BE565494A - - Google Patents
Info
- Publication number
- BE565494A BE565494A BE565494DA BE565494A BE 565494 A BE565494 A BE 565494A BE 565494D A BE565494D A BE 565494DA BE 565494 A BE565494 A BE 565494A
- Authority
- BE
- Belgium
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
-
- 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
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE361034X | 1957-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE565494A true BE565494A (da) | 1900-01-01 |
Family
ID=20308922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE565494D BE565494A (da) | 1957-11-26 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3027429A (da) |
| BE (1) | BE565494A (da) |
| CH (1) | CH361034A (da) |
| DE (1) | DE1160897B (da) |
| FR (1) | FR1191363A (da) |
| GB (1) | GB842274A (da) |
| NL (1) | NL225471A (da) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL267461A (da) * | 1960-10-04 | 1900-01-01 | ||
| DE1211271B (de) * | 1961-06-08 | 1966-02-24 | Ericsson Telefon Ab L M | Schaltungsanordnung fuer eine sprachgesteuerte Gegen- oder Wechselsprechanlage mit Freisprechbetrieb |
| SE301502B (da) * | 1962-07-24 | 1968-06-10 | Gylling & Co Ab | |
| GB1011962A (en) * | 1963-05-14 | 1965-12-01 | Northern Electric Co | Improvements in or relating to electrical control circuits |
| GB1029163A (en) * | 1964-05-29 | 1966-05-11 | Standard Telephones Cables Ltd | Improvements in or relating to telephone sets |
| DE1275164B (de) * | 1964-07-24 | 1968-08-14 | Siemens Ag | Verkopplungseinrichtung mit Sprachsteuerung |
| US3621142A (en) * | 1969-06-05 | 1971-11-16 | Bunting Sterisystems Inc | Single wire dc communicating means |
| US3600525A (en) * | 1970-07-31 | 1971-08-17 | Jim C Garrett | Test set for strowger switches |
| IT1024530B (it) * | 1974-03-21 | 1978-07-20 | Sits Soc It Telecom Siemens | Circuito telefonico amplificato senza trasformatore |
| NO134477C (da) * | 1974-10-29 | 1976-10-13 | Manus Max | |
| US4051325A (en) * | 1975-01-31 | 1977-09-27 | Matsushita Electric Industrial Co., Ltd. | Speech intercommunication system |
| GB1508750A (en) * | 1975-05-28 | 1978-04-26 | Tani Denki Kogyo Kk | Transmit-receive circuit changing switch system |
| FR2518854B1 (fr) * | 1981-12-18 | 1986-08-08 | Thomson Csf Mat Tel | Poste telephonique a amplificateurs de parole |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE732118C (de) * | 1938-02-05 | 1943-02-22 | Aeg | Anordnung zur Verhinderung der Selbsterregung infolge akustischer Rueckkopplung bei einer Fernsprechteilnehmerstation |
| DE882420C (de) * | 1938-04-12 | 1953-07-09 | Siemens Ag | Schaltungsanordnung fuer Rueckkopplungssperren in Lautfernsprechanlagen |
| US2369460A (en) * | 1943-04-19 | 1945-02-13 | Automatic Elect Lab | Transmission system |
| DE887222C (de) * | 1945-02-01 | 1953-08-20 | Aeg | Verfahren zur Stromversorgung fuer Verstaerkereinrichtungen bei Fernsprechstellen |
| US2542922A (en) * | 1945-07-02 | 1951-02-20 | Automatic Elect Lab | Loud speaking telephine instrument |
| GB701607A (en) * | 1951-05-29 | 1953-12-30 | Leonard Ernest Ryall | Improvements in or relating to two-way telecommunication systems |
| DE1049430B (de) * | 1954-02-24 | 1959-01-29 | Svenska Reläfabriken AB, Stockholm | Sprachgesteuerter Zweiwegverstärker für Fernsprechanlagen, insbesondere Gegensprechanlagen, mit je einer regelbaren Verstärkereinheit für jede Übertragungsrichtung |
| US2785231A (en) * | 1954-02-25 | 1957-03-12 | Bell Telephone Labor Inc | Telephone set with amplifier |
| BE565189A (da) * | 1957-01-15 |
-
0
- BE BE565494D patent/BE565494A/xx unknown
- NL NL225471D patent/NL225471A/xx unknown
-
1957
- 1957-12-26 US US705382A patent/US3027429A/en not_active Expired - Lifetime
- 1957-12-30 GB GB40338/57A patent/GB842274A/en not_active Expired
- 1957-12-31 FR FR1191363D patent/FR1191363A/fr not_active Expired
-
1958
- 1958-02-05 DE DES56859A patent/DE1160897B/de active Pending
- 1958-03-12 CH CH361034D patent/CH361034A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3027429A (en) | 1962-03-27 |
| FR1191363A (fr) | 1959-10-19 |
| GB842274A (en) | 1960-07-27 |
| CH361034A (de) | 1962-03-31 |
| NL225471A (da) | 1900-01-01 |
| DE1160897B (de) | 1964-01-09 |