SE397162B - Kretsanordning for konferenskoppling av telefonabonnenter - Google Patents
Kretsanordning for konferenskoppling av telefonabonnenterInfo
- Publication number
- SE397162B SE397162B SE7402474A SE7402474A SE397162B SE 397162 B SE397162 B SE 397162B SE 7402474 A SE7402474 A SE 7402474A SE 7402474 A SE7402474 A SE 7402474A SE 397162 B SE397162 B SE 397162B
- Authority
- SE
- Sweden
- Prior art keywords
- circuit device
- telephone subscribers
- conference connection
- conference
- subscribers
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00343826A US3824344A (en) | 1973-03-22 | 1973-03-22 | Conference bridge circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
SE397162B true SE397162B (sv) | 1977-10-17 |
Family
ID=23347840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7402474A SE397162B (sv) | 1973-03-22 | 1974-02-25 | Kretsanordning for konferenskoppling av telefonabonnenter |
Country Status (11)
Country | Link |
---|---|
US (1) | US3824344A (xx) |
JP (1) | JPS557986B2 (xx) |
BE (1) | BE812636A (xx) |
CA (1) | CA992229A (xx) |
CH (1) | CH589986A5 (xx) |
DE (1) | DE2413075C3 (xx) |
FR (1) | FR2222811B1 (xx) |
GB (1) | GB1447694A (xx) |
IT (1) | IT1009344B (xx) |
NL (1) | NL165016C (xx) |
SE (1) | SE397162B (xx) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3882276A (en) * | 1974-03-22 | 1975-05-06 | Bell Telephone Labor Inc | Conferencing system utilizing oppositely phased hybrids |
US3885100A (en) * | 1974-05-31 | 1975-05-20 | Bell Telephone Labor Inc | Six-port conference amplifier circuit |
US3993867A (en) * | 1974-10-15 | 1976-11-23 | Motorola, Inc. | Digital single signal line full duplex method and apparatus |
USRE30111E (en) * | 1974-10-15 | 1979-10-09 | Motorola, Inc. | Digital single signal line full duplex method and apparatus |
US3970797A (en) * | 1975-01-13 | 1976-07-20 | Gte Sylvania Incorporated | Digital conference bridge |
US3991279A (en) * | 1975-05-23 | 1976-11-09 | Bell Telephone Laboratories, Incorporated | Monobus interface circuit |
US3991280A (en) * | 1975-05-23 | 1976-11-09 | Bell Telephone Laboratories, Incorporated | Monobus variable resistance transmission circuit |
US4045615A (en) * | 1976-05-21 | 1977-08-30 | Bell Telephone Laboratories, Incorporated | Monobus interface circuit using opto-coupled hybrids |
US4139731A (en) * | 1977-09-12 | 1979-02-13 | Wescom, Inc. | Telephone conference system with active analog conference |
JPS5921237B2 (ja) * | 1978-02-01 | 1984-05-18 | ミテル・コ−ポレ−シヨン | 電話ライン回路 |
DE2833712C3 (de) * | 1978-07-28 | 1982-04-08 | Siemens AG, 1000 Berlin und 8000 München | Nachrichtenübertragungseinrichtung mit mehreren aus separaten Sende- und Empfangsleitungen gebildeten Übertragungswegen |
CA1154185A (en) * | 1981-01-23 | 1983-09-20 | Patrick R. Beirne | Subscriber line interface circuit |
JPS5976160U (ja) * | 1982-11-12 | 1984-05-23 | 富士通株式会社 | 拡声会議電話装置 |
FI79769C (fi) * | 1988-06-10 | 1991-01-14 | Heikki Malkki | Snabbtelefonsystem samt foerfarande foer uppkoppling i ett snabbtelefonsystem. |
US4982426A (en) * | 1989-01-19 | 1991-01-01 | Northern Telecom Limited | Telecommunications line interface circuits |
US5579530A (en) * | 1992-06-11 | 1996-11-26 | Intel Corporation | Method and apparatus for dynamically allocating access time to a resource shared between a peripheral bus and a host bus by dynamically controlling the size of burst data transfers on the peripheral bus |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3108157A (en) * | 1959-06-15 | 1963-10-22 | Bell Telephone Labor Inc | Multiple station communication circuit |
US3060265A (en) * | 1960-01-26 | 1962-10-23 | Itt | Conference call circuit |
US3511931A (en) * | 1966-02-02 | 1970-05-12 | Sylvania Electric Prod | Conferencing networks employing virtual ground summation to obtain isolation |
US3524929A (en) * | 1967-06-29 | 1970-08-18 | Automatic Elect Lab | Telephone conference circuit |
US3502823A (en) * | 1967-10-26 | 1970-03-24 | Bell Telephone Labor Inc | Hybridless bilateral transmission circuit |
FR2120248A5 (xx) * | 1970-12-04 | 1972-08-18 | Int Standard Electric Corp | |
US3761624A (en) * | 1972-07-31 | 1973-09-25 | Bell Telephone Labor Inc | Time division signal transfer network |
US3789152A (en) * | 1972-12-11 | 1974-01-29 | Bell Telephone Labor Inc | Data format converter |
US3789154A (en) * | 1972-12-11 | 1974-01-29 | Bell Telephone Labor Inc | Switchhook status signaling arrangement |
US3787631A (en) * | 1972-12-11 | 1974-01-22 | Bell Telephone Labor Inc | Time slot number compensating arrangement |
-
1973
- 1973-03-22 US US00343826A patent/US3824344A/en not_active Expired - Lifetime
- 1973-11-14 CA CA185,758A patent/CA992229A/en not_active Expired
-
1974
- 1974-02-25 SE SE7402474A patent/SE397162B/xx not_active IP Right Cessation
- 1974-03-12 GB GB1091874A patent/GB1447694A/en not_active Expired
- 1974-03-18 NL NL7403597.A patent/NL165016C/xx not_active IP Right Cessation
- 1974-03-19 CH CH376774A patent/CH589986A5/xx not_active IP Right Cessation
- 1974-03-19 DE DE2413075A patent/DE2413075C3/de not_active Expired
- 1974-03-20 IT IT67864/74A patent/IT1009344B/it active
- 1974-03-21 BE BE142280A patent/BE812636A/xx not_active IP Right Cessation
- 1974-03-21 FR FR7409757A patent/FR2222811B1/fr not_active Expired
- 1974-03-22 JP JP3164774A patent/JPS557986B2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2413075A1 (de) | 1974-10-03 |
US3824344A (en) | 1974-07-16 |
AU6676474A (en) | 1975-09-18 |
FR2222811A1 (xx) | 1974-10-18 |
CA992229A (en) | 1976-06-29 |
NL165016C (nl) | 1981-02-16 |
JPS557986B2 (xx) | 1980-02-29 |
NL165016B (nl) | 1980-09-15 |
NL7403597A (xx) | 1974-09-24 |
JPS49129408A (xx) | 1974-12-11 |
DE2413075C3 (de) | 1980-09-11 |
DE2413075B2 (de) | 1976-12-23 |
BE812636A (fr) | 1974-07-15 |
CH589986A5 (xx) | 1977-07-29 |
FR2222811B1 (xx) | 1979-01-26 |
IT1009344B (it) | 1976-12-10 |
GB1447694A (en) | 1976-08-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE399291B (sv) | Anordning vid ljudisolerande mellanveggar | |
SE397162B (sv) | Kretsanordning for konferenskoppling av telefonabonnenter | |
CA925233A (en) | Subscriber telephone circuit | |
IT946456B (it) | Impianto di prova di centrali tele foniche automatiche mediante chia mate simultanee | |
BE821219A (fr) | Circuit numerique de conference pour systeme de telecommunication | |
SE392557B (sv) | Abonnenttelefonapparat | |
CA941082A (en) | Telephone subscribers instrument circuits | |
SE381547B (sv) | Kretsanordning for fordelning av inkommande anrop | |
CA949245A (en) | Telephone subscriber line circuit | |
IT1044397B (it) | Generatore automatico di chiamate telefoniche | |
BE784382A (fr) | Circuit d'abonnes telephoniques | |
FR2320015A1 (fr) | Circuit de conference pour centraux telephoniques de commutation de type numerique | |
IT1014175B (it) | Circuito telefonico interurbano | |
SE389954C (sv) | Telefonapparat | |
AT336694B (de) | Nebenstellen-fernsprechanlage | |
AT315251B (de) | Fernsprech-Handapparat | |
AT323244B (de) | Zeitmultiplex-fernsprechvermittlungsanlage | |
GB1440542A (en) | Push-button calling circuits for telephone sets | |
SE399170B (sv) | Anordning for debitering av telefonsamtal | |
IT1019932B (it) | Apparecchio telefonico | |
DK124509B (da) | Telefonapparat til tonefrekvent nummervalg. | |
ES215101Y (es) | Aparato telefonico de abonado. | |
BR7400666D0 (pt) | Dispositivo para discagem de aparelho telefonico | |
SE406022B (sv) | Kopplingsanordning for vidarekoppling av anrop i en telefonanleggning | |
CA938040A (en) | Telephone subscriber line circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 7402474-6 Effective date: 19900130 Format of ref document f/p: F |