JPS5183709A - - Google Patents
Info
- Publication number
- JPS5183709A JPS5183709A JP50146495A JP14649575A JPS5183709A JP S5183709 A JPS5183709 A JP S5183709A JP 50146495 A JP50146495 A JP 50146495A JP 14649575 A JP14649575 A JP 14649575A JP S5183709 A JPS5183709 A JP S5183709A
- Authority
- JP
- Japan
- 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.)
- Pending
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 |
|---|---|
| JPS5183709A true JPS5183709A (ja) | 1976-07-22 |
Family
ID=4101835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50146495A Pending JPS5183709A (ja) | 1974-12-12 | 1975-12-10 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5183709A (ja) |
| CA (1) | CA996692A (ja) |
| DE (1) | DE2555552A1 (ja) |
| FR (1) | FR2294595A1 (ja) |
| GB (1) | GB1519607A (ja) |
| IT (1) | IT1050035B (ja) |
| NL (1) | NL7514138A (ja) |
| NO (1) | NO754207L (ja) |
| SE (1) | SE414856B (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
Families Citing this family (8)
| 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 |
| 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/xx 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 SE SE7514036A patent/SE414856B/xx unknown
- 1975-12-11 NO NO754207A patent/NO754207L/no unknown
- 1975-12-12 FR FR7538184A patent/FR2294595A1/fr not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
| JPS6339179B2 (ja) * | 1980-12-09 | 1988-08-03 | Nippon Denshin Denwa Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1050035B (it) | 1981-03-10 |
| CA996692A (en) | 1976-09-07 |
| SE414856B (sv) | 1980-08-18 |
| NL7514138A (nl) | 1976-06-15 |
| NO754207L (ja) | 1976-06-15 |
| SE7514036L (sv) | 1976-06-14 |
| DE2555552A1 (de) | 1976-06-16 |
| GB1519607A (en) | 1978-08-02 |
| FR2294595A1 (fr) | 1976-07-09 |