JPS6454893A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
JPS6454893A
JPS6454893A JP21183987A JP21183987A JPS6454893A JP S6454893 A JPS6454893 A JP S6454893A JP 21183987 A JP21183987 A JP 21183987A JP 21183987 A JP21183987 A JP 21183987A JP S6454893 A JPS6454893 A JP S6454893A
Authority
JP
Japan
Prior art keywords
additional device
key telephone
tone
dialed
prescribed number
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
JP21183987A
Other languages
Japanese (ja)
Inventor
Kumiko Yoshino
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
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 filed Critical NEC Corp
Priority to JP21183987A priority Critical patent/JPS6454893A/en
Publication of JPS6454893A publication Critical patent/JPS6454893A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To make a key telephone set having dialed a prescribed number access an additional device by making the additional device output a prescribed MF tone by driving an MF tone circuit, and controlling the additional device so as to come into a state that the additional device can be used from the key telephone set. CONSTITUTION:When the prescribed number is dialed from the offhooked key telephone sets 21-2m in an extension selection state, a control part 7 drives the MF tone circuit 5 and sends the prescribed MF tone 9 to the additional device 6 corresponding to the dialed prescribed number, and controls the additional device 6 and makes the key telephone sets 21-2m having dialed the prescribed number able to access the additional device 6. Thus, the key telephone sets 21-2m, even not in a line wire selection state, is made able to use the additional device 6, connected to a main device 1 and controlled by the MF tone 9, and the function of the key telephone sets 21-2m is enhanced.
JP21183987A 1987-08-25 1987-08-25 Key telephone system Pending JPS6454893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21183987A JPS6454893A (en) 1987-08-25 1987-08-25 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21183987A JPS6454893A (en) 1987-08-25 1987-08-25 Key telephone system

Publications (1)

Publication Number Publication Date
JPS6454893A true JPS6454893A (en) 1989-03-02

Family

ID=16612439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21183987A Pending JPS6454893A (en) 1987-08-25 1987-08-25 Key telephone system

Country Status (1)

Country Link
JP (1) JPS6454893A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160364A (en) * 1982-12-30 1984-09-11 ウオング・ラボラトリ−ズ・インコ−ポレ−テツド Method and device for automatically responding to telephone calling
JPS61113393A (en) * 1984-11-08 1986-05-31 Tamura Electric Works Ltd Automatic answering telephone set control system for button telephone equipment
JPS61114690A (en) * 1984-11-08 1986-06-02 Matsushita Electric Ind Co Ltd Button telephone device
JPS6316746A (en) * 1986-07-09 1988-01-23 Iwatsu Electric Co Ltd Telephone exchange

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59160364A (en) * 1982-12-30 1984-09-11 ウオング・ラボラトリ−ズ・インコ−ポレ−テツド Method and device for automatically responding to telephone calling
JPS61113393A (en) * 1984-11-08 1986-05-31 Tamura Electric Works Ltd Automatic answering telephone set control system for button telephone equipment
JPS61114690A (en) * 1984-11-08 1986-06-02 Matsushita Electric Ind Co Ltd Button telephone device
JPS6316746A (en) * 1986-07-09 1988-01-23 Iwatsu Electric Co Ltd Telephone exchange

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