CA2019649A1 - Digital data transmission system - Google Patents
Digital data transmission systemInfo
- Publication number
- CA2019649A1 CA2019649A1 CA 2019649 CA2019649A CA2019649A1 CA 2019649 A1 CA2019649 A1 CA 2019649A1 CA 2019649 CA2019649 CA 2019649 CA 2019649 A CA2019649 A CA 2019649A CA 2019649 A1 CA2019649 A1 CA 2019649A1
- Authority
- CA
- Canada
- Prior art keywords
- data
- sub
- communications network
- systems
- overate
- 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
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
A digital data transmission system comprises at least two data sub-systems connected to respective data termination units interconnected via a time-division multiplexed communications network having an internal system clock. The DTUs are part of the communications network and have their internal timing slaved to the network. The data sub-systems have independent timing from the communications network and therefore data sub-systems clocks will be liable to drift relative to the DTU clocks. The incomin data stream is applied to a FIFO memory, whose state is used to identify overate or underate conditions in the the transmitting sub-system. Clock adjustment data is transmitted with communications data in a superframe consisting of n frames of m bits each (where n, m are integers), and the received data steam is adjusted in accordance with said clock adjustment data to compensate the received bit stream for overate or underrate conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2019649 CA2019649C (en) | 1990-06-22 | 1990-06-22 | Digital data transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2019649 CA2019649C (en) | 1990-06-22 | 1990-06-22 | Digital data transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2019649A1 true CA2019649A1 (en) | 1991-12-22 |
| CA2019649C CA2019649C (en) | 2000-05-02 |
Family
ID=4145313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2019649 Expired - Fee Related CA2019649C (en) | 1990-06-22 | 1990-06-22 | Digital data transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2019649C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003056436A1 (en) | 2001-12-21 | 2003-07-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Rate adaptation within a tdm switch using bit stuffing |
-
1990
- 1990-06-22 CA CA 2019649 patent/CA2019649C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003056436A1 (en) | 2001-12-21 | 2003-07-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Rate adaptation within a tdm switch using bit stuffing |
| EP2169858A2 (en) | 2001-12-21 | 2010-03-31 | Telefonaktiebolaget L M Ericsson (Publ) | Arrangement for transmission of bit streams through a data node |
| EP1459186B1 (en) * | 2001-12-21 | 2010-09-15 | TELEFONAKTIEBOLAGET LM ERICSSON (publ) | Rate adaptation within a tdm switch using bit stuffing |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2019649C (en) | 2000-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1289249C (en) | Parallel transmission system | |
| KR940012969A (en) | Network for isochronous-source data with frame structure | |
| DK496985A (en) | BROADBAND DIGITAL TRANSMISSION PLANT | |
| CA2302370A1 (en) | System and method for high-speed, synchronized data communication | |
| RU93054764A (en) | COMMUNICATION SYSTEM FOR CONNECTING WITH A NETWORK OF AVAILABLE DATA SYNCHRONIZED WITH VARIOUS SPEEDS | |
| UA26436A (en) | METHOD OF TRANSMISSION OF DIGITAL BROADBAND SIGNAL BY LIECHS OF THE HIERARCHY TRANSMISSION SYSTEM | |
| CA2239852A1 (en) | Timing reference for scheduling data traffic on multiple ports | |
| US20030194035A1 (en) | Method to synchronise data and a transmitter and a receiver realising said method | |
| JPH0738545A (en) | Smoothing output clock signal extraction | |
| CA1218773A (en) | Apparatus and method for providing a transparent interface across a satellite communications link | |
| US6532243B1 (en) | Virtual time loop | |
| AU1953592A (en) | Sdh data transmission timing | |
| CA1040761A (en) | Data transmission network with independent frame phase | |
| US4270203A (en) | Timing adjustment circuit for digital switching | |
| CA2330012A1 (en) | Hub port without jitter transfer | |
| US4105869A (en) | Time-division multiplex digital transmission system with intermediate stations adapted to transit insert and extract digital channels | |
| CA2019649A1 (en) | Digital data transmission system | |
| US5524107A (en) | Multiport multidrop digital system | |
| GB2216366A (en) | Timing generator | |
| IE842334L (en) | Data and signalling time slot transfer | |
| US4769809A (en) | Method of and circuit arrangement for through-switching broadband digital signals without phase jump in a synchronous broadband communication network | |
| CA2120697A1 (en) | Pair Division Multiplexer for Digital Communications | |
| GB1510015A (en) | Digital data signal transmission systems | |
| CA2037488C (en) | Communication terminal equipment | |
| AU683545B2 (en) | Method for transmitting control information over an HDSL transmission link |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |