Useful DWDM tips

Fixed Networks
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1

  1. Points to be considered in DWDM design

    Availability
    Cost
    Traffic growth
    Bandwidth
    Capacity
    Spectral efficiency
    Protection scenarios
    Transmission impairments ( Linear & non linear effects )

  2. DWDM main bulding blocks

    OTM ( Tributary , Line , XC , Transponder )
    REG
    FOADM
    ROADM / TOADM
    Optical Amplifiers ( EDFA , RAMAN , hybrid )
    Interleavers
    OSC boards
    DCM
    Filters ( MUX , Demux )

  3. Network levels

    Access
    Aggregation
    Core

  4. Network topologies

    Star
    Mesh
    Ring ( intersected , Tangent )
    Linear

  5. Bands

    C
    L

  6. Fiber to be used

    DSF G653
    NDSF G652
    NZDSF G655
    G654

  7. Tx impairments

    Attenuation
    Dispersion ( chromatic & polarisation )
    FWM
    SPM
    XPM
    Kerr effect

  8. Link power budget

    OSNR
    BER
    Rx sensitivity
    Rx overload

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