NL7514138A - Luidsprekend telefoonstelsel. - Google Patents

Luidsprekend telefoonstelsel.

Info

Publication number: NL7514138A
Authority: NL; Netherlands
Prior art keywords: telephone system; speaking telephone; speaking; telephone
Prior art date: 1974-12-12

Application number

NL7514138A

Other languages

English (en)

Original Assignee

Northern Electric Co

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.)

1974-12-12

Filing date

1975-12-04

Publication date

1976-06-15

1975-12-04 Application filed by Northern Electric Co filed Critical Northern Electric Co

1976-06-15 Publication of NL7514138A publication Critical patent/NL7514138A/nl

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
- H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Control Of Amplification And Gain Control (AREA)
Analogue/Digital Conversion (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Transceivers (AREA)

NL7514138A 1974-12-12 1975-12-04 Luidsprekend telefoonstelsel. NL7514138A (nl)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA215,876A CA996692A (en)	1974-12-12	1974-12-12	Digital control of a loudspeaking telephone system

Publications (1)

Publication Number	Publication Date
NL7514138A true NL7514138A (nl)	1976-06-15

Family

ID=4101835

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL7514138A NL7514138A (nl)	1974-12-12	1975-12-04	Luidsprekend telefoonstelsel.

Country Status (9)

Country	Link
JP (1)	JPS5183709A (nl)
CA (1)	CA996692A (nl)
DE (1)	DE2555552A1 (nl)
FR (1)	FR2294595A1 (nl)
GB (1)	GB1519607A (nl)
IT (1)	IT1050035B (nl)
NL (1)	NL7514138A (nl)
NO (1)	NO754207L (nl)
SE (1)	SE414856B (nl)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE2659028C3 (de) *	1976-12-27	1979-05-31	Dasy Inter S.A., Genf (Schweiz)	Schaltungsanordnung zum Verhindern von Rückkopplungen
DE2952122A1 (de) *	1979-12-22	1981-06-25	Deutsche Itt Industries Gmbh, 7800 Freiburg	Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete
JPS5797262A (en) *	1980-12-09	1982-06-16	Nippon Telegr & Teleph Corp <Ntt>	Loud speaker telephone set system
GB2137458B (en) *	1983-03-01	1986-11-19	Standard Telephones Cables Ltd	Digital handsfree telephone
GB2161047B (en) *	1984-06-28	1987-09-16	Stc Plc	Improvements in telephone instruments
GB2174578B (en) *	1985-05-04	1988-11-09	Stc Plc	Loud speaking telephone
GB2197166A (en) *	1986-11-07	1988-05-11	Storno As	Controlling gain in speech-controlled telephones
EP0271948A3 (en) *	1986-12-16	1989-05-03	Alcatel N.V.	Telecommunication circuit
DE4130045A1 (de) *	1991-09-10	1993-03-18	Standard Elektrik Lorenz Ag	Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes

1974
- 1974-12-12 CA CA215,876A patent/CA996692A/en not_active Expired
1975
- 1975-12-04 NL NL7514138A patent/NL7514138A/nl not_active Application Discontinuation
- 1975-12-05 GB GB50016/75A patent/GB1519607A/en not_active Expired
- 1975-12-09 IT IT30127/75A patent/IT1050035B/it active
- 1975-12-10 DE DE19752555552 patent/DE2555552A1/de not_active Withdrawn
- 1975-12-10 JP JP50146495A patent/JPS5183709A/ja active Pending
- 1975-12-11 NO NO754207A patent/NO754207L/no unknown
- 1975-12-11 SE SE7514036A patent/SE414856B/xx unknown
- 1975-12-12 FR FR7538184A patent/FR2294595A1/fr not_active Withdrawn

Also Published As

Publication number	Publication date
DE2555552A1 (de)	1976-06-16
FR2294595A1 (fr)	1976-07-09
NO754207L (nl)	1976-06-15
SE7514036L (sv)	1976-06-14
GB1519607A (en)	1978-08-02
IT1050035B (it)	1981-03-10
JPS5183709A (nl)	1976-07-22
CA996692A (en)	1976-09-07
SE414856B (sv)	1980-08-18

Similar Documents

Publication	Publication Date	Title
NL7413937A (nl)	1976-04-27	Microfoonstelsel.
NL7513921A (nl)	1976-06-01	Steunstelsel.
NL7407717A (nl)	1975-12-12	Radiotelefoniesysteem.
NL182926C (nl)	1988-06-01	Beeldtelefoonstelsel.
NL7509515A (nl)	1976-03-02	Stereofoon geluidstelsel.
NL169943C (nl)	1982-09-01	Communicatiestelsel.
NL7501712A (nl)	1975-08-18	Simultaanaansluitsysteem.
SE7507069L (sv)	1975-12-29	Snabbtelefonsystem.
NL7514138A (nl)	1976-06-15	Luidsprekend telefoonstelsel.
NL7513444A (nl)	1976-05-20	Communicatiesysteem.
NL7503734A (nl)	1975-10-01	Lijnkiezertelefoonstelsel.
NL7500501A (nl)	1975-07-28	Telefoonkiessysteem.
NL7508313A (nl)	1976-01-13	Personenoproep-stelsel.
NL7507209A (nl)	1976-02-25	Verrespreektoestel.
NL7415585A (nl)	1975-06-10	Telefoontoestel.
NL7510754A (nl)	1976-03-30	Bellendomeingenerators.
NL169809C (nl)	1982-08-16	Luidsprekend telefoontoestel.
DK138298B (da)	1978-08-07	Programlagerstyret telekommunikationsanlæg.
NL177547C (nl)	1985-10-01	Telefoonstelsel.
NO139841C (no)	1979-05-16	Telekommunikasjonssystem.
SE409537B (sv)	1979-08-20	Telefonapparatsystem
OA05195A (fr)	1981-02-28	Joncteur téléphonique.
NL7416853A (nl)	1975-08-11	Facsimilestelsel.
NL7410772A (nl)	1975-02-18	Telefoontoestel.
NL187043C (nl)	1991-05-01	Radio-telefoniestelsel.

Legal Events

Date	Code	Title	Description
1979-08-27	BV	The patent application has lapsed