High-Capacity Transmission Network (DWDM)

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High-Capacity Transmission Network (DWDM)
By Robert Danon
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Todays typical Enterprise Network
MAN/WAN
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(No Transcript)
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Challenges of Todays Telecom Networks

• 1. Constant increasing demand for Bandwidth
  Capacity to provide the services required by
  customers
• No bottlenecks (same performance in the WAN as in
  the LAN)

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Challenges of Todays Telecom Networks

• Enterprise Customers
• Use of High Bandwidth Capacities for
• Manufacturing applications
• Large file transfers
• Multimedia (videoconferencing, image/video
  broadcasting,..)
• Internet/Intranet applications
• Storage Area Networks
• Interconnections between different offices
  (Centralization of the services)
• Service Providers
• High-Capacity trunking services between
  facilities
• Central Regional Offices
• Hosting Centers
• POPs,...

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Challenges of TodaysTelecomNetworks

• 2. Deploying Integrating diverse Transport
  Technologies in one physical structure
• Transport technologies
• Ethernet (10/100/Giga)
• SDH, ATM, FR
• ESCON, FICON, Fibre Channel,

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How to provide more Bandwidth Capacity?

• 1. Use/Lay more fiber links Transmission
  Equipment
• Use of traditional TDM Transport Technologies
  (ex. SDH)
• Total available Bandwidth remains limited to the
  Capacity of the Network Equipments of the
  Backbone (ex. STM-16)
• Data transmission achieved by means of a single
  beam of white light
• As maximum capacity is reached, need to light
  another beam on another fiber link
• Expensive solution

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How to provide more Bandwidth Capacity? (2)
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How to provide more Bandwidth Capacity? (3)

• 2. Upgrade to Higher-Speed TDM Network Equipments
• Simple extension of the Backbone Capacity
• 2,5 Gbps (STM-16) to 10 Gbps (STM-64)
• 40 Gbps ??? (Next step in SDH Hierarchy)
• Total available Bandwidth remains limited to the
  Capacity of the Network Equipments.
• Data transmission achieved by means of a single
  beam of white light
• As maximum capacity is reached, need to light
  another beam on another fiber link
• Expensive Solution

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How to provide more Bandwidth Capacity? (4)

• DENSE WAVE DIVISION MULTIPLEXING
• Fiber-Optic Transmission Technique using light
  wavelengths to transmit Data Flows

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DWDM

• Principle
• Split the same beam of white light by frequency
  (colors) into separate wavelengths
• Assign incoming signals to a specific
  lambda(Color)
• Multiplex the result on a single fiber link

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DWDM (2)

• Each resulting wavelength can be considered as a
  Virtual Fiber Link and is totally independent
  from the others.
• Each Lambda is provisioned controlled by a
  frequency-specific laser
• Each lambda can carry the same total amount of
  data (2,5/10 Gbps)

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DWDM (3)

• Each lambda is Protocol Independent (bit-rate
  format)

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DWDM (4)
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DWDM Advantages

• Scalability
• Grow-as-you-go Infrastructure
• DWDM infrastructure is designed to provide a
  graceful network evolution for service providers
• Huge Bandwidth Capability
• Transport Capacity of one Lambda is at least 2.5
  Gbps
• Flexibility
• Capacity can be expanded in any portion of the
  network (no other technology can offer this)
• Versatility
• Only mean for service providers to integrate the
  existing diverse transport technologies into one
  physical infrastructure

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DWDM Advantages (2)
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DWDM Advantages (3)

• More efficient use of the intrinsic capacity of
  the fiber network
• Less equipment investments
• Bottlenecks suppression
• Same performance in the WAN as in the LAN

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DWDM Advantages

• Possibility to lease individual wavelengths to
  High-Use Customers
• Possibility for centralization of IT
  Infrastructure, applications and services
• Servers (E-mail, Office, Data Bases,.)
• Internet (costs, protections/firewalls,.)
• Application Development
• Disaster Recovery Strategy
• Dedicated High-Speed Trunks toward DR Centers
• Better Cost Control

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DWDM Services

• Basic Level Unprotected Point-to-Point
  Connection
• 2.5 or 10 Gbps
• Customers keep the choice to maintain manage
  the NTEs
• Level 2 Protected Services
• Geographical protection through diverse-routed
  fiber connections between 2 service points
• Customers keep the choice to maintain manage
  the NTEs
• Level 3 Managed Wavelength Services
• The Service Provider manages the DWDM connection
  and the NTEs on either end
• Level 4 Custom Build Wavelength Services
• Includes managed network services a managed
  wavelength transport solution to run multiple
  protocols

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International Backbone

• B-TELECOM
• 3500 km Fibre-Optic Infrastructure along the
  railway lines
• National Coverage
• Installed cables up-to borders of all adjacent
  countries
• Belgium Crossroad
• Easy interconnects country-to-country with
  foreign local operators
• Possibility to extend our Backbone Network
  outside Belgium
• 2 Countries connected today
• Luxemburg
• France

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B-Telecom Fiber Backbone
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Our DWDM proposal towards Luxembourg

• Origin
• Few active players on the B - L axis
• Demands for high-bandwidth transmission capacity
  from entreprises operating in sectors as
• TV Broadcasting
• Operators / ISP
• IT
• Finance
• Limited fibre infrastructure for commercial
  purposes

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Our Service proposal towards Luxembourg

• Partners
• PT Lux Transmission Services
• Cegecom Transmission Services
• e-BRC Collocation Disaster Recovery

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Our proposal towards Luxembourg

• PT Lux
• National Coverage
• Redundant Physical interconnect
• 2 routes
• BRU - LV - LG - GOUVY - LUX
• BRU - NAM- ARL- ATHUS - LUX
• 2 active Rings today
• SDH STM-16
• DWDM
• Voice, Data, Internet

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Our proposal towards Luxembourg

• Cegecom
• National Backbone
• Physical interconnect
• 2 routes
• BRU - LV - LG - GOUVY - LUX (e-BRC)
• BRU - NAM- ARL- ATHUS - LUX
• 1 active Ring today
• SDH
• Voice, Data, Internet

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Our proposal towards Luxembourg

• E-BRC
• Co-location Services
• Disaster Recovery Solutions

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BeLux DWDM Network Implementation
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National DWDM Network Implementation