CA2000026A1 - Dialing confirmation tone output apparatus - Google Patents

Dialing confirmation tone output apparatus

Info

Publication number
CA2000026A1
CA2000026A1 CA2000026A CA2000026A CA2000026A1 CA 2000026 A1 CA2000026 A1 CA 2000026A1 CA 2000026 A CA2000026 A CA 2000026A CA 2000026 A CA2000026 A CA 2000026A CA 2000026 A1 CA2000026 A1 CA 2000026A1
Authority
CA
Canada
Prior art keywords
signal
confirmation tone
conversation
output apparatus
earphone
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
CA2000026A
Other languages
French (fr)
Other versions
CA2000026C (en
Inventor
Yukio Murata
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
Publication of CA2000026A1 publication Critical patent/CA2000026A1/en
Application granted granted Critical
Publication of CA2000026C publication Critical patent/CA2000026C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber

Abstract

ABSTRACT OF THE DISCLOSURE

A dialing confirmation tone (DCT) output apparatus including a variable attenuator connected between a DCT generator and an adder adding a received voice signal and a dialing confirmation tone. The attenuator attenuates the confirmation tone based on a control signal from a control circuit, The control circuit produces the control signal using a conversation condition signal and a receiving situation signal. The conversation condition signal is provided from a conversation condition detector and indicates whether conversation is taking place or not.
The receiving situation signal is provided from an earphone jack circuit and indicates whether or not an earphone is used for outputting the added signal. The attenuated confirmation tone can be heard while conversation takes place or the earphone is used.
CA002000026A 1988-09-30 1989-10-02 Dialing confirmation tone output apparatus Expired - Fee Related CA2000026C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP63246518A JP2658270B2 (en) 1988-09-30 1988-09-30 Dial confirmation sound output circuit
JP246518/1988 1988-09-30

Publications (2)

Publication Number Publication Date
CA2000026A1 true CA2000026A1 (en) 1990-03-31
CA2000026C CA2000026C (en) 1994-07-05

Family

ID=17149589

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002000026A Expired - Fee Related CA2000026C (en) 1988-09-30 1989-10-02 Dialing confirmation tone output apparatus

Country Status (6)

Country Link
US (1) US5128991A (en)
EP (1) EP0361496B1 (en)
JP (1) JP2658270B2 (en)
KR (1) KR930001158B1 (en)
CA (1) CA2000026C (en)
DE (1) DE68923238T2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100432209C (en) * 2001-07-30 2008-11-12 松下环境系统株式会社 Microorganism-collecting chip, microorganism-collecting kit, microorganism-collecting filter

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2560660Y2 (en) * 1991-03-29 1998-01-26 村田機械株式会社 Wireless telephone
GB2305334B (en) * 1995-09-12 1999-10-13 Sedley Bruce S Commentary systems
US20080304651A1 (en) * 2007-06-06 2008-12-11 Embarq Holdings Company, Llc System and method for overcoming dual tone multi frequency (DTMF) signal attenuation in analog and packet based networks
US8767930B2 (en) * 2007-06-06 2014-07-01 Centurylink Intellectual Property Llc System and method for amplifying attenuated DTMF signals in a packet based network
US8335308B2 (en) * 2007-10-31 2012-12-18 Centurylink Intellectual Property Llc Method, system, and apparatus for attenuating dual-tone multiple frequency confirmation tones in a telephone set

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE204375C (en) *
JPS5814114B2 (en) * 1979-10-04 1983-03-17 岩崎通信機株式会社 Dial confirmation sound circuit
US4406926A (en) * 1980-12-19 1983-09-27 International Telephone And Telegraph Corporation Telephone station circuit using digital tone generation
JPS609387B2 (en) * 1981-04-30 1985-03-09 富士通株式会社 Telephone dial signal transmission confirmation method
US4442322A (en) * 1982-07-07 1984-04-10 Gte Automatic Electric Inc. Electronic common switch having an improved receiver mating arrangement
US4496799A (en) * 1982-12-13 1985-01-29 International Telephone And Telegraph Corporation Handsfree telephone instrument using digital dial
US4508938A (en) * 1983-05-18 1985-04-02 Comdial Telephone Systems, Inc. Push-button dial for a telephone
JPS60105354A (en) * 1983-11-14 1985-06-10 Nec Corp Telephone-set circuit
JPS61103350A (en) * 1984-10-26 1986-05-21 Nec Corp Mf dial oscillation confirming tone circuit
JPS61224642A (en) * 1985-03-29 1986-10-06 Iwatsu Electric Co Ltd Dial signal transmission circuit
JPS61225953A (en) * 1985-03-29 1986-10-07 Nippon Telegr & Teleph Corp <Ntt> Telephone set
JPS61283261A (en) * 1985-06-10 1986-12-13 Mitsubishi Electric Corp Dial confirming tone circuit
US4669110A (en) * 1985-10-25 1987-05-26 Itt Corporation Call progress tone system
JPS6386945A (en) * 1986-09-30 1988-04-18 Toshiba Corp Generating device for key input confirming sound

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100432209C (en) * 2001-07-30 2008-11-12 松下环境系统株式会社 Microorganism-collecting chip, microorganism-collecting kit, microorganism-collecting filter

Also Published As

Publication number Publication date
CA2000026C (en) 1994-07-05
EP0361496A3 (en) 1991-11-21
EP0361496A2 (en) 1990-04-04
DE68923238T2 (en) 1996-01-04
DE68923238D1 (en) 1995-08-03
KR900005734A (en) 1990-04-14
JPH0294954A (en) 1990-04-05
JP2658270B2 (en) 1997-09-30
EP0361496B1 (en) 1995-06-28
US5128991A (en) 1992-07-07
KR930001158B1 (en) 1993-02-19

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed