GB1543135A - Digital signal transmission systems and to alphabet code converters for such systems - Google Patents
Digital signal transmission systems and to alphabet code converters for such systemsInfo
- Publication number
- GB1543135A GB1543135A GB42189/77A GB4218977A GB1543135A GB 1543135 A GB1543135 A GB 1543135A GB 42189/77 A GB42189/77 A GB 42189/77A GB 4218977 A GB4218977 A GB 4218977A GB 1543135 A GB1543135 A GB 1543135A
- Authority
- GB
- United Kingdom
- Prior art keywords
- systems
- signals
- alphabet code
- acw1
- digital signal
- 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
- 230000008054 signal transmission Effects 0.000 title 1
- 230000005540 biological transmission Effects 0.000 abstract 2
- 230000001172 regenerating effect Effects 0.000 abstract 1
Classifications
-
- 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
- H04L25/4917—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 multilevel codes
- H04L25/4923—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 multilevel codes using ternary codes
- H04L25/4925—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 multilevel codes using ternary codes using balanced bipolar ternary codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Dc Digital Transmission (AREA)
- Small-Scale Networks (AREA)
- Emergency Protection Circuit Devices (AREA)
- Optical Communication System (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
An alphabet code converter (ACW1) arranged at the transmitting end of the digital transmission system generates output signals in accordance with the code alphabets provided, which signals only have a certain maximum number of equal-valued elements, for example zero bits. For the purpose of no-address fault location, control signals are provided which cannot occur during normal operation and which have a relatively large number of identical code elements following one another directly. For this reason, an alphabet code converter (ACW1) is proposed which can be switched (S1) during the fault locating operation and which generates a ternary loop closure signal from a binary loop closure signal. The system can be used for digital transmission links, particularly for PCM signals, having a relatively large number of regenerative repeater stations. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2649161A DE2649161C3 (en) | 1976-10-28 | 1976-10-28 | Digital transmission system with an alphabet code converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1543135A true GB1543135A (en) | 1979-03-28 |
Family
ID=5991783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB42189/77A Expired GB1543135A (en) | 1976-10-28 | 1977-10-11 | Digital signal transmission systems and to alphabet code converters for such systems |
Country Status (16)
| Country | Link |
|---|---|
| AT (1) | AT355098B (en) |
| AU (1) | AU506477B2 (en) |
| BE (1) | BE860285A (en) |
| BR (1) | BR7707157A (en) |
| CH (1) | CH627556A5 (en) |
| DE (1) | DE2649161C3 (en) |
| DK (1) | DK154250C (en) |
| ES (1) | ES463650A1 (en) |
| FR (1) | FR2369748A1 (en) |
| GB (1) | GB1543135A (en) |
| IT (1) | IT1086933B (en) |
| MX (1) | MX144035A (en) |
| NL (1) | NL174318C (en) |
| NO (1) | NO145289C (en) |
| SE (1) | SE414441B (en) |
| YU (1) | YU258177A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2902020C3 (en) * | 1979-01-19 | 1982-08-26 | TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Method and circuit arrangement for the transmission of fault location commands in digital transmission systems |
| FR2557404B1 (en) * | 1983-12-23 | 1986-10-17 | Wilbrod Jean Hubert | METHOD FOR TRANSMITTING LOW-RATE INFORMATION OVER DIGITAL LINK IN SERVICE AND COMMUNICATION FACILITY COMPRISING APPLICATION |
| GB2183971B (en) * | 1985-12-05 | 1989-10-04 | Stc Plc | Data transmission system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2060989A5 (en) * | 1969-12-24 | 1971-06-18 | Sits Soc It Telecom Siemens |
-
1976
- 1976-10-28 DE DE2649161A patent/DE2649161C3/en not_active Expired
-
1977
- 1977-09-29 AT AT694477A patent/AT355098B/en not_active IP Right Cessation
- 1977-10-11 GB GB42189/77A patent/GB1543135A/en not_active Expired
- 1977-10-13 CH CH1253477A patent/CH627556A5/en not_active IP Right Cessation
- 1977-10-17 MX MX170968A patent/MX144035A/en unknown
- 1977-10-19 FR FR7731503A patent/FR2369748A1/en active Granted
- 1977-10-21 NO NO773619A patent/NO145289C/en unknown
- 1977-10-24 SE SE7711943A patent/SE414441B/en not_active IP Right Cessation
- 1977-10-25 IT IT28948/77A patent/IT1086933B/en active
- 1977-10-26 BR BR7707157A patent/BR7707157A/en unknown
- 1977-10-27 YU YU02581/77A patent/YU258177A/en unknown
- 1977-10-27 AU AU30108/77A patent/AU506477B2/en not_active Expired
- 1977-10-27 DK DK477677A patent/DK154250C/en not_active IP Right Cessation
- 1977-10-28 NL NLAANVRAGE7711914,A patent/NL174318C/en not_active IP Right Cessation
- 1977-10-28 ES ES463650A patent/ES463650A1/en not_active Expired
- 1977-10-28 BE BE182196A patent/BE860285A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AT355098B (en) | 1980-02-11 |
| ATA694477A (en) | 1979-07-15 |
| ES463650A1 (en) | 1979-01-01 |
| FR2369748A1 (en) | 1978-05-26 |
| MX144035A (en) | 1981-08-19 |
| AU506477B2 (en) | 1980-01-03 |
| BR7707157A (en) | 1978-07-18 |
| FR2369748B1 (en) | 1982-03-26 |
| NL7711914A (en) | 1978-05-03 |
| DK154250C (en) | 1989-03-28 |
| NO145289C (en) | 1982-02-17 |
| DK154250B (en) | 1988-10-24 |
| CH627556A5 (en) | 1982-01-15 |
| DE2649161A1 (en) | 1978-05-03 |
| YU258177A (en) | 1982-06-30 |
| AU3010877A (en) | 1979-05-03 |
| NL174318C (en) | 1984-05-16 |
| BE860285A (en) | 1978-02-15 |
| NO773619L (en) | 1978-05-02 |
| DK477677A (en) | 1978-04-29 |
| SE7711943L (en) | 1978-04-29 |
| NO145289B (en) | 1981-11-09 |
| NL174318B (en) | 1983-12-16 |
| DE2649161C3 (en) | 1979-09-06 |
| DE2649161B2 (en) | 1979-01-04 |
| IT1086933B (en) | 1985-05-31 |
| SE414441B (en) | 1980-07-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |