AU3744093A - Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations - Google Patents

Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations

Info

Publication number
AU3744093A
AU3744093A AU37440/93A AU3744093A AU3744093A AU 3744093 A AU3744093 A AU 3744093A AU 37440/93 A AU37440/93 A AU 37440/93A AU 3744093 A AU3744093 A AU 3744093A AU 3744093 A AU3744093 A AU 3744093A
Authority
AU
Australia
Prior art keywords
connection
call
analog telephone
telephone receiver
supply voltage
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.)
Withdrawn
Application number
AU37440/93A
Inventor
Wolfgang Strzeletz
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.)
Siemens AG
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 AU3744093A publication Critical patent/AU3744093A/en
Withdrawn legal-status Critical Current

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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing
    • H04M3/06—Calling substations, e.g. by ringing the calling signal being supplied from the subscriber's line circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
AU37440/93A 1992-04-01 1993-03-25 Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations Withdrawn AU3744093A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4210838 1992-04-01
DE4210838 1992-04-01

Publications (1)

Publication Number Publication Date
AU3744093A true AU3744093A (en) 1993-11-08

Family

ID=6455729

Family Applications (1)

Application Number Title Priority Date Filing Date
AU37440/93A Withdrawn AU3744093A (en) 1992-04-01 1993-03-25 Combined supply voltage connection and call A.C. voltage generator and connection for analog telephone receiver stations in extension installations

Country Status (2)

Country Link
AU (1) AU3744093A (en)
WO (1) WO1993020646A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI97512C (en) * 1994-12-30 1996-12-27 Nokia Telecommunications Oy Generating a ringtone
GB2358989B (en) * 2000-02-03 2004-01-21 Lake Electronic Tech A circuit for developing an ac ringing voltage from a dc voltage supply

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2835526C2 (en) * 1978-08-14 1982-09-09 Siemens AG, 1000 Berlin und 8000 München Process for coil, relay contact and transformer-free ringing current and loop current feed
NL7904159A (en) * 1979-05-28 1980-12-02 Philips Nv DEVICE FOR SUPPLYING SIGNALS TO A TELEPHONE LINE.

Also Published As

Publication number Publication date
WO1993020646A1 (en) 1993-10-14

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