JPS55140352A - Speaker telephone set connecting system - Google Patents

Speaker telephone set connecting system

Info

Publication number
JPS55140352A
JPS55140352A JP4867279A JP4867279A JPS55140352A JP S55140352 A JPS55140352 A JP S55140352A JP 4867279 A JP4867279 A JP 4867279A JP 4867279 A JP4867279 A JP 4867279A JP S55140352 A JPS55140352 A JP S55140352A
Authority
JP
Japan
Prior art keywords
extension
control
speaker
telephone set
operation state
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
JP4867279A
Other languages
Japanese (ja)
Other versions
JPS5927555B2 (en
Inventor
Makoto Yoshimoto
Masato Araki
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 JP4867279A priority Critical patent/JPS5927555B2/en
Publication of JPS55140352A publication Critical patent/JPS55140352A/en
Publication of JPS5927555B2 publication Critical patent/JPS5927555B2/en
Expired 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

Abstract

PURPOSE:To make office hand-free service, extension hand-free service and response, speaker receiving and so on possible by providing a prescribed control function in the speaker telephone set for office service. CONSTITUTION:Control means 19 and 23 which become the operation state due to the control of an operation switch and have the operation state released by hook-up information from one of plural button telephone sets and close the channel of the main wire to make speaker telephone set LP operated are provided in LP, and control means 21 is provided which is started by the extension call signal when the extension lamp current is flowed from one of button telephone sets to control line 3, and closes the extension channel in the operation state to make LP operated. Thus, extension channel 5 and plural control lines 3 are used to connect selectively button telephone sets to the main wire.
JP4867279A 1979-04-20 1979-04-20 Loudspeaker telephone connection method Expired JPS5927555B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4867279A JPS5927555B2 (en) 1979-04-20 1979-04-20 Loudspeaker telephone connection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4867279A JPS5927555B2 (en) 1979-04-20 1979-04-20 Loudspeaker telephone connection method

Publications (2)

Publication Number Publication Date
JPS55140352A true JPS55140352A (en) 1980-11-01
JPS5927555B2 JPS5927555B2 (en) 1984-07-06

Family

ID=12809807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4867279A Expired JPS5927555B2 (en) 1979-04-20 1979-04-20 Loudspeaker telephone connection method

Country Status (1)

Country Link
JP (1) JPS5927555B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862957A (en) * 1981-10-09 1983-04-14 Nippon Telegr & Teleph Corp <Ntt> Extension hand free response circuit
JPS59158191A (en) * 1983-02-26 1984-09-07 Tamura Electric Works Ltd Key telephone set
JPH0377575U (en) * 1990-10-25 1991-08-05

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862957A (en) * 1981-10-09 1983-04-14 Nippon Telegr & Teleph Corp <Ntt> Extension hand free response circuit
JPS59158191A (en) * 1983-02-26 1984-09-07 Tamura Electric Works Ltd Key telephone set
JPH0377575U (en) * 1990-10-25 1991-08-05
JPH0450712Y2 (en) * 1990-10-25 1992-11-30

Also Published As

Publication number Publication date
JPS5927555B2 (en) 1984-07-06

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