JPS647795A - Communication control system - Google Patents

Communication control system

Info

Publication number
JPS647795A
JPS647795A JP16099887A JP16099887A JPS647795A JP S647795 A JPS647795 A JP S647795A JP 16099887 A JP16099887 A JP 16099887A JP 16099887 A JP16099887 A JP 16099887A JP S647795 A JPS647795 A JP S647795A
Authority
JP
Japan
Prior art keywords
controller
telephone set
terminal
call
incoming 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.)
Pending
Application number
JP16099887A
Other languages
Japanese (ja)
Inventor
Kuniaki Otsuka
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP16099887A priority Critical patent/JPS647795A/en
Publication of JPS647795A publication Critical patent/JPS647795A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To enable calling a desired terminal without hindrance from any other terminals by receiving a control signal generated in accordance with the depressing of an operational button on a connected communication terminal equipment by means of a reception means, and limiting an incoming call to a first terminal only to a second terminal by the reception means in which the control signal designates the first and the second terminals. CONSTITUTION:A central controller 2 supervises at all time a call request from respective extension interface 6, 7, 8, the time-out of an incoming call regulating timer 25, an input from a specific extension incoming call reserve button, etc. When a handset 18 connected to the controller 2 is hooked off, a corresponding interface detects this hooking-off and informs this to the controller 2 as the issuance of a call request. When subsequently a push-button 24 of an extension telephone set is depressed, a signal discrimination part 26 discriminates the signal so that the controller 2 recognizes a corresponding input telephone number and specifies an interface to be connected. Thereafter, status information is read out from a memory 4, and a call is enabled between the caller's telephone set and the called telephone set.
JP16099887A 1987-06-30 1987-06-30 Communication control system Pending JPS647795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16099887A JPS647795A (en) 1987-06-30 1987-06-30 Communication control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16099887A JPS647795A (en) 1987-06-30 1987-06-30 Communication control system

Publications (1)

Publication Number Publication Date
JPS647795A true JPS647795A (en) 1989-01-11

Family

ID=15726628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16099887A Pending JPS647795A (en) 1987-06-30 1987-06-30 Communication control system

Country Status (1)

Country Link
JP (1) JPS647795A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386102A (en) * 1977-01-07 1978-07-29 Nippon Telegr & Teleph Corp <Ntt> Selective exchange system
JPS5552666A (en) * 1978-10-12 1980-04-17 Nippon Telegr & Teleph Corp <Ntt> Incoming regulation system
JPS6242657A (en) * 1985-08-19 1987-02-24 Oki Electric Ind Co Ltd Automatic releasing system for absent transferring service
JPS6276348A (en) * 1985-09-27 1987-04-08 Nec Corp Incoming regulation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386102A (en) * 1977-01-07 1978-07-29 Nippon Telegr & Teleph Corp <Ntt> Selective exchange system
JPS5552666A (en) * 1978-10-12 1980-04-17 Nippon Telegr & Teleph Corp <Ntt> Incoming regulation system
JPS6242657A (en) * 1985-08-19 1987-02-24 Oki Electric Ind Co Ltd Automatic releasing system for absent transferring service
JPS6276348A (en) * 1985-09-27 1987-04-08 Nec Corp Incoming regulation system

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