JPS5271904A - Telephone set calling system - Google Patents

Telephone set calling system

Info

Publication number
JPS5271904A
JPS5271904A JP14728975A JP14728975A JPS5271904A JP S5271904 A JPS5271904 A JP S5271904A JP 14728975 A JP14728975 A JP 14728975A JP 14728975 A JP14728975 A JP 14728975A JP S5271904 A JPS5271904 A JP S5271904A
Authority
JP
Japan
Prior art keywords
telephone set
calling system
set calling
outgoing
call
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
JP14728975A
Other languages
Japanese (ja)
Other versions
JPS5444563B2 (en
Inventor
Akio Oki
Isao Wakamatsu
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.)
Oki Electric Industry Co Ltd
Taiko Electric Works Ltd
Original Assignee
Oki Electric Industry Co Ltd
Taiko Electric Works 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 Oki Electric Industry Co Ltd, Taiko Electric Works Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP14728975A priority Critical patent/JPS5271904A/en
Publication of JPS5271904A publication Critical patent/JPS5271904A/en
Publication of JPS5444563B2 publication Critical patent/JPS5444563B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To secure the superiority and recognizability of the preceeding signal tone outgoing, by closing the outgoing circuit of the successive calling signal tone, when outgoings of signal tones of exchange call and internal call are overlapped.
JP14728975A 1975-12-12 1975-12-12 Telephone set calling system Granted JPS5271904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14728975A JPS5271904A (en) 1975-12-12 1975-12-12 Telephone set calling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14728975A JPS5271904A (en) 1975-12-12 1975-12-12 Telephone set calling system

Publications (2)

Publication Number Publication Date
JPS5271904A true JPS5271904A (en) 1977-06-15
JPS5444563B2 JPS5444563B2 (en) 1979-12-26

Family

ID=15426826

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14728975A Granted JPS5271904A (en) 1975-12-12 1975-12-12 Telephone set calling system

Country Status (1)

Country Link
JP (1) JPS5271904A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4510407Y1 (en) * 1969-07-28 1970-05-13
JPS503045U (en) * 1973-05-08 1975-01-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4510407Y1 (en) * 1969-07-28 1970-05-13
JPS503045U (en) * 1973-05-08 1975-01-13

Also Published As

Publication number Publication date
JPS5444563B2 (en) 1979-12-26

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