DK9278A - Elektronisk kobling til et telefonapparat - Google Patents
Elektronisk kobling til et telefonapparatInfo
- Publication number
- DK9278A DK9278A DK9278A DK9278A DK9278A DK 9278 A DK9278 A DK 9278A DK 9278 A DK9278 A DK 9278A DK 9278 A DK9278 A DK 9278A DK 9278 A DK9278 A DK 9278A
- Authority
- DK
- Denmark
- Prior art keywords
- telephone device
- electronic connection
- electronic
- connection
- telephone
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Developing Agents For Electrophotography (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA269,418A CA1056970A (en) | 1977-01-10 | 1977-01-10 | Electronic network for telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
DK9278A true DK9278A (da) | 1978-07-11 |
Family
ID=4107699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK9278A DK9278A (da) | 1977-01-10 | 1978-01-09 | Elektronisk kobling til et telefonapparat |
Country Status (13)
Country | Link |
---|---|
US (1) | US4133983A (da) |
JP (1) | JPS5387604A (da) |
CA (1) | CA1056970A (da) |
DE (1) | DE2800875A1 (da) |
DK (1) | DK9278A (da) |
ES (1) | ES465856A1 (da) |
FI (1) | FI773962A (da) |
FR (1) | FR2377125A1 (da) |
GB (1) | GB1543300A (da) |
IT (1) | IT1089420B (da) |
NL (1) | NL7714174A (da) |
NO (1) | NO780077L (da) |
SE (1) | SE414444B (da) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2906084C2 (de) * | 1979-02-15 | 1981-10-08 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung zur Übertragung von sprachfrequenten Signalen in Fernsprechanlagen |
US4354060A (en) * | 1979-07-26 | 1982-10-12 | Stromberg-Carlson Corporation | Electronic telephone |
DE2946306C2 (de) * | 1979-11-16 | 1987-02-26 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verstärkerschaltung mit vorgebbarem Wechselstrominnenwiderstand |
US4332984A (en) * | 1979-12-13 | 1982-06-01 | Bell Telephone Laboratories, Incorporated | Active speech network circuit for a telephone set |
FR2487611B1 (fr) * | 1980-07-22 | 1987-10-30 | Telephonie Ind Commerciale | Circuit d'interface de clavier a frequences vocales |
IL63653A (en) * | 1980-08-29 | 1984-05-31 | Western Electric Co | Line powered transformer-less loudspeaking telephone |
US4488006A (en) * | 1982-07-01 | 1984-12-11 | At&T Bell Laboratories | Apparatus for controlling the application of telephone line power in a telephone set |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3462560A (en) * | 1966-04-06 | 1969-08-19 | Bell Telephone Labor Inc | Subscriber telephone circuit with resistance hybrid sidetone balancing network |
BE759917A (fr) * | 1969-12-08 | 1971-05-17 | Western Electric Co | Reseau a frequence acoustique |
US3691311A (en) * | 1970-12-10 | 1972-09-12 | Pacific Plantronics Inc | Telephone user set |
GB1406663A (en) * | 1972-08-22 | 1975-09-17 | Standard Telephones Cables Ltd | Telphone subset circuits |
IT1024530B (it) * | 1974-03-21 | 1978-07-20 | Sits Soc It Telecom Siemens | Circuito telefonico amplificato senza trasformatore |
US3899646A (en) * | 1974-05-28 | 1975-08-12 | Bell Telephone Labor Inc | Telephone set speech network |
SE7415220L (sv) * | 1974-12-04 | 1976-05-17 | Ericsson Telefon Ab L M | Integrerad forsterkare |
US3963876A (en) * | 1975-06-30 | 1976-06-15 | Bell Telephone Laboratories, Incorporated | Amplifier circuit for increasing transmit and receive levels in a telephone hybrid network |
US4071713A (en) * | 1976-12-27 | 1978-01-31 | Northern Telecom Limited | Telephone speech network |
-
1977
- 1977-01-10 CA CA269,418A patent/CA1056970A/en not_active Expired
- 1977-12-15 GB GB52282/77A patent/GB1543300A/en not_active Expired
- 1977-12-21 NL NL7714174A patent/NL7714174A/xx not_active Application Discontinuation
- 1977-12-28 IT IT31362/77A patent/IT1089420B/it active
- 1977-12-28 FR FR7739532A patent/FR2377125A1/fr not_active Withdrawn
- 1977-12-29 FI FI773962A patent/FI773962A/fi not_active Application Discontinuation
-
1978
- 1978-01-06 US US05/867,438 patent/US4133983A/en not_active Expired - Lifetime
- 1978-01-09 JP JP60878A patent/JPS5387604A/ja active Pending
- 1978-01-09 DK DK9278A patent/DK9278A/da unknown
- 1978-01-09 SE SE7800212A patent/SE414444B/sv unknown
- 1978-01-09 NO NO780077A patent/NO780077L/no unknown
- 1978-01-10 DE DE19782800875 patent/DE2800875A1/de not_active Withdrawn
- 1978-01-10 ES ES465856A patent/ES465856A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT1089420B (it) | 1985-06-18 |
NL7714174A (nl) | 1978-07-12 |
FI773962A (fi) | 1978-07-11 |
ES465856A1 (es) | 1978-10-01 |
JPS5387604A (en) | 1978-08-02 |
FR2377125A1 (fr) | 1978-08-04 |
CA1056970A (en) | 1979-06-19 |
SE7800212L (sv) | 1978-07-11 |
NO780077L (no) | 1978-07-11 |
US4133983A (en) | 1979-01-09 |
DE2800875A1 (de) | 1978-07-13 |
GB1543300A (en) | 1979-04-04 |
SE414444B (sv) | 1980-07-28 |
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