JPS5792990A - Electronic key telephone device - Google Patents

Electronic key telephone device

Info

Publication number
JPS5792990A
JPS5792990A JP16929280A JP16929280A JPS5792990A JP S5792990 A JPS5792990 A JP S5792990A JP 16929280 A JP16929280 A JP 16929280A JP 16929280 A JP16929280 A JP 16929280A JP S5792990 A JPS5792990 A JP S5792990A
Authority
JP
Japan
Prior art keywords
signal
main device
circuit
line
trunk line
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
JP16929280A
Other languages
Japanese (ja)
Other versions
JPH0136310B2 (en
Inventor
Teruyuki Kubo
Kazuyuki Yamamoto
Shinichi Mori
Naoki Azuma
Isao Kawashima
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16929280A priority Critical patent/JPS5792990A/en
Publication of JPS5792990A publication Critical patent/JPS5792990A/en
Publication of JPH0136310B2 publication Critical patent/JPH0136310B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To make a signal transmitting and receiving circuit, which is provided in a main device, signal, by communicating a control signal between the main device and a key telephone set in time division. CONSTITUTION:When the handset is hooked off and a trunk line CO-j is designated by a line button LK-i, the line button LK-i and a hook switch HS-i are operated, and a signal generated by these operation is inputted to a control circuit KCC-i. If the trunk line CO-j is idle, the circuit KCC-i outputs the request signal for call to a signal transmitted and receiving circuit KCLI-i to transmit the request signal to a main device ME. In the main device ME, this request signal is inputted to a control circuit MCC. Thus, a channel switch circuit SW is controlled to connect a service line SP-i from a key telephone set KT-i and the trunk line CO-j. Further, required control signals are used to realize functions of trunk line incoming, extension service, holding, transfer tripartite call, etc.
JP16929280A 1980-12-01 1980-12-01 Electronic key telephone device Granted JPS5792990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16929280A JPS5792990A (en) 1980-12-01 1980-12-01 Electronic key telephone device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16929280A JPS5792990A (en) 1980-12-01 1980-12-01 Electronic key telephone device

Publications (2)

Publication Number Publication Date
JPS5792990A true JPS5792990A (en) 1982-06-09
JPH0136310B2 JPH0136310B2 (en) 1989-07-31

Family

ID=15883806

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16929280A Granted JPS5792990A (en) 1980-12-01 1980-12-01 Electronic key telephone device

Country Status (1)

Country Link
JP (1) JPS5792990A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02189097A (en) * 1989-01-18 1990-07-25 Nippon Telegr & Teleph Corp <Ntt> Star bus mixture type key telephone system
JP2007109452A (en) * 2005-10-12 2007-04-26 D D K Ltd Round connector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248441A (en) * 1975-05-28 1977-04-18 Hitachi Ltd Memory system
JPS5410606A (en) * 1977-06-25 1979-01-26 Iwatsu Electric Co Ltd Synchronizing system for key telephone system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248441A (en) * 1975-05-28 1977-04-18 Hitachi Ltd Memory system
JPS5410606A (en) * 1977-06-25 1979-01-26 Iwatsu Electric Co Ltd Synchronizing system for key telephone system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02189097A (en) * 1989-01-18 1990-07-25 Nippon Telegr & Teleph Corp <Ntt> Star bus mixture type key telephone system
JP2007109452A (en) * 2005-10-12 2007-04-26 D D K Ltd Round connector

Also Published As

Publication number Publication date
JPH0136310B2 (en) 1989-07-31

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