CA1185024A - Signalling in pbx systems - Google Patents
Signalling in pbx systemsInfo
- Publication number
- CA1185024A CA1185024A CA000386626A CA386626A CA1185024A CA 1185024 A CA1185024 A CA 1185024A CA 000386626 A CA000386626 A CA 000386626A CA 386626 A CA386626 A CA 386626A CA 1185024 A CA1185024 A CA 1185024A
- Authority
- CA
- Canada
- Prior art keywords
- signalling
- wire
- pair
- voltage
- central device
- 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.)
- Expired
Links
- 230000011664 signaling Effects 0.000 title claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000010363 phase shift Effects 0.000 abstract description 6
- 239000003990 capacitor Substances 0.000 description 10
- 230000000007 visual effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 241000518994 Conta Species 0.000 description 1
- 241000353097 Molva molva Species 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4906—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using binary codes
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Telephonic Communication Services (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Meter Arrangements (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3036182.1 | 1980-09-25 | ||
| DE3036182A DE3036182C2 (de) | 1980-09-25 | 1980-09-25 | Verfahren zur wechselseitigen Übertragung von binären Digitalsignalen zwischen einer zentralen Einrichtung und mit ihr verbundenen Fernsprechteilnehmerstellen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1185024A true CA1185024A (en) | 1985-04-02 |
Family
ID=6112832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000386626A Expired CA1185024A (en) | 1980-09-25 | 1981-09-24 | Signalling in pbx systems |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0048925B1 (enExample) |
| AR (1) | AR230911A1 (enExample) |
| AT (1) | ATE6719T1 (enExample) |
| AU (1) | AU543544B2 (enExample) |
| BR (1) | BR8106120A (enExample) |
| CA (1) | CA1185024A (enExample) |
| DE (1) | DE3036182C2 (enExample) |
| FI (1) | FI74567C (enExample) |
| GB (1) | GB2085695B (enExample) |
| IN (1) | IN155068B (enExample) |
| NO (1) | NO153589C (enExample) |
| TR (1) | TR21185A (enExample) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3248276A1 (de) * | 1982-12-28 | 1984-06-28 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Schnittstellenschaltung fuer ein fernmeldesystem |
| DE4107593C1 (enExample) * | 1991-03-09 | 1992-05-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3215779A (en) * | 1961-02-24 | 1965-11-02 | Hallicrafters Co | Digital data conversion and transmission system |
| CA1018270A (en) * | 1972-05-23 | 1977-09-27 | Federico R. Laliccia | Key telephone system using time division and space division control |
| US4046972A (en) * | 1976-10-27 | 1977-09-06 | Bell Telephone Laboratories, Incorporated | Key telephone station set circuit |
-
1980
- 1980-09-25 DE DE3036182A patent/DE3036182C2/de not_active Expired
-
1981
- 1981-09-10 IN IN1017/CAL/81A patent/IN155068B/en unknown
- 1981-09-18 AR AR286801A patent/AR230911A1/es active
- 1981-09-21 AT AT81107505T patent/ATE6719T1/de not_active IP Right Cessation
- 1981-09-21 NO NO813203A patent/NO153589C/no unknown
- 1981-09-21 EP EP81107505A patent/EP0048925B1/de not_active Expired
- 1981-09-24 BR BR8106120A patent/BR8106120A/pt unknown
- 1981-09-24 GB GB8128946A patent/GB2085695B/en not_active Expired
- 1981-09-24 TR TR21185A patent/TR21185A/xx unknown
- 1981-09-24 CA CA000386626A patent/CA1185024A/en not_active Expired
- 1981-09-24 AU AU75644/81A patent/AU543544B2/en not_active Ceased
- 1981-09-24 FI FI812977A patent/FI74567C/fi not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| IN155068B (enExample) | 1984-12-29 |
| BR8106120A (pt) | 1982-06-15 |
| DE3036182A1 (de) | 1982-04-01 |
| ATE6719T1 (de) | 1984-03-15 |
| NO153589B (no) | 1986-01-06 |
| AU7564481A (en) | 1982-04-01 |
| FI812977L (fi) | 1982-03-26 |
| AR230911A1 (es) | 1984-07-31 |
| FI74567B (fi) | 1987-10-30 |
| TR21185A (tr) | 1983-12-06 |
| EP0048925A1 (de) | 1982-04-07 |
| GB2085695B (en) | 1984-09-12 |
| AU543544B2 (en) | 1985-04-26 |
| NO153589C (no) | 1986-04-16 |
| GB2085695A (en) | 1982-04-28 |
| DE3036182C2 (de) | 1983-12-01 |
| NO813203L (no) | 1982-03-26 |
| EP0048925B1 (de) | 1984-03-14 |
| FI74567C (fi) | 1988-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |