JPS5484908A - Scanning system of subscriber line - Google Patents

Scanning system of subscriber line

Info

Publication number
JPS5484908A
JPS5484908A JP15325277A JP15325277A JPS5484908A JP S5484908 A JPS5484908 A JP S5484908A JP 15325277 A JP15325277 A JP 15325277A JP 15325277 A JP15325277 A JP 15325277A JP S5484908 A JPS5484908 A JP S5484908A
Authority
JP
Japan
Prior art keywords
scanning
tim
driven
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
Application number
JP15325277A
Other languages
Japanese (ja)
Inventor
Shigeki Hashimoto
Kozo Nakamura
Tetsuo Sagara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15325277A priority Critical patent/JPS5484908A/en
Publication of JPS5484908A publication Critical patent/JPS5484908A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/72—Finding out and indicating number of calling subscriber

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To enable to scan the subscriber lines with a simple constitution and control, by sequentially designating the scanning of the scanning matrix line with the shift register controlled with the central control unit. CONSTITUTION:When the signal receiving and distribution unit SRD receives the scanning instruction from the central control unitcc via the SP address bus SPAB, the timing circuit TIM is driven and shift clock is given from TIM to the shift register SR, the state ''1'' of the initial set position of SR is shifted by one bit, the line corresponding to the bit location of ''1'' is driven with the scanning drive section SCNDV, and the scanning line of the scanning matrix circuit SCNMTX is sequentially selected and driven every scanning designation from CC. The read-in signal from the result is fed to the read-in circuit SA and is delivered to the SP answer bus SPWB with the clock from TIM.
JP15325277A 1977-12-20 1977-12-20 Scanning system of subscriber line Pending JPS5484908A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15325277A JPS5484908A (en) 1977-12-20 1977-12-20 Scanning system of subscriber line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15325277A JPS5484908A (en) 1977-12-20 1977-12-20 Scanning system of subscriber line

Publications (1)

Publication Number Publication Date
JPS5484908A true JPS5484908A (en) 1979-07-06

Family

ID=15558384

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15325277A Pending JPS5484908A (en) 1977-12-20 1977-12-20 Scanning system of subscriber line

Country Status (1)

Country Link
JP (1) JPS5484908A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656090A (en) * 1979-10-15 1981-05-16 Hitachi Ltd Scanning circuit system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5656090A (en) * 1979-10-15 1981-05-16 Hitachi Ltd Scanning circuit system

Similar Documents

Publication Publication Date Title
GB2022969A (en) Video display control apparatus
ES2057074T3 (en) EXCITATION DEVICE AND IMAGE REPRESENTATION SYSTEM.
JPS545637A (en) Communication control unit
EP0004797A3 (en) Video display control apparatus
JPS6446834A (en) Generator for address and branch target address
JPS5484908A (en) Scanning system of subscriber line
JPS5768982A (en) Display device
JPS5282500A (en) Group control system of automatic vending machines
JPS53123627A (en) Display unit
JPS52115198A (en) Liquid crystal matrix panel
JPS563487A (en) Magnetic bubble memory control system
JPS522330A (en) Data processig unit
JPS5443429A (en) Multiple series input process system
JPS5282125A (en) Chinese character input system
JPS559227A (en) Character display system using gas discharge panel
JPS556947A (en) Periodic pulse checking system
JPS53126220A (en) Character display unit
JPS55116132A (en) Format display system
JPS57142076A (en) Video switching device
JPS5467334A (en) Display unit for character and sexadecimal number
JPS5472384A (en) Sequence controller
JPS5487431A (en) Information display unit
JPS54823A (en) Display control system for ruled line pattern
JPS5412234A (en) Control system for buffer registor
JPS4948358A (en)