JPS554154A - Key telephone set - Google Patents

Key telephone set

Info

Publication number
JPS554154A
JPS554154A JP7705378A JP7705378A JPS554154A JP S554154 A JPS554154 A JP S554154A JP 7705378 A JP7705378 A JP 7705378A JP 7705378 A JP7705378 A JP 7705378A JP S554154 A JPS554154 A JP S554154A
Authority
JP
Japan
Prior art keywords
incoming
contact
relay
circuits
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
JP7705378A
Other languages
Japanese (ja)
Inventor
Tatsuya Kato
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 JP7705378A priority Critical patent/JPS554154A/en
Publication of JPS554154A publication Critical patent/JPS554154A/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
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make it possible to answer automatically to an incoming circuit only by lifting the handset by supplying power to the incoming line by an incoming signal from the circuit and by providing several relays and contacts which connect and maintain the incoming circuit. CONSTITUTION:When incoming arrives at circuits 1L1 and 1L2, for example, among circuits 1L1, 1L2...nL1, and nL2, incoming relay R operates to supply power to incoming line RL via contact (r), and lifting the handset of the telephone set operates hook switches HS1 to HS3 while connection relay A1 is operated by busy relay B in process of operation. As a result, contact (a11) makes connections between circuits 1L1 and 1L2, and talking network N.W and contact (a12) connects the power supply to control line CL; while contact (a14) is broken, contact (a13) is made so as to supply relay A1 with the power continuously, so that answering to circuits 1L1 and 1L2 will be possible. For the originating operation, key (push button) LK1, for example, is depressed and switches HS1 to HS3 are only operated to operate relay A1, thereby allowing a call.
JP7705378A 1978-06-27 1978-06-27 Key telephone set Pending JPS554154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7705378A JPS554154A (en) 1978-06-27 1978-06-27 Key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7705378A JPS554154A (en) 1978-06-27 1978-06-27 Key telephone set

Publications (1)

Publication Number Publication Date
JPS554154A true JPS554154A (en) 1980-01-12

Family

ID=13623034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7705378A Pending JPS554154A (en) 1978-06-27 1978-06-27 Key telephone set

Country Status (1)

Country Link
JP (1) JPS554154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04261657A (en) * 1991-02-15 1992-09-17 Masaki Takahashi Turning motion apparatus for front arm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04261657A (en) * 1991-02-15 1992-09-17 Masaki Takahashi Turning motion apparatus for front arm

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