DK74878A - Kredsloeb til en frihoejttalertelefon - Google Patents
Kredsloeb til en frihoejttalertelefonInfo
- Publication number
- DK74878A DK74878A DK74878A DK74878A DK74878A DK 74878 A DK74878 A DK 74878A DK 74878 A DK74878 A DK 74878A DK 74878 A DK74878 A DK 74878A DK 74878 A DK74878 A DK 74878A
- Authority
- DK
- Denmark
- Prior art keywords
- circuit
- speaker phone
- speaker
- phone
- 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
- H04M9/10—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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772751248 DE2751248C3 (de) | 1977-11-16 | 1977-11-16 | Schaltungsanordnung für ein Freisprechertelefon |
| DE19772751261 DE2751261C3 (de) | 1977-11-16 | 1977-11-16 | Schaltungsanordnung für ein Freisprechertelefon mit selbsttätiger Signalamplitudenbegrenzung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK74878A true DK74878A (da) | 1979-05-17 |
Family
ID=25773095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK74878A DK74878A (da) | 1977-11-16 | 1978-02-20 | Kredsloeb til en frihoejttalertelefon |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5472906A (da) |
| CH (1) | CH626485A5 (da) |
| DK (1) | DK74878A (da) |
| FI (1) | FI780555A (da) |
| FR (1) | FR2409645A2 (da) |
| GB (1) | GB1568329A (da) |
| IT (1) | IT1161440B (da) |
| LU (1) | LU79026A1 (da) |
| NL (1) | NL7801820A (da) |
| SE (1) | SE7801902L (da) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8317706D0 (en) * | 1983-06-29 | 1983-08-03 | Standard Telephones Cables Ltd | Telephone subsets |
| US4724540A (en) * | 1986-09-02 | 1988-02-09 | Motorola, Inc. | Speakerphone with fast idle mode |
| JPH06338934A (ja) * | 1993-05-25 | 1994-12-06 | Exar Corp | 事象駆動型制御回路を有するスピーカーホーン |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4051325A (en) * | 1975-01-31 | 1977-09-27 | Matsushita Electric Industrial Co., Ltd. | Speech intercommunication system |
| DE2638286C3 (de) * | 1976-08-25 | 1979-03-01 | Dasy Inter S.A., Genf (Schweiz) | Schaltungsanordnung für ein Freisprechertelefon |
-
1978
- 1978-02-08 LU LU79026A patent/LU79026A1/de unknown
- 1978-02-16 GB GB6251/78A patent/GB1568329A/en not_active Expired
- 1978-02-16 FR FR7804396A patent/FR2409645A2/fr active Pending
- 1978-02-17 NL NL7801820A patent/NL7801820A/xx not_active Application Discontinuation
- 1978-02-20 IT IT12485/78A patent/IT1161440B/it active
- 1978-02-20 FI FI780555A patent/FI780555A/fi unknown
- 1978-02-20 DK DK74878A patent/DK74878A/da not_active Application Discontinuation
- 1978-02-20 SE SE7801902A patent/SE7801902L/xx unknown
- 1978-02-20 CH CH182478A patent/CH626485A5/de not_active IP Right Cessation
- 1978-02-20 JP JP1840878A patent/JPS5472906A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| IT1161440B (it) | 1987-03-18 |
| FI780555A (fi) | 1979-05-17 |
| GB1568329A (en) | 1980-05-29 |
| NL7801820A (nl) | 1979-05-18 |
| FR2409645A2 (fr) | 1979-06-15 |
| CH626485A5 (en) | 1981-11-13 |
| LU79026A1 (de) | 1978-06-21 |
| IT7812485A0 (it) | 1978-02-20 |
| JPS5472906A (en) | 1979-06-11 |
| SE7801902L (sv) | 1979-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AHS | Application shelved for other reasons than non-payment |