JPS56161753A - Key telephone set - Google Patents

Key telephone set

Info

Publication number
JPS56161753A
JPS56161753A JP6408480A JP6408480A JPS56161753A JP S56161753 A JPS56161753 A JP S56161753A JP 6408480 A JP6408480 A JP 6408480A JP 6408480 A JP6408480 A JP 6408480A JP S56161753 A JPS56161753 A JP S56161753A
Authority
JP
Japan
Prior art keywords
channel
telephone set
contact
route
transmitted
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
JP6408480A
Other languages
Japanese (ja)
Other versions
JPH0131359B2 (en
Inventor
Hirozo Shintani
Takeo Oba
Eiji Morikami
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP6408480A priority Critical patent/JPS56161753A/en
Publication of JPS56161753A publication Critical patent/JPS56161753A/en
Publication of JPH0131359B2 publication Critical patent/JPH0131359B2/ja
Granted 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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To make effective use of lines and to increase the economy of the system, by providing a channel forming means which forms channels other than extension channels via them, with each of a plurality of key telephone sets. CONSTITUTION:An extension call signal when no extension channel is in use, is transmitted to a signal transmission line 5 with the route of channel 57 contact 58-1 LPF61 at the telephone set 3 of caller side and transmitted with the route of LPF61 contact 58-1 channel 57 at the telephone set 3 at called party side. In case of the extension call, if one extension call is made, the extension call signal is transmitted to a trunk line channel 4 with the route of channel 57 contact 58-2 dotted line side of contact 53-1 LPF64 at the telephone set 3 at caller side and transmitted with the route of LPF64 dotted line side of 53-1 contact 58-2 channel 57 at the telephone set 3 of called party side.
JP6408480A 1980-05-16 1980-05-16 Key telephone set Granted JPS56161753A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6408480A JPS56161753A (en) 1980-05-16 1980-05-16 Key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6408480A JPS56161753A (en) 1980-05-16 1980-05-16 Key telephone set

Publications (2)

Publication Number Publication Date
JPS56161753A true JPS56161753A (en) 1981-12-12
JPH0131359B2 JPH0131359B2 (en) 1989-06-26

Family

ID=13247858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6408480A Granted JPS56161753A (en) 1980-05-16 1980-05-16 Key telephone set

Country Status (1)

Country Link
JP (1) JPS56161753A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6422193A (en) * 1987-07-17 1989-01-25 Iwatsu Electric Co Ltd Telephone system
JPH0670962A (en) * 1992-06-29 1994-03-15 Masao Takuwa Drying device for removing moisture of animal from mat by laying mat under animal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6422193A (en) * 1987-07-17 1989-01-25 Iwatsu Electric Co Ltd Telephone system
JPH0670962A (en) * 1992-06-29 1994-03-15 Masao Takuwa Drying device for removing moisture of animal from mat by laying mat under animal

Also Published As

Publication number Publication date
JPH0131359B2 (en) 1989-06-26

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