CA2114039A1 - Pushbutton Telephone System - Google Patents

Pushbutton Telephone System

Info

Publication number
CA2114039A1
CA2114039A1 CA2114039A CA2114039A CA2114039A1 CA 2114039 A1 CA2114039 A1 CA 2114039A1 CA 2114039 A CA2114039 A CA 2114039A CA 2114039 A CA2114039 A CA 2114039A CA 2114039 A1 CA2114039 A1 CA 2114039A1
Authority
CA
Canada
Prior art keywords
telephone
pushbutton
line
cpu
connection
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
CA2114039A
Other languages
French (fr)
Other versions
CA2114039C (en
Inventor
Hiroaki Hayashi
Takashi Aoki
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Publication of CA2114039A1 publication Critical patent/CA2114039A1/en
Application granted granted Critical
Publication of CA2114039C publication Critical patent/CA2114039C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Abstract

A telephone connection is established between a pushbutton telephone set and one of telephone lines through a pushbutton telephone set unit, a speech highway, and a telephone line unit. When one of line and extension keys of the pushbutton telephone set is pressed by the user during the telephone connection, a CPU in a control unit determines whether the telephone connection is being made based on the period of time that has elapsed after the pushbutton telephone set has captured the telephone line. If the telephone connection is being made as determined by the CPU, then the CPU controls a time switch circuit according to hold function data stored in a RAM to connect the telephone line unit to a hold tone generator through the speech highway, thus holding the telephone connection. Thereafter, the CPU captures a telephone line corresponding to the depressed one of the line and extension keys.
CA002114039A 1993-01-25 1994-01-24 Pushbutton telephone system Expired - Fee Related CA2114039C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5-009923 1993-01-25
JP5009923A JPH06225354A (en) 1993-01-25 1993-01-25 Key telephone system

Publications (2)

Publication Number Publication Date
CA2114039A1 true CA2114039A1 (en) 1994-07-26
CA2114039C CA2114039C (en) 1997-12-16

Family

ID=11733614

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002114039A Expired - Fee Related CA2114039C (en) 1993-01-25 1994-01-24 Pushbutton telephone system

Country Status (3)

Country Link
US (1) US5483584A (en)
JP (1) JPH06225354A (en)
CA (1) CA2114039C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3352262B2 (en) * 1994-12-13 2002-12-03 キヤノン株式会社 Information communication processor
JP3046229B2 (en) * 1995-10-04 2000-05-29 キヤノン株式会社 Telephone equipment
GB2323250B (en) * 1997-03-13 1999-02-10 Toshiba Kk Key telephone system
JP3638229B2 (en) * 1999-07-02 2005-04-13 ペンタックス株式会社 Interchangeable camera back SLR camera
USD793988S1 (en) * 2016-01-12 2017-08-08 Rebecca Galvan Telephone with cord

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032729A (en) * 1973-12-21 1977-06-28 Rockwell International Corporation Low profile keyboard switch having panel hinged actuators and cantilevered beam snap acting contacts
US4096358A (en) * 1976-05-24 1978-06-20 Bell Telephone Laboratories, Incorporated Key telephone system signal priority arrangement
US4280022A (en) * 1978-02-07 1981-07-21 Iwasaki Tsushinki Kabushiki Kaisha Key telephone systems
US4607144A (en) * 1984-01-20 1986-08-19 Telecomputer Corporation, Ltd. Apparatus for enhancing the use of electromechanical key telephone systems

Also Published As

Publication number Publication date
CA2114039C (en) 1997-12-16
JPH06225354A (en) 1994-08-12
US5483584A (en) 1996-01-09

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed