JPS554153A - Key telephone set - Google Patents

Key telephone set

Info

Publication number
JPS554153A
JPS554153A JP7705278A JP7705278A JPS554153A JP S554153 A JPS554153 A JP S554153A JP 7705278 A JP7705278 A JP 7705278A JP 7705278 A JP7705278 A JP 7705278A JP S554153 A JPS554153 A JP S554153A
Authority
JP
Japan
Prior art keywords
handset
relay
answering
incoming
telephone set
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
JP7705278A
Other languages
Japanese (ja)
Inventor
Akira Okamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP7705278A priority Critical patent/JPS554153A/en
Publication of JPS554153A publication Critical patent/JPS554153A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

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

Abstract

PURPOSE:To make it possible to answer to an incoming circuit automatically only by lifting a handset without depressing a mainwire button, by providing an answering speech line and answering control line connecting to a main unit and telephone set. CONSTITUTION:When incoming arrives at the 1st circuits 1L1 and 1L2, for example, among several circuits 1L1, 1L2...nL1, and nL2, incoming detection relay R1 and connection relay A1 operate in sequence, and lifting the handset of the telephone set by an operator turns ON hook swithc HS, operating incoming circuit answer relay B connecting to the power supply via answering control line ANS; as a result, relay A1 is held and a channel is also formed by way of answering speech lines AL1 and AL2, and talking network NET. For the purpose of on-hook operation, hanging up the handset resets switch HS and all relays, thereby ending the call. For a normal call, the call becomes possible by depressing key (push button) LK1 with the handset off the hook.
JP7705278A 1978-06-27 1978-06-27 Key telephone set Pending JPS554153A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7705278A JPS554153A (en) 1978-06-27 1978-06-27 Key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7705278A JPS554153A (en) 1978-06-27 1978-06-27 Key telephone set

Publications (1)

Publication Number Publication Date
JPS554153A true JPS554153A (en) 1980-01-12

Family

ID=13623004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7705278A Pending JPS554153A (en) 1978-06-27 1978-06-27 Key telephone set

Country Status (1)

Country Link
JP (1) JPS554153A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01218291A (en) * 1988-02-26 1989-08-31 Nippon Telegr & Teleph Corp <Ntt> Automatic line selector in incoming signal monitor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01218291A (en) * 1988-02-26 1989-08-31 Nippon Telegr & Teleph Corp <Ntt> Automatic line selector in incoming signal monitor

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