply system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54101610A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56170633U (en) * | 1980-05-21 | 1981-12-16 | ||
JPS58138159A (en) * | 1982-02-10 | 1983-08-16 | Fujitsu Ltd | Timing generating system in terminal controller |
JPH01151840A (en) * | 1987-12-09 | 1989-06-14 | Hitachi Ltd | Digital subscriber line synchronization system |
EP0456258A2 (en) * | 1990-05-11 | 1991-11-13 | Canon Kabushiki Kaisha | Network synchronization unit for a telephone exchange |
-
1978
- 1978-01-27 JP JP812178A patent/JPS54101610A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56170633U (en) * | 1980-05-21 | 1981-12-16 | ||
JPS617481Y2 (en) * | 1980-05-21 | 1986-03-07 | ||
JPS58138159A (en) * | 1982-02-10 | 1983-08-16 | Fujitsu Ltd | Timing generating system in terminal controller |
JPS6322708B2 (en) * | 1982-02-10 | 1988-05-12 | Fujitsu Kk | |
JPH01151840A (en) * | 1987-12-09 | 1989-06-14 | Hitachi Ltd | Digital subscriber line synchronization system |
JP2510635B2 (en) * | 1987-12-09 | 1996-06-26 | 株式会社日立製作所 | Digital subscriber line synchronization system |
EP0456258A2 (en) * | 1990-05-11 | 1991-11-13 | Canon Kabushiki Kaisha | Network synchronization unit for a telephone exchange |
US5331667A (en) * | 1990-05-11 | 1994-07-19 | Canon Kabushiki Kaisha | Telephone exchange apparatus with communication line clocking |
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