PT74762A - Conference circuit for switching telephone exchanges of numerical type - Google Patents

Conference circuit for switching telephone exchanges of numerical type

Info

Publication number
PT74762A
PT74762A PT74762A PT7476282A PT74762A PT 74762 A PT74762 A PT 74762A PT 74762 A PT74762 A PT 74762A PT 7476282 A PT7476282 A PT 7476282A PT 74762 A PT74762 A PT 74762A
Authority
PT
Portugal
Prior art keywords
telephone exchanges
conference circuit
switching telephone
numerical type
numerical
Prior art date
Application number
PT74762A
Other languages
Portuguese (pt)
Other versions
PT74762B (en
Original Assignee
Italtel Spa
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 Italtel Spa filed Critical Italtel Spa
Publication of PT74762A publication Critical patent/PT74762A/en
Publication of PT74762B publication Critical patent/PT74762B/en

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
    • H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
    • H04M3/569—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants using the instant speaker's algorithm

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
PT74762A 1981-04-16 1982-04-15 Conference circuit for switching telephone exchanges of numerical type PT74762B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8121227A IT1211024B (en) 1981-04-16 1981-04-16 CONFERENCE CIRCUIT FOR NUMERIC TYPE TELEPHONE SWITCHING UNITS.

Publications (2)

Publication Number Publication Date
PT74762A true PT74762A (en) 1982-05-01
PT74762B PT74762B (en) 1983-11-30

Family

ID=11178683

Family Applications (1)

Application Number Title Priority Date Filing Date
PT74762A PT74762B (en) 1981-04-16 1982-04-15 Conference circuit for switching telephone exchanges of numerical type

Country Status (9)

Country Link
BR (1) BR8202162A (en)
DE (1) DE3214099A1 (en)
ES (1) ES8303858A1 (en)
FR (1) FR2504333A1 (en)
GB (1) GB2100094A (en)
GR (1) GR76042B (en)
IT (1) IT1211024B (en)
PT (1) PT74762B (en)
YU (1) YU80382A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2183965A (en) * 1985-12-10 1987-06-10 Weng Pu San Circuit structure of teleconference
JPH03166894A (en) * 1989-11-27 1991-07-18 Matsushita Electric Ind Co Ltd Key telephone system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190744A (en) * 1978-06-05 1980-02-26 Siemens Aktiengesellschaft Circuit arrangement and process for producing conference connections between three conference parties in a PCM time multiplex switching system
US4224688A (en) * 1978-10-30 1980-09-23 Northern Telecom Limited Digital conference circuit
DE3005739C2 (en) * 1980-02-15 1988-11-10 Nixdorf Computer Ag, 4790 Paderborn Method for controlling the transmission of PCM signals between connection points of a PCM time division multiplex telecommunications network in a conference operation and circuit arrangement for carrying out the method

Also Published As

Publication number Publication date
BR8202162A (en) 1983-03-29
GB2100094A (en) 1982-12-15
IT8121227A0 (en) 1981-04-16
PT74762B (en) 1983-11-30
ES511385A0 (en) 1983-03-01
FR2504333A1 (en) 1982-10-22
IT1211024B (en) 1989-09-29
GR76042B (en) 1984-08-03
YU80382A (en) 1985-03-20
ES8303858A1 (en) 1983-03-01
DE3214099A1 (en) 1982-11-18

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