JPS5679595A - Display system of line status for terminal device - Google Patents

Display system of line status for terminal device

Info

Publication number
JPS5679595A
JPS5679595A JP15596079A JP15596079A JPS5679595A JP S5679595 A JPS5679595 A JP S5679595A JP 15596079 A JP15596079 A JP 15596079A JP 15596079 A JP15596079 A JP 15596079A JP S5679595 A JPS5679595 A JP S5679595A
Authority
JP
Japan
Prior art keywords
display element
dma
signal
illumination
distinguishing
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
Application number
JP15596079A
Other languages
Japanese (ja)
Other versions
JPS6141198B2 (en
Inventor
Makoto Ueno
Toshifumi Eto
Tsunetaka Sakata
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP15596079A priority Critical patent/JPS5679595A/en
Publication of JPS5679595A publication Critical patent/JPS5679595A/en
Publication of JPS6141198B2 publication Critical patent/JPS6141198B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Abstract

PURPOSE:To speed up flickering of display elements, by transmitting a display element illumination and a distinguishing information per telephone set written in the direct memory access buffer during specified minimum illumination, distinguishing time. CONSTITUTION:At the agreement of the input from TEL1-TEL4 and the input data predetermined by the memory at the CPU of the main device, the write-in signal WS is given to the direct memory access buffer DMA-BF to write in the display information. In the control section CONT, the address signal AS and the readout signal RS are given to DMA-BF based on the clock pulse CL, and the interpretation signal of count output of CL is input to the AND gates A1-A4. Thus, during the minimum illumination, distinguishing time predetermined, the display element illumination, distinguishing information per telephone set written in DMA-BF is transmitted every telephone set with fidelity. Thus, the flickering of high speed display element is obtained and various displays are made on one display element.
JP15596079A 1979-11-30 1979-11-30 Display system of line status for terminal device Granted JPS5679595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15596079A JPS5679595A (en) 1979-11-30 1979-11-30 Display system of line status for terminal device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15596079A JPS5679595A (en) 1979-11-30 1979-11-30 Display system of line status for terminal device

Publications (2)

Publication Number Publication Date
JPS5679595A true JPS5679595A (en) 1981-06-30
JPS6141198B2 JPS6141198B2 (en) 1986-09-12

Family

ID=15617286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15596079A Granted JPS5679595A (en) 1979-11-30 1979-11-30 Display system of line status for terminal device

Country Status (1)

Country Link
JP (1) JPS5679595A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212295A (en) * 1985-07-10 1987-01-21 Matsushita Electric Ind Co Ltd Key telephone system
JPS6424552A (en) * 1987-07-20 1989-01-26 Fujitsu Ltd Pilot lamp blinking control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6212295A (en) * 1985-07-10 1987-01-21 Matsushita Electric Ind Co Ltd Key telephone system
JPS6424552A (en) * 1987-07-20 1989-01-26 Fujitsu Ltd Pilot lamp blinking control system

Also Published As

Publication number Publication date
JPS6141198B2 (en) 1986-09-12

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