ES384060A1 - Equipo de operadora a cuatro hilos. - Google Patents

Equipo de operadora a cuatro hilos.

Info

Publication number
ES384060A1
ES384060A1 ES384060A ES384060A ES384060A1 ES 384060 A1 ES384060 A1 ES 384060A1 ES 384060 A ES384060 A ES 384060A ES 384060 A ES384060 A ES 384060A ES 384060 A1 ES384060 A1 ES 384060A1
Authority
ES
Spain
Prior art keywords
coupling
input
amplifier
transmission
operator
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.)
Expired
Application number
ES384060A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES384060A1 publication Critical patent/ES384060A1/es
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Amplifiers (AREA)
ES384060A 1969-09-30 1970-09-29 Equipo de operadora a cuatro hilos. Expired ES384060A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6933246A FR2058843A5 (es) 1969-09-30 1969-09-30

Publications (1)

Publication Number Publication Date
ES384060A1 true ES384060A1 (es) 1972-12-16

Family

ID=9040795

Family Applications (1)

Application Number Title Priority Date Filing Date
ES384060A Expired ES384060A1 (es) 1969-09-30 1970-09-29 Equipo de operadora a cuatro hilos.

Country Status (3)

Country Link
ES (1) ES384060A1 (es)
FR (1) FR2058843A5 (es)
GB (1) GB1282190A (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681409A5 (en) * 1990-10-11 1993-03-15 Siemens Ag Albis Telephone connection speech monitoring circuit - combines extracted data words obtained from incoming and outgoing speech signals

Also Published As

Publication number Publication date
FR2058843A5 (es) 1971-05-28
GB1282190A (en) 1972-07-19

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