IT956223B - CIRCUIT ARRANGEMENT FOR TELEPHONE SYSTEMS WITH INDUCTIVE COUPLING OF ACOUSTIC SIGNALS - Google Patents

CIRCUIT ARRANGEMENT FOR TELEPHONE SYSTEMS WITH INDUCTIVE COUPLING OF ACOUSTIC SIGNALS

Info

Publication number
IT956223B
IT956223B IT21669/72A IT2166972A IT956223B IT 956223 B IT956223 B IT 956223B IT 21669/72 A IT21669/72 A IT 21669/72A IT 2166972 A IT2166972 A IT 2166972A IT 956223 B IT956223 B IT 956223B
Authority
IT
Italy
Prior art keywords
circuit arrangement
acoustic signals
inductive coupling
telephone systems
telephone
Prior art date
Application number
IT21669/72A
Other languages
Italian (it)
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of IT956223B publication Critical patent/IT956223B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
IT21669/72A 1971-03-11 1972-03-10 CIRCUIT ARRANGEMENT FOR TELEPHONE SYSTEMS WITH INDUCTIVE COUPLING OF ACOUSTIC SIGNALS IT956223B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2111787 1971-03-11

Publications (1)

Publication Number Publication Date
IT956223B true IT956223B (en) 1973-10-10

Family

ID=5801255

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21669/72A IT956223B (en) 1971-03-11 1972-03-10 CIRCUIT ARRANGEMENT FOR TELEPHONE SYSTEMS WITH INDUCTIVE COUPLING OF ACOUSTIC SIGNALS

Country Status (9)

Country Link
AT (1) AT323811B (en)
BE (1) BE780525A (en)
CH (1) CH541914A (en)
DE (1) DE2111787B1 (en)
FR (1) FR2129593A5 (en)
GB (1) GB1370163A (en)
IT (1) IT956223B (en)
LU (1) LU64933A1 (en)
NL (1) NL7202872A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028498A (en) * 1974-10-07 1977-06-07 Solid State Systems, Inc. Private automatic branch exchange system and apparatus
DE3007942A1 (en) * 1980-03-01 1981-09-24 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Tone signal generator for telephone exchange - has circuit which can be connected to one or more subscribers as required and ordered by central controller
DE3014572C2 (en) * 1980-04-16 1982-12-09 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Circuit arrangement for sending low-frequency signals on connecting lines in telephone exchanges
IE54008B1 (en) * 1982-11-17 1989-05-10 Lake Electronic Tech Apparatus for delivering a signal on a telephone

Also Published As

Publication number Publication date
FR2129593A5 (en) 1972-10-27
BE780525A (en) 1972-09-11
NL7202872A (en) 1972-09-13
CH541914A (en) 1973-09-15
GB1370163A (en) 1974-10-16
AT323811B (en) 1975-07-25
LU64933A1 (en) 1972-07-07
DE2111787B1 (en) 1972-05-31

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