NL7514138A - Luidsprekend telefoonstelsel. - Google Patents
Luidsprekend telefoonstelsel.Info
- Publication number
- NL7514138A NL7514138A NL7514138A NL7514138A NL7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A NL 7514138 A NL7514138 A NL 7514138A
- Authority
- NL
- Netherlands
- Prior art keywords
- telephone system
- speaking telephone
- speaking
- telephone
- Prior art date
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)
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)
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) | Microfoonstelsel. | |
NL7513921A (nl) | Steunstelsel. | |
NL7407717A (nl) | Radiotelefoniesysteem. | |
NL182926C (nl) | Beeldtelefoonstelsel. | |
NL7509515A (nl) | Stereofoon geluidstelsel. | |
NL169943C (nl) | Communicatiestelsel. | |
NL7501712A (nl) | Simultaanaansluitsysteem. | |
SE7507069L (sv) | Snabbtelefonsystem. | |
NL7514138A (nl) | Luidsprekend telefoonstelsel. | |
NL7513444A (nl) | Communicatiesysteem. | |
NL7503734A (nl) | Lijnkiezertelefoonstelsel. | |
NL7500501A (nl) | Telefoonkiessysteem. | |
NL7508313A (nl) | Personenoproep-stelsel. | |
NL7507209A (nl) | Verrespreektoestel. | |
NL7415585A (nl) | Telefoontoestel. | |
NL7510754A (nl) | Bellendomeingenerators. | |
NL169809C (nl) | Luidsprekend telefoontoestel. | |
DK138298B (da) | Programlagerstyret telekommunikationsanlæg. | |
NL177547C (nl) | Telefoonstelsel. | |
NO139841C (no) | Telekommunikasjonssystem. | |
SE409537B (sv) | Telefonapparatsystem | |
OA05195A (fr) | Joncteur téléphonique. | |
NL7416853A (nl) | Facsimilestelsel. | |
NL7410772A (nl) | Telefoontoestel. | |
NL187043C (nl) | Radio-telefoniestelsel. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
BV | The patent application has lapsed |