JPS5597769A - Method of and device for talking via plural different telephone sets - Google Patents
Method of and device for talking via plural different telephone setsInfo
- Publication number
- JPS5597769A JPS5597769A JP444080A JP444080A JPS5597769A JP S5597769 A JPS5597769 A JP S5597769A JP 444080 A JP444080 A JP 444080A JP 444080 A JP444080 A JP 444080A JP S5597769 A JPS5597769 A JP S5597769A
- Authority
- JP
- Japan
- Prior art keywords
- telephone sets
- plural different
- different telephone
- via plural
- talking via
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
-
- 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
- H04M9/087—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Telephonic Communication Services (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/004,255 US4253000A (en) | 1979-01-18 | 1979-01-18 | Method and system for reducing conference bridge oscillations |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5597769A true JPS5597769A (en) | 1980-07-25 |
JPS6339136B2 JPS6339136B2 (ja) | 1988-08-03 |
Family
ID=21709902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP444080A Granted JPS5597769A (en) | 1979-01-18 | 1980-01-18 | Method of and device for talking via plural different telephone sets |
Country Status (4)
Country | Link |
---|---|
US (1) | US4253000A (ja) |
EP (1) | EP0014044A1 (ja) |
JP (1) | JPS5597769A (ja) |
CA (1) | CA1129055A (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4547878A (en) * | 1983-06-28 | 1985-10-15 | Rockwell International Corporation | Non-linear adder |
DE3734447C1 (de) * | 1987-10-12 | 1989-05-18 | Telefonbau & Normalzeit Gmbh | Konferenz-Freisprecheinrichtung |
DE3823219C1 (ja) * | 1988-07-08 | 1989-05-18 | Telenorma Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt, De | |
US5271057A (en) * | 1991-10-09 | 1993-12-14 | Bell Communications Research, Inc. | Audio processing system for teleconferencing system |
US5434912A (en) * | 1993-08-11 | 1995-07-18 | Bell Communications Research, Inc. | Audio processing system for point-to-point and multipoint teleconferencing |
DE19524425A1 (de) * | 1995-07-05 | 1997-01-09 | Deutsche Telekom Ag | Verfahren zur Raum-Echokompensation für Endgeräte mit Freisprechmöglichkeit in digitalen Netzen |
FI112016B (fi) * | 2001-12-20 | 2003-10-15 | Nokia Corp | Konferenssipuhelujärjestely |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3429999A (en) * | 1966-09-06 | 1969-02-25 | Collins Radio Co | Circuit for preventing singing in audio systems |
US3551600A (en) * | 1968-02-23 | 1970-12-29 | Stromberg Carlson Corp | High capacity,high side-tone suppression,4-wire conference circuit |
DE2203536A1 (de) * | 1972-01-21 | 1973-07-26 | Deutsche Telephonwerk Kabel | Verfahren und schaltungsanordnung fuer freisprecheinrichtungen in fernmeldeanlagen |
US3882276A (en) * | 1974-03-22 | 1975-05-06 | Bell Telephone Labor Inc | Conferencing system utilizing oppositely phased hybrids |
US3984643A (en) * | 1975-04-24 | 1976-10-05 | Northern Electric Company Limited | Method and apparatus for establishing a plurality of simultaneous conferences in a PCM switching system |
US4049920A (en) * | 1976-10-18 | 1977-09-20 | Bell Telephone Laboratories, Incorporated | Analog signal summing conference circuit |
FR2369738A1 (fr) * | 1976-10-29 | 1978-05-26 | Thomson Csf | Dispositif de demodulation synchrone et poste telephonique utilisant un tel dispositif |
US4054757A (en) * | 1976-12-13 | 1977-10-18 | International Standard Electric Corporation | Conference circuit using PCM techniques |
US4153817A (en) * | 1977-11-25 | 1979-05-08 | Stromberg-Carlson Corporation | Digital conference circuit |
-
1979
- 1979-01-18 US US06/004,255 patent/US4253000A/en not_active Expired - Lifetime
-
1980
- 1980-01-08 EP EP80300075A patent/EP0014044A1/en not_active Withdrawn
- 1980-01-15 CA CA343,682A patent/CA1129055A/en not_active Expired
- 1980-01-18 JP JP444080A patent/JPS5597769A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0014044A1 (en) | 1980-08-06 |
JPS6339136B2 (ja) | 1988-08-03 |
CA1129055A (en) | 1982-08-03 |
US4253000A (en) | 1981-02-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54105904A (en) | Method of and device for distributing telephone call | |
JPS5639665A (en) | Method and device for digital conference | |
JPS5518193A (en) | Method of and device for waiting for telephone communication system | |
JPS53121604A (en) | Method and device for automatically making speciallyyrecorded magnetic tape | |
GB2005963B (en) | Interface circuit and method for telephone extension lines | |
JPS53101925A (en) | Method of and device for encoding picture | |
JPS53136404A (en) | Digital audio protecting system and method | |
JPS51135308A (en) | System for switching telephone set and method of switching same | |
JPS55112000A (en) | Method and device for talking using artificial voice | |
JPS5457570A (en) | Method and apparatus for making recording carrier | |
JPS5299383A (en) | Method of and apparatus for | |
JPS5417702A (en) | Device for and method of reproducing sound | |
JPS5597769A (en) | Method of and device for talking via plural different telephone sets | |
DE3565353D1 (en) | Peritelephone system for telephone set and peritelephone pieces of apparatus | |
JPS53125049A (en) | Method of and device for using photogate | |
GB2049263B (en) | Method and apparatus for manufacturing telecommunication cable | |
JPS55117198A (en) | Method and device for recording voice | |
JPS5443277A (en) | Method and apparatus for hydrolyzing porous solid | |
JPS5427996A (en) | Method and apparatus for forming magnetic compact | |
GB2055019B (en) | Telephone apparatus | |
GB2031248B (en) | Method and apparatus for measuring telephone line characteristics | |
GB2204402B (en) | Method and apparatus for audio location | |
JPS5491010A (en) | Method of and device for automatically informing no subscriber | |
JPS5487405A (en) | Method of and device for automatically connecting telephone sets of different channels | |
JPS5698705A (en) | Method and device for sound recording |