TRANSMISSION SECTION


PDH-SDH TRANSMISSION & MULTIPLING

 

 

The Optical fibre is modifying in depth the architecture of transmission networks . 

New optical technologies   are appearing with new high speed new multiplexing schemes : SDH, SONET.

 Optical SDH self-healed loops are spreading rapidly in the transmission long haul transmission network, but also in the distribution network MAN and in the subscriber access loops.

This course is intended to present these new optical transmission technologies but also the traditional PDH multiplexing, which is still used to provide lower speed transmission and multiplexing.  

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Course Objective

Provide the basic technical knowledge on: 

·         PDH multiplexing

·         Transmission on Optical fibre

·         SDH/SONET Multiplexing

·         SDH/SONET Optical loops and networks

 

Audience 

Any person, with a technical profile, wishing to improve its knowledge in transmission technologies

Duration: 1 day

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Table of Contents

 

PDH multiplexing

· PDH hierarchy: E1-E2-E3-E4, DS1/T1-DS3/T3

· The standards: G703-704

· Multiplexing structures: E1, T1, ( IT16 sub-multiplexing) , E3, T3,  E4

· Operation, administration and maintenance: CRC4

· PDH Equipments overview: multiplexers, cross-connects

 

Optical Transmission

· Optical Fibre characteristics, single or multi-mode, standards UIT

· Optical transmission Equipments, transmission performances

 

SDH/SONET NETWORKS

· PDH multiplexing limitations

· LSDH/SONET hierarchy, the ITU standards

· Multiplexing structures and framing: RSOH, MSOH, POH

· SDH Network basic elements : repeaters, multiplexers, ADM, Cross Connect

· SDH Network architectures and topologies: point to point, Rings

· Operation, administration and maintenance: F1, F2, F3 flows, MIB, performances

· SDH Protection: multiplex, path, and optical ring.

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WDM TRANSMISSION & MULTIPLEXING

 

 

Optical transmission combined with SDH/SONET TDM multiplexing has drastically increased the transmission bit rate in backbone and metropolitan networks.

However the SDH technology is currently limited to 2.5/10 Gbit/s on a single optical fibre.  Higher bit rates are required in the long haul networks to support the constantly increasing Internet traffic.

 
A new multiplexing technology has been invented and is being deployed: optical multiplexing, so called WDM (Wavelength Division Multiplexing)
  

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Course Objective
 

Provide the basic technical knowledge on:

· WDM transmission and multiplexing principles

· WDM Network Architecture

· WDM Equipments : amplifiers, multiplexers, OADM, Cross connect

· Operation, administration and maintenance

 

Audience 

Any person, with a technical profile, wishing to improve its knowledge in transmission technologies

Prerequisite
basic knowledge on SDH/SONET

Duration : 1 day

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Table of Contents

 

 Fiber Optics suitable for WDM

· Critical Optics Parameters for WDM

· Optical Fibres for WDM – the ITU standards

· Upgrading of existing Fibres

 

WDM multiplexing technology

· SDH Limitations, Very High Speed transmission requirements 

· WDM multiplexing Structure, the ITU standards

· Operation, administration and maintenance: supervision channel, MIB

 

WDM Networks

· WDM Network  Elements: amplifiers, multiplexers, OADM, cross connect

· WDM Network Topologies: ring, mesh, star

· Protection Techniques in WDM 

· Operation, administration and maintenance at network level
· WDM-SDH combined optical network architecture

· Other WDM network uses: Gigabit Ethernet over WDM, IP/MPLS over WDM

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XDSL LOCAL LOOP & UNBUNDLING REGULATION

 

The data transmission rate  on  telephone lines has been so far limited, for the PSTN to 56 Kbit/s, for the ISDN  to 128 Kbit/s. It starts to be too slow rate for Internet access, taken into account the richer content of Web sites.
 
The new XDSL Technologies drastically increase the transfer rate on telephone lines up to 2 Mbit/s currently, and rather soon to 10 Mbit/s.
As a consequence the MAN distribution part of the telephone network has to be redesigned to cope with a 10-fold data rate increase. New ATM and/or IP optical networks are being used for that purpose.
Another consequence is to change the deregulation rules in the telephone networks and to set a new regulation: the local loop unbundling.

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Course Objective

Provide the basic technical knowledge on: 

·         Local loop unbundling regulations

·         XDSL Transmission and related equipements

·         ATM & IP distribution XDSL networks

·         XDSL applications

 

Audience 

Any person, with a technical profile, looking for training in Local Loop XDSL transmission technologies

Prerequisite: Basic Transmission knowledge

Duration: 2 days

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Table of Contents

 

Introduction

·    High speed access end user’s requirements : professional and consumer

·    Applications: Internet, Intranet, Extranet, Multimédia

·    High speed access networks general Architecture

·    The different local loop technologies : cable, fixed wireless, XDSL

 

Local Loop Unbundling

·    Unbundling regulations in France

·    The different options: total, partial and virtual circuit unbundling,

·    ART regulation

·    Unbundling in Europe and USA

 

France Telecom Unbundling Offer

·    Local loop total access

·    Local Loop shared access

·    Virtual circuit Access : Turbo DSL and Connect ATM

 

XDSL Transmission characteristics

·    Telephone Lines technical characteristics and their consequences on XDSL

·    Description of XDSL transmission techniques : ADSL, SDSL, VDSL

·    XDSL Performances on telephone lines

·    XDSL modems and DSLAMs

 

XDSL distribution Network: ATM

·   ATM distribution network Architecture

·   ATM statistical multiplexing, ATM QoS (CBR, VBR, UBR)

·   Example: The TURBO DSL service from France Telecom

·   Design and implementation solution : DSLAM, ATM switch, CPE

 

XDSL distribution Network: IP

 ·   IP distribution network Architecture

 ·   Internet XDSL Access protocols : PPPoA, PPPoE, L2TP

 ·   Example: The TURBO IP service from France Telecom

 ·   Design and implementation solution: BAS, CPEs

 

XDSL Products and Services on the Market

·    XDSL products review: DSLAM, Modems, Routers, PC Software

·    Telcos and ISP service offering review

 

XDSL Applications

·    Leased Lines replacement: Access to FR, IP VPN networks

·    IP remote Access : Internet, Intranet

·    VoDSL : Voice over DSL

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