IT1098032B - DEVICE TO PROVIDE THE CALL CURRENT IN TELECOMMUNICATIONS SYSTEMS WITH CENTRALIZED CONTROLS, ESPECIALLY IN TELEPHONE SWITCHING SYSTEMS - Google Patents

DEVICE TO PROVIDE THE CALL CURRENT IN TELECOMMUNICATIONS SYSTEMS WITH CENTRALIZED CONTROLS, ESPECIALLY IN TELEPHONE SWITCHING SYSTEMS

Info

Publication number
IT1098032B
IT1098032B IT26709/78A IT2670978A IT1098032B IT 1098032 B IT1098032 B IT 1098032B IT 26709/78 A IT26709/78 A IT 26709/78A IT 2670978 A IT2670978 A IT 2670978A IT 1098032 B IT1098032 B IT 1098032B
Authority
IT
Italy
Prior art keywords
systems
telephone switching
call current
centralized controls
telecommunications
Prior art date
Application number
IT26709/78A
Other languages
Italian (it)
Other versions
IT7826709A0 (en
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
Publication of IT7826709A0 publication Critical patent/IT7826709A0/en
Application granted granted Critical
Publication of IT1098032B publication Critical patent/IT1098032B/en

Links

Classifications

    • 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)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
IT26709/78A 1977-08-19 1978-08-11 DEVICE TO PROVIDE THE CALL CURRENT IN TELECOMMUNICATIONS SYSTEMS WITH CENTRALIZED CONTROLS, ESPECIALLY IN TELEPHONE SWITCHING SYSTEMS IT1098032B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2737543A DE2737543C3 (en) 1977-08-19 1977-08-19 Method for ringing power supply in telecommunications, in particular telephone switching systems

Publications (2)

Publication Number Publication Date
IT7826709A0 IT7826709A0 (en) 1978-08-11
IT1098032B true IT1098032B (en) 1985-08-31

Family

ID=6016855

Family Applications (1)

Application Number Title Priority Date Filing Date
IT26709/78A IT1098032B (en) 1977-08-19 1978-08-11 DEVICE TO PROVIDE THE CALL CURRENT IN TELECOMMUNICATIONS SYSTEMS WITH CENTRALIZED CONTROLS, ESPECIALLY IN TELEPHONE SWITCHING SYSTEMS

Country Status (7)

Country Link
CH (1) CH637256A5 (en)
DE (1) DE2737543C3 (en)
FR (1) FR2400808A1 (en)
GB (1) GB1560204A (en)
IT (1) IT1098032B (en)
NL (1) NL7807112A (en)
SE (1) SE7808777L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068748C (en) * 1996-02-07 2001-07-18 汇众实业总公司 Ringing current power source of program controlled exchanger
CN100546327C (en) * 2005-12-21 2009-09-30 华为技术有限公司 A kind of ringing-current control method and device in communication apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3601551A (en) * 1968-07-31 1971-08-24 Gte Automatic Electric Lab Inc Tone generator control circuit
US3581020A (en) * 1969-08-22 1971-05-25 Itt Ringing tone distribution circuits

Also Published As

Publication number Publication date
NL7807112A (en) 1979-02-21
FR2400808B1 (en) 1982-02-12
CH637256A5 (en) 1983-07-15
FR2400808A1 (en) 1979-03-16
DE2737543A1 (en) 1979-02-22
DE2737543C3 (en) 1980-05-29
IT7826709A0 (en) 1978-08-11
DE2737543B2 (en) 1979-09-13
GB1560204A (en) 1980-01-30
SE7808777L (en) 1979-02-20

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