IL53543A - D.c.ringing current arrangement for telephone substations - Google Patents

D.c.ringing current arrangement for telephone substations

Info

Publication number
IL53543A
IL53543A IL53543A IL5354377A IL53543A IL 53543 A IL53543 A IL 53543A IL 53543 A IL53543 A IL 53543A IL 5354377 A IL5354377 A IL 5354377A IL 53543 A IL53543 A IL 53543A
Authority
IL
Israel
Prior art keywords
ringing current
current arrangement
telephone substations
substations
telephone
Prior art date
Application number
IL53543A
Other languages
English (en)
Other versions
IL53543A0 (en
Original Assignee
Siemens Ag Albis
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 Albis filed Critical Siemens Ag Albis
Publication of IL53543A0 publication Critical patent/IL53543A0/xx
Publication of IL53543A publication Critical patent/IL53543A/xx

Links

Classifications

    • 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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
IL53543A 1976-12-10 1977-12-05 D.c.ringing current arrangement for telephone substations IL53543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1556976A CH604454A5 (en) 1976-12-10 1976-12-10 Telephone call signal circuit

Publications (2)

Publication Number Publication Date
IL53543A0 IL53543A0 (en) 1978-03-10
IL53543A true IL53543A (en) 1980-05-30

Family

ID=4410194

Family Applications (1)

Application Number Title Priority Date Filing Date
IL53543A IL53543A (en) 1976-12-10 1977-12-05 D.c.ringing current arrangement for telephone substations

Country Status (3)

Country Link
AT (1) AT354528B (de)
CH (1) CH604454A5 (de)
IL (1) IL53543A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
WO1993020645A1 (en) * 1992-04-03 1993-10-14 Northern Telecom Limited Telephone line interface circuit with voltage switching

Also Published As

Publication number Publication date
CH604454A5 (en) 1978-09-15
ATA6877A (de) 1979-06-15
IL53543A0 (en) 1978-03-10
AT354528B (de) 1979-01-10

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