IT1087789B - Impianto di comunicazione telefonica collettiva - Google Patents

Impianto di comunicazione telefonica collettiva

Info

Publication number
IT1087789B
IT1087789B IT28683/77A IT2868377A IT1087789B IT 1087789 B IT1087789 B IT 1087789B IT 28683/77 A IT28683/77 A IT 28683/77A IT 2868377 A IT2868377 A IT 2868377A IT 1087789 B IT1087789 B IT 1087789B
Authority
IT
Italy
Prior art keywords
communication system
telephone communication
collective telephone
collective
telephone
Prior art date
Application number
IT28683/77A
Other languages
English (en)
Original Assignee
Western Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Electric Co filed Critical Western Electric Co
Application granted granted Critical
Publication of IT1087789B publication Critical patent/IT1087789B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
IT28683/77A 1976-10-18 1977-10-17 Impianto di comunicazione telefonica collettiva IT1087789B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/733,380 US4049920A (en) 1976-10-18 1976-10-18 Analog signal summing conference circuit

Publications (1)

Publication Number Publication Date
IT1087789B true IT1087789B (it) 1985-06-04

Family

ID=24947369

Family Applications (1)

Application Number Title Priority Date Filing Date
IT28683/77A IT1087789B (it) 1976-10-18 1977-10-17 Impianto di comunicazione telefonica collettiva

Country Status (10)

Country Link
US (1) US4049920A (it)
JP (1) JPS5915548B2 (it)
CA (1) CA1090927A (it)
CH (1) CH624520A5 (it)
DE (1) DE2746624C2 (it)
FR (1) FR2368186A1 (it)
GB (1) GB1562937A (it)
IT (1) IT1087789B (it)
NL (1) NL7711366A (it)
SE (1) SE7711282L (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7807043A (nl) * 1977-07-19 1979-01-23 Siemens Ag Schakelinichting voor het omzetten van analoge signalen in digitale signalen en omgekeerd.
US4253000A (en) * 1979-01-18 1981-02-24 Rolm Corporation Method and system for reducing conference bridge oscillations
US4293946A (en) * 1979-11-21 1981-10-06 International Telephone And Telegraph Corporation Trilateral duplex path conferencing system with broadcast capability
US4340960A (en) * 1980-07-25 1982-07-20 Bell Telephone Laboratories, Incorporated Time division switching system
NL8006518A (nl) * 1980-12-01 1982-07-01 Philips Nv Conferentiestelsel voor telefonie.
GB2110057B (en) * 1981-10-22 1986-06-25 Bloomfield James Warman Improvements in and relating to telephone conference amplifiers, and telephone conference bridges incorporating the same
US4558180A (en) * 1983-10-25 1985-12-10 At&T Bell Laboratories Programmable audio mixer
SE449152B (sv) * 1986-03-19 1987-04-06 Paul Gosta Wilhelm Rosen Kommunikationsanleggning innefattande ett flertal enheter vilka kan uppretthalla en konferenskoppling
US5231629A (en) * 1990-10-01 1993-07-27 Motorola, Inc. Full-duplex communication system
DE4126814A1 (de) * 1991-08-09 1993-02-11 Deutsche Telephonwerk Kabel Schaltungsanordnung fuer eine konferenzeinrichtung
JPH069555U (ja) * 1992-07-14 1994-02-08 株式会社河合楽器製作所 収納ケース
US20040190701A1 (en) * 2003-03-28 2004-09-30 Versatel Networks Inc. Apparatus and method for a distributed conference bridge

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108157A (en) * 1959-06-15 1963-10-22 Bell Telephone Labor Inc Multiple station communication circuit
CH408129A (de) * 1963-11-17 1966-02-28 Standard Telephon & Radio Ag Konferenzschaltung für Telephon- Teilnehmer
CH489161A (de) * 1963-11-17 1970-04-15 Standard Telephon & Radio Ag Konferenzschaltung für Telephon-Teilnehmer
NL7016339A (it) * 1970-11-09 1972-05-12
JPS5544752B2 (it) * 1973-02-01 1980-11-13
US3828146A (en) * 1973-03-22 1974-08-06 Bell Telephone Labor Inc Time division conference hybrid circuit
US3835259A (en) * 1973-03-22 1974-09-10 Bell Telephone Labor Inc Time division conference hybrid circuit
JPS5052064A (it) * 1973-09-11 1975-05-09
US3843636A (en) * 1974-01-25 1974-10-22 Morton Norwich Products Inc 1-(5-(p-methoxyphenyl)furfurylidene)amino)hydantoin
US3857835A (en) * 1974-01-25 1974-12-31 Morton Norwich Products Inc 1-(5-(p-nitro phenyl)furfurylidene) amino)-5,6-dihydrouracil
US3882276A (en) * 1974-03-22 1975-05-06 Bell Telephone Labor Inc Conferencing system utilizing oppositely phased hybrids
US3991280A (en) * 1975-05-23 1976-11-09 Bell Telephone Laboratories, Incorporated Monobus variable resistance transmission circuit

Also Published As

Publication number Publication date
FR2368186A1 (fr) 1978-05-12
GB1562937A (en) 1980-03-19
JPS5350603A (en) 1978-05-09
JPS5915548B2 (ja) 1984-04-10
NL7711366A (nl) 1978-04-20
DE2746624C2 (de) 1983-10-27
US4049920A (en) 1977-09-20
SE7711282L (sv) 1978-04-19
DE2746624A1 (de) 1978-04-20
CA1090927A (en) 1980-12-02
CH624520A5 (it) 1981-07-31
FR2368186B1 (it) 1982-02-19

Similar Documents

Publication Publication Date Title
SE7810439L (sv) Kommunikationssystem
NL176825B (nl) Radiocommunicatiestelsel.
SE7804577L (sv) Kommunikationsanleggning
NL176824C (nl) Radiocommunicatiestelsel.
NL189226C (nl) Telecommunicatiestelsel.
NL7713960A (nl) Vitaal digitaal communicatiesysteem.
SE7700284L (sv) Delad teckplatta for telefonuttag
IT1087789B (it) Impianto di comunicazione telefonica collettiva
AT360593B (de) Funktelefoniesystem
NL186791C (nl) Telecommunicatiecentrale.
DK390276A (da) Kommunikationsanleg
ATA175777A (de) Sprechfunksystem
NL7713405A (nl) Telefoontoestel.
NL178831C (nl) Communicatiestelsel.
NL7705919A (nl) Communicatiesysteem.
PL208438A1 (pl) System lacznosci
NL7812530A (nl) Communicatiestelsel.
NL7812534A (nl) Communicatiestelsel.
SE7712613L (sv) Telefonapparat
SE7612406L (sv) Kommunikationssystem
NL7709590A (nl) Telefoonstelsel.
NL7710118A (nl) Telecommunicatiecentrale.
SE399165B (sv) Datakommunikationsanleggning
JPS52120710A (en) Extension telephone system
NL171005C (nl) Telefoonverbindingsstelsel.