FR2455824A1 - Device which detects errors in digital transmitted signals - by finding faults in successive sub periods of transmission and providing overall fault signal if fault occurs in any subdivision - Google Patents
Device which detects errors in digital transmitted signals - by finding faults in successive sub periods of transmission and providing overall fault signal if fault occurs in any subdivisionInfo
- Publication number
- FR2455824A1 FR2455824A1 FR7911232A FR7911232A FR2455824A1 FR 2455824 A1 FR2455824 A1 FR 2455824A1 FR 7911232 A FR7911232 A FR 7911232A FR 7911232 A FR7911232 A FR 7911232A FR 2455824 A1 FR2455824 A1 FR 2455824A1
- Authority
- FR
- France
- Prior art keywords
- fault
- overall
- circuit
- transmission
- output
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
Abstract
The device is for detecting errors in pulse code modulated telephone transmission and comprises an elementary fault detection circuit (1) such as a counter which detects a fault in a received digital signal(s) during a sub-period (T/R), the circuit being reset at the beginning of each sub-period by a clock signal (h) and having an output in one of the logic states depending on the presence or absence of a fault. The circuit output is applied together with the clock signal to a series of memory circuits such as bistables (21,22,...2n) whose outputs are coupled to an overall fault detection circuit (4) and an overall memory circuit (5), the respective memory circuits indicating the fault state of each sub period. If the logic state of one output of the memory circuits indicates the presence of a fault the output of the overall fault detection circuit (4), conveniently on OR gate, indicates an overall fault which is recorded in the overall memory circuit (5) to show that a fault occurred during transmission or reception of the signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7911232A FR2455824B1 (en) | 1979-05-04 | 1979-05-04 | DEVICE FOR DETECTING FAULT IN TRANSMISSION OF A DIGITAL SIGNAL |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7911232A FR2455824B1 (en) | 1979-05-04 | 1979-05-04 | DEVICE FOR DETECTING FAULT IN TRANSMISSION OF A DIGITAL SIGNAL |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2455824A1 true FR2455824A1 (en) | 1980-11-28 |
FR2455824B1 FR2455824B1 (en) | 1986-02-21 |
Family
ID=9225018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7911232A Expired FR2455824B1 (en) | 1979-05-04 | 1979-05-04 | DEVICE FOR DETECTING FAULT IN TRANSMISSION OF A DIGITAL SIGNAL |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2455824B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2359553A1 (en) * | 1976-07-22 | 1978-02-17 | France Etat | DIGITAL TRANSMISSION DUAL CHANNEL SYSTEM |
DE2738836B1 (en) * | 1977-08-29 | 1978-11-16 | Siemens Ag | Monitoring of digital signals |
FR2410919A1 (en) * | 1977-12-05 | 1979-06-29 | Telecommunications Sa | PROCESS FOR ASSESSING THE QUALITY OF A DIGITAL HERTZIAN BEAM |
-
1979
- 1979-05-04 FR FR7911232A patent/FR2455824B1/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2359553A1 (en) * | 1976-07-22 | 1978-02-17 | France Etat | DIGITAL TRANSMISSION DUAL CHANNEL SYSTEM |
DE2738836B1 (en) * | 1977-08-29 | 1978-11-16 | Siemens Ag | Monitoring of digital signals |
FR2410919A1 (en) * | 1977-12-05 | 1979-06-29 | Telecommunications Sa | PROCESS FOR ASSESSING THE QUALITY OF A DIGITAL HERTZIAN BEAM |
Non-Patent Citations (1)
Title |
---|
EXBK/74 * |
Also Published As
Publication number | Publication date |
---|---|
FR2455824B1 (en) | 1986-02-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |