AU541648B2 - Telephone ring signalling system - Google Patents

Telephone ring signalling system

Info

Publication number
AU541648B2
AU541648B2 AU68765/81A AU6876581A AU541648B2 AU 541648 B2 AU541648 B2 AU 541648B2 AU 68765/81 A AU68765/81 A AU 68765/81A AU 6876581 A AU6876581 A AU 6876581A AU 541648 B2 AU541648 B2 AU 541648B2
Authority
AU
Australia
Prior art keywords
ringing
signal bus
line
lines
group
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.)
Ceased
Application number
AU68765/81A
Other versions
AU6876581A (en
Inventor
Russ C. Casterline
Ramon C.W. Chea
Santanu Das
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.)
Alcatel Lucent NV
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of AU6876581A publication Critical patent/AU6876581A/en
Application granted granted Critical
Publication of AU541648B2 publication Critical patent/AU541648B2/en
Anticipated expiration legal-status Critical
Ceased 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephone Function (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Optical Communication System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

1. Method of providing ringing signals the composition and duration of which are determined by ringing circuits (74-78) and by ringing supervision circuits (122-124) for a plurality of telecommunication lines (42 to 48) interconnectable via a switching network, the connection status of said lines being supervised line by line and said lines being connectable group by group, via a common ringing signal bus (82), to a common ringing circuit (74-78) and connected group by group each with a ringing answering detector (122), especially for digital telephone switching systems in which the analogic number lines are connected to the switching network via line termination circuits (12) in which conversion takes place between the analog signals on the subscriber line and the digital signals in the switching network, characterized in, that in the ringing circuit (74-78) a.c. voltages of different frequencies (f1 to f4), generated from several ringing signal reference voltage sources (100 to 106), are transmitted to the common ringing signal bus (82) as an amplified a.c. ringing voltage depending on control signals provided by ringing interval detectors (124), that the ringing a.c. voltages are supplied to the connecting circuits (50 to 56) of the corresponding group (0) of telecommunication lines (42 to 48) via the ringing signal bus (82), that the control signals supplied by the ringing interval detectors (124) are also supplied to the connecting circuits (50 to 56) of the corresponding group (0) of telecommunication lines (42 to 48), that in the connecting circuits (50 to 56) each individual telecommunication line is connected to the ringing signal bus (82) at the correct time on the basis of the control signals formed by the ringing interval detector (124) depending on the ringing status on the ringing signal bus (82), and that in the corresponding connecting circuit (50-56) the connecting of a telecommunication line to be run to the ringing signal bus is controlled in such a way that the telecommunication line receives immediate ringing by this path.
AU68765/81A 1980-03-31 1981-03-26 Telephone ring signalling system Ceased AU541648B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13575680A 1980-03-31 1980-03-31
US135756 1980-03-31

Publications (2)

Publication Number Publication Date
AU6876581A AU6876581A (en) 1981-10-08
AU541648B2 true AU541648B2 (en) 1985-01-17

Family

ID=22469517

Family Applications (1)

Application Number Title Priority Date Filing Date
AU68765/81A Ceased AU541648B2 (en) 1980-03-31 1981-03-26 Telephone ring signalling system

Country Status (11)

Country Link
EP (1) EP0037540B1 (en)
JP (1) JPS56152361A (en)
AT (1) ATE17294T1 (en)
AU (1) AU541648B2 (en)
BE (1) BE888193A (en)
BR (1) BR8101844A (en)
CA (1) CA1172737A (en)
DE (1) DE3173346D1 (en)
ES (1) ES500922A0 (en)
MX (1) MX150197A (en)
NO (1) NO155598C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU588896B2 (en) * 1985-07-18 1989-09-28 Alcatel N.V. Ring signal generator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128449B (en) * 1982-10-08 1985-12-11 Standard Telephones Cables Ltd Tone generation circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2129281A5 (en) * 1971-03-11 1972-10-27 Ibm France
US4097694A (en) * 1975-07-09 1978-06-27 Toa Electric Company, Ltd. Time-division telephone system embodying trunks having demodulating-adder circuits
JPS53124008A (en) * 1977-04-06 1978-10-30 Oki Electric Ind Co Ltd Call signal transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU588896B2 (en) * 1985-07-18 1989-09-28 Alcatel N.V. Ring signal generator

Also Published As

Publication number Publication date
NO155598C (en) 1987-04-22
NO811094L (en) 1981-10-01
MX150197A (en) 1984-03-29
NO155598B (en) 1987-01-12
BR8101844A (en) 1981-10-06
EP0037540A2 (en) 1981-10-14
ES8206125A1 (en) 1982-08-16
ATE17294T1 (en) 1986-01-15
JPS56152361A (en) 1981-11-25
AU6876581A (en) 1981-10-08
DE3173346D1 (en) 1986-02-13
ES500922A0 (en) 1982-08-16
CA1172737A (en) 1984-08-14
BE888193A (en) 1981-09-30
EP0037540B1 (en) 1986-01-02
JPH0342534B2 (en) 1991-06-27
EP0037540A3 (en) 1982-09-15

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