GB2110905B - Handsfree telephone facility - Google Patents

Handsfree telephone facility

Info

Publication number: GB2110905B
Authority: GB; United Kingdom
Prior art keywords: telephone facility; handsfree telephone; handsfree; facility; telephone
Prior art date: 1981-12-03
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.): Expired

Application number

GB08230509A

Other versions

GB2110905A (en

Inventor

Frank Bahr

Werner Hubner

Hans-Gunther Luhmann

Gunter Schulz

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.)

Deutsche Telephonwerke und Kabelindustrie AG

Original Assignee

Deutsche Telephonwerke und Kabelindustrie AG

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.)

1981-12-03

Filing date

1982-10-26

Publication date

1985-11-13

1982-10-26 Application filed by Deutsche Telephonwerke und Kabelindustrie AG filed Critical Deutsche Telephonwerke und Kabelindustrie AG

1983-06-22 Publication of GB2110905A publication Critical patent/GB2110905A/en

1985-11-13 Application granted granted Critical

1985-11-13 Publication of GB2110905B publication Critical patent/GB2110905B/en

Status 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
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
Circuit For Audible Band Transducer (AREA)
Telephone Function (AREA)
Amplifiers (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Telephone Set Structure (AREA)
Mobile Radio Communication Systems (AREA)

GB08230509A 1981-12-03 1982-10-26 Handsfree telephone facility Expired GB2110905B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19813148305 DE3148305A1 (en)	1981-12-03	1981-12-03	CIRCUIT ARRANGEMENT FOR A HANDS-FREE UNIT

Publications (2)

Publication Number	Publication Date
GB2110905A GB2110905A (en)	1983-06-22
GB2110905B true GB2110905B (en)	1985-11-13

Family

ID=6148050

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB08230509A Expired GB2110905B (en)	1981-12-03	1982-10-26	Handsfree telephone facility

Country Status (10)

Country	Link
BE (1)	BE894144A (en)
DE (1)	DE3148305A1 (en)
DK (1)	DK534682A (en)
FR (1)	FR2517911B1 (en)
GB (1)	GB2110905B (en)
GR (1)	GR77765B (en)
IE (1)	IE53672B1 (en)
IT (1)	IT1154586B (en)
LU (1)	LU84322A1 (en)
NL (1)	NL8203010A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3211184C2 (en) *	1981-03-31	1985-12-12	A. Grothe & Söhne KG, 5000 Köln	Circuit arrangement for a handsfree telephone
DE3301498A1 (en) *	1983-01-14	1984-07-19	Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin	Subscriber telephone station device for telephone switching systems
DE3509658A1 (en) *	1985-03-18	1986-09-18	Drägerwerk AG, 2400 Lübeck	Communication unit for a microtelephone set
FR2611408B1 (en) *	1987-02-27	1989-05-26	Radiotechnique Compelec	GAIN CONTROL CIRCUIT OF A LOUDSPEAKER AMPLIFIER FOR THE SUPPRESSION OF THE LARSEN EFFECT
WO1990004897A1 (en) *	1988-10-26	1990-05-03	Reptec Hb	Telephone plant
DE4012175C2 (en) *	1990-04-14	1995-04-13	Telefunken Microelectron	Speakerphone

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2120558A5 (en) *	1971-01-08	1972-08-18	Brault Andre
SE365375B (en) *	1972-12-18	1974-03-18	Ericsson Telefon Ab L M
DE2439740C3 (en) *	1974-08-19	1978-08-24	Siemens Ag, 1000 Berlin Und 8000 Muenchen	Circuit arrangement for voice-controlled hands-free devices with different attenuation levels depending on the voice voltages for each voice channel and each direction of speech
DE2710816C3 (en) *	1977-03-11	1980-01-10	Siemens Ag, 1000 Berlin Und 8000 Muenchen	Circuit arrangement for a loudspeaker station
DE2714132C3 (en) *	1977-03-30	1980-02-07	Siemens Ag, 1000 Berlin Und 8000 Muenchen	Circuit arrangement for a voice-controlled loudspeaker device

1981
- 1981-12-03 DE DE19813148305 patent/DE3148305A1/en active Granted
1982
- 1982-07-27 NL NL8203010A patent/NL8203010A/en not_active Application Discontinuation
- 1982-08-06 LU LU84322A patent/LU84322A1/en unknown
- 1982-08-19 BE BE0/208839A patent/BE894144A/en not_active IP Right Cessation
- 1982-10-26 GB GB08230509A patent/GB2110905B/en not_active Expired
- 1982-10-27 IE IE2583/82A patent/IE53672B1/en unknown
- 1982-11-24 IT IT24414/82A patent/IT1154586B/en active
- 1982-12-01 GR GR69943A patent/GR77765B/el unknown
- 1982-12-02 DK DK534682A patent/DK534682A/en not_active Application Discontinuation
- 1982-12-02 FR FR8220226A patent/FR2517911B1/en not_active Expired

Also Published As

Publication number	Publication date
IE822583L (en)	1983-06-03
GR77765B (en)	1984-09-25
LU84322A1 (en)	1983-02-28
IT8224414A1 (en)	1984-05-24
IE53672B1 (en)	1989-01-04
DK534682A (en)	1983-06-04
GB2110905A (en)	1983-06-22
IT1154586B (en)	1987-01-21
FR2517911A1 (en)	1983-06-10
DE3148305C2 (en)	1988-02-04
NL8203010A (en)	1983-07-01
DE3148305A1 (en)	1983-06-09
IT8224414A0 (en)	1982-11-24
BE894144A (en)	1982-12-16
FR2517911B1 (en)	1986-04-18

Legal Events

Date	Code	Title	Description
1990-06-20	PCNP	Patent ceased through non-payment of renewal fee

Publication	Publication Date	Title
GB2111800B (en)	1985-08-07	Telephone sets
DE3262435D1 (en)	1985-03-28	Cordless telephone set
GB2102249B (en)	1985-03-13	Telephone line circuit
GB2096434B (en)	1985-04-03	Loudspeaking telephone system
GB2122454B (en)	1985-11-20	Loudspeaking telephone
DE3274509D1 (en)	1987-01-15	Telephone line circuit
IL68359A0 (en)	1983-07-31	Telephone set
ZA826941B (en)	1984-03-28	Telephone apparatus
GB2124454B (en)	1986-07-30	Cordless telephone system
GB2100096B (en)	1985-10-02	Telephone apparatus
GB2110905B (en)	1985-11-13	Handsfree telephone facility
DE3264570D1 (en)	1985-08-08	Telephone set
GB2066023B (en)	1983-11-09	Telephone line interface
GB2110055B (en)	1985-07-10	Cordless telephone systems
GB2137049B (en)	1986-05-14	Handsfree telephone
AU8088782A (en)	1982-10-19	Cordless telephone system
GB2073542B (en)	1983-08-24	Telephone handset
GB2107153B (en)	1985-07-31	Telephone autodiallers
GB2086185B (en)	1984-05-02	Telephone re-dial facility
GB2105946B (en)	1984-12-19	Telephone
GB2113043B (en)	1985-12-11	Telephone dialling system
CA48920S (en)	1981-11-09	Telephone handset
GB2101451B (en)	1985-09-11	Telephone instrument
GB8305573D0 (en)	1983-03-30	Handsfree telephone system
PL234461A1 (en)	1983-07-04	Telephone set