JPS5733862A - Calling system - Google Patents

Calling system

Info

Publication number
JPS5733862A
JPS5733862A JP10768880A JP10768880A JPS5733862A JP S5733862 A JPS5733862 A JP S5733862A JP 10768880 A JP10768880 A JP 10768880A JP 10768880 A JP10768880 A JP 10768880A JP S5733862 A JPS5733862 A JP S5733862A
Authority
JP
Japan
Prior art keywords
call
extension
time
sent out
ringing tone
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
JP10768880A
Other languages
Japanese (ja)
Other versions
JPS6339135B2 (en
Inventor
Kazuhiko Hanawa
Koichiro Yabu
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10768880A priority Critical patent/JPS5733862A/en
Publication of JPS5733862A publication Critical patent/JPS5733862A/en
Publication of JPS6339135B2 publication Critical patent/JPS6339135B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To reduce a noise of a bell sound, by discriminating a call from an extension or a call from a trunk, also effectively executing an instantaneous call, and generating a period in which a ringing tone is not sent out, even when a lot of calls have been made at the same time. CONSTITUTION:For instance, phase 2-1, 2-2 of a call from an extension, and phase 2-4, 2-5 of a call from a trunk repeat a waveform shown in the time 0-7. In case of a phase example 2-3 of an extension call, when a call from an extension has occured during the time 0, 1, 2 and 3, an instantaneous ringing tone of the extension is sent out by an instantaneous call, the extension ringing tone of the next period is sent out only during the time 1, 2 and 3, and after that, the extension ringing tone is sent out repeatedly by the timing of the time 1, 2 and 3. Even case a call from the extension has occured during the time 4, 5 and 6, the instantaneous call is executed, and after that, the ringing tone is sent out by the timing of 5, 6 and 7.
JP10768880A 1980-08-07 1980-08-07 Calling system Granted JPS5733862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10768880A JPS5733862A (en) 1980-08-07 1980-08-07 Calling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10768880A JPS5733862A (en) 1980-08-07 1980-08-07 Calling system

Publications (2)

Publication Number Publication Date
JPS5733862A true JPS5733862A (en) 1982-02-24
JPS6339135B2 JPS6339135B2 (en) 1988-08-03

Family

ID=14465440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10768880A Granted JPS5733862A (en) 1980-08-07 1980-08-07 Calling system

Country Status (1)

Country Link
JP (1) JPS5733862A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913455A (en) * 1982-07-14 1984-01-24 Matsushita Electric Ind Co Ltd Calling signal circuit
JPS6012847A (en) * 1983-07-01 1985-01-23 Meisei Electric Co Ltd Method for sending disconnection signal tone for telephone
JPS6236951A (en) * 1985-08-12 1987-02-17 Oki Electric Ind Co Ltd Call control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913455A (en) * 1982-07-14 1984-01-24 Matsushita Electric Ind Co Ltd Calling signal circuit
JPS6012847A (en) * 1983-07-01 1985-01-23 Meisei Electric Co Ltd Method for sending disconnection signal tone for telephone
JPS6236951A (en) * 1985-08-12 1987-02-17 Oki Electric Ind Co Ltd Call control system

Also Published As

Publication number Publication date
JPS6339135B2 (en) 1988-08-03

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