NL267461A - - Google Patents
Info
- Publication number
- NL267461A NL267461A NL267461DA NL267461A NL 267461 A NL267461 A NL 267461A NL 267461D A NL267461D A NL 267461DA NL 267461 A NL267461 A NL 267461A
- Authority
- NL
- Netherlands
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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60476A US3171901A (en) | 1960-10-04 | 1960-10-04 | Loud-speaking telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL267461A true NL267461A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1900-01-01 |
Family
ID=22029721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL267461D NL267461A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1960-10-04 |
Country Status (6)
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1029163A (en) * | 1964-05-29 | 1966-05-11 | Standard Telephones Cables Ltd | Improvements in or relating to telephone sets |
| US3395255A (en) * | 1964-07-01 | 1968-07-30 | Bell Telephone Labor Inc | Loudspeaking telephone |
| US3372239A (en) * | 1964-07-01 | 1968-03-05 | Bell Telephone Labor Inc | Voice-switched interphone system |
| SE306351B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1964-08-14 | 1968-11-25 | Standard Radio & Telefon | |
| US3423531A (en) * | 1965-08-16 | 1969-01-21 | Itt | Voice controlled amplifier |
| DE1298572B (de) * | 1967-03-17 | 1969-07-03 | Siemens Ag | Gegen- oder Wechselsprechanlage |
| SE339704B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1970-12-22 | 1971-10-18 | Ericsson Telefon Ab L M | |
| SE365375B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1972-12-18 | 1974-03-18 | Ericsson Telefon Ab L M | |
| US3787640A (en) * | 1972-12-26 | 1974-01-22 | Bell Telephone Labor Inc | Key telephone intercom circuit |
| NO134477C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1974-10-29 | 1976-10-13 | Manus Max | |
| US4155041A (en) | 1976-05-13 | 1979-05-15 | Burns Richard C | System for reducing noise transients |
| US4076968A (en) * | 1976-09-02 | 1978-02-28 | Bell Telephone Laboratories, Incorporated | Telephone ringer intensity control responsive to ambient noise |
| CA1181541A (en) * | 1982-05-21 | 1985-01-22 | Mitel Corporation | Loudspeaking telephone |
| US4490582A (en) * | 1983-02-18 | 1984-12-25 | At&T Information Systems Inc. | Speakerphone control circuit |
| GB2137458B (en) * | 1983-03-01 | 1986-11-19 | Standard Telephones Cables Ltd | Digital handsfree telephone |
| US4492824A (en) * | 1983-08-11 | 1985-01-08 | At&T Bell Laboratories | Speakerphone linear comparator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1814018A (en) * | 1928-06-06 | 1931-07-14 | American Telephone & Telegraph | Means for controlling sensitivity of voice operated devices |
| DE882420C (de) * | 1938-04-12 | 1953-07-09 | Siemens Ag | Schaltungsanordnung fuer Rueckkopplungssperren in Lautfernsprechanlagen |
| US2183389A (en) * | 1939-01-14 | 1939-12-12 | Bell Telephone Labor Inc | Indicating circuit |
| GB839975A (en) * | 1955-07-28 | 1960-06-29 | Telephone Mfg Co Ltd | Improvements in and relating to signal switched telecommunication circuits |
| DE1034696B (de) * | 1956-04-27 | 1958-07-24 | Telefunken Gmbh | Gegensprechanlage fuer den Sprechbetrieb in Raeumen mit hohem Stoerpegel |
| NL225471A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1957-11-26 | 1900-01-01 | ||
| DE1066625B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1963-09-30 | 1959-10-08 |
-
0
- NL NL267461D patent/NL267461A/xx unknown
-
1960
- 1960-10-04 US US60476A patent/US3171901A/en not_active Expired - Lifetime
-
1961
- 1961-08-17 DE DEW30564A patent/DE1156442B/de active Pending
- 1961-09-20 BE BE608354A patent/BE608354A/fr unknown
- 1961-09-21 GB GB33785/61A patent/GB916545A/en not_active Expired
- 1961-10-02 JP JP3533961A patent/JPS3823229B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1156442B (de) | 1963-10-31 |
| JPS3823229B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1963-10-31 |
| BE608354A (fr) | 1962-01-15 |
| US3171901A (en) | 1965-03-02 |
| GB916545A (en) | 1963-01-23 |