AU541648B2 - Telephone ring signalling system - Google Patents
Telephone ring signalling systemInfo
- 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
Links
- 230000011664 signaling Effects 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
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)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Telephonic Communication Services (AREA)
- Mobile Radio Communication Systems (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (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.
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) | ES8206125A1 (en) |
| MX (1) | MX150197A (en) |
| NO (1) | NO155598C (en) |
Cited By (1)
| 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)
| 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)
| 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 |
-
1981
- 1981-03-26 MX MX186568A patent/MX150197A/en unknown
- 1981-03-26 AU AU68765/81A patent/AU541648B2/en not_active Ceased
- 1981-03-27 BR BR8101844A patent/BR8101844A/en not_active IP Right Cessation
- 1981-03-28 AT AT81102363T patent/ATE17294T1/en not_active IP Right Cessation
- 1981-03-28 EP EP81102363A patent/EP0037540B1/en not_active Expired
- 1981-03-28 DE DE8181102363T patent/DE3173346D1/en not_active Expired
- 1981-03-30 CA CA000374135A patent/CA1172737A/en not_active Expired
- 1981-03-31 BE BE2/59088A patent/BE888193A/en not_active IP Right Cessation
- 1981-03-31 NO NO811094A patent/NO155598C/en unknown
- 1981-03-31 ES ES500922A patent/ES8206125A1/en not_active Expired
- 1981-03-31 JP JP4658281A patent/JPS56152361A/en active Granted
Cited By (1)
| 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 |
|---|---|
| AU6876581A (en) | 1981-10-08 |
| EP0037540A2 (en) | 1981-10-14 |
| EP0037540A3 (en) | 1982-09-15 |
| DE3173346D1 (en) | 1986-02-13 |
| JPH0342534B2 (en) | 1991-06-27 |
| JPS56152361A (en) | 1981-11-25 |
| NO811094L (en) | 1981-10-01 |
| NO155598C (en) | 1987-04-22 |
| BR8101844A (en) | 1981-10-06 |
| ES500922A0 (en) | 1982-08-16 |
| ATE17294T1 (en) | 1986-01-15 |
| MX150197A (en) | 1984-03-29 |
| ES8206125A1 (en) | 1982-08-16 |
| NO155598B (en) | 1987-01-12 |
| BE888193A (en) | 1981-09-30 |
| EP0037540B1 (en) | 1986-01-02 |
| CA1172737A (en) | 1984-08-14 |
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