LU72147A1 - - Google Patents

Info

Publication number
LU72147A1
LU72147A1 LU72147A LU72147A LU72147A1 LU 72147 A1 LU72147 A1 LU 72147A1 LU 72147 A LU72147 A LU 72147A LU 72147 A LU72147 A LU 72147A LU 72147 A1 LU72147 A1 LU 72147A1
Authority
LU
Luxembourg
Application number
LU72147A
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 filed Critical
Publication of LU72147A1 publication Critical patent/LU72147A1/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Telephonic Communication Services (AREA)
  • Facsimiles In General (AREA)
LU72147A 1974-03-29 1975-03-27 LU72147A1 (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2415368A DE2415368B1 (de) 1974-03-29 1974-03-29 Schaltungsanordnung für Fernsprechanlagen, insbesondere Fernsprechnebenstellenanlagen, zur einwandfreien Erkennung des ankommenden Ruf wechselstromes bei ankommender Belegung einer Verbindungsleitung

Publications (1)

Publication Number Publication Date
LU72147A1 true LU72147A1 (enrdf_load_html_response) 1975-08-20

Family

ID=5911640

Family Applications (1)

Application Number Title Priority Date Filing Date
LU72147A LU72147A1 (enrdf_load_html_response) 1974-03-29 1975-03-27

Country Status (11)

Country Link
AT (1) AT334983B (enrdf_load_html_response)
BE (1) BE827366A (enrdf_load_html_response)
CH (1) CH588196A5 (enrdf_load_html_response)
DE (1) DE2415368B1 (enrdf_load_html_response)
DK (1) DK115975A (enrdf_load_html_response)
FR (1) FR2266392B1 (enrdf_load_html_response)
GB (1) GB1495994A (enrdf_load_html_response)
IT (1) IT1034679B (enrdf_load_html_response)
LU (1) LU72147A1 (enrdf_load_html_response)
NL (1) NL7503440A (enrdf_load_html_response)
SE (1) SE7503635L (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT380978B (de) * 1984-04-27 1986-08-11 Uher Ag Einrichtung zur bewertung von empfangssignalen in tonfrequenz-rundsteuerempfaengern (tre)

Also Published As

Publication number Publication date
IT1034679B (it) 1979-10-10
DK115975A (enrdf_load_html_response) 1975-09-30
CH588196A5 (enrdf_load_html_response) 1977-05-31
SE7503635L (enrdf_load_html_response) 1975-09-30
FR2266392A1 (enrdf_load_html_response) 1975-10-24
BE827366A (fr) 1975-09-29
DE2415368B1 (de) 1975-07-03
ATA163075A (de) 1976-06-15
FR2266392B1 (enrdf_load_html_response) 1977-11-18
NL7503440A (nl) 1975-10-01
AT334983B (de) 1977-02-10
GB1495994A (en) 1977-12-21

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