1. the nework solutions Description1.1. GeneralThis proposed network solution intends to provide VTN the metro network in Hanoi city for the VTN required network topology as:

And the Traffic demand as:

In order to give VTN the network solution with the technical advantages, the certain technologies listed below are proposed in Alcatel-Lucents offer:

1830PSS to compose the WDM system; 1850 Transport Service Switch as the multi-service aggregation; End-to-end management

The sections below give the detail description about the network/node configuration and design.

1.2. Network ConfigurationThe network configuration of Hanoi metro network consists of the 1830PSS DWDM system with WSS ROADM enabled from day 1 and 1850TSS320/160 as the aggregation shelf for STM-16/4/1, GE and E3 (E3 on 1662SMC drop shelf) as showing with the diagram below:

ROADMROADMROADMROADMROADMROADMROADMROADMROADMROADM

The offered network solution is to provide the 40Gbps channels for the initial traffic implementation in day 1. The network design clarified in the following sections is based on the G.652 fiber as the main solution or the G.655 fiber as the option solution. The applied fiber parameters of both fiber types are listed below as VTNs specification:G.652s parameters:- Fibre Loss (including Splice Loss): 0.25dB/km at 1550nm- Connector Loss: 0.5dB- Chromatic Dispersion Coefficient: smaller than 18ps/nm.km

1.3. Node ConfigurationThe stations are implemented with the architecture: Required Booster (with the corresponding DCM module) on the DWDM line according to per power budget design; The Mux/Demux for the add/drop channels; The 40G TMUX(4x10G) tunable transponder cards for local STM-64/10GbE service and STM-64/10GE trunk of the 1850TSS320/160The multi-service aggregation system (1850TSS320/160) is offered collocated with the 1830PSS with: Full redundant matrix, clock and power cards; STM-64/10GE interface card for to serve the STM-16/4/1, GbE traffic and the E3 (from the 1626SMC drop shelf). System is linked with the 1830PSS on the STM-64/10GE level through the 40G TMUX(4x10G).

The node configuration with the 1830PSS and the 1850TSS320 on the stations is depicted with the following diagrams:(Note: Please refer to the Section 1.3- Equipment Face Layout and the bill of material list for the real quantity of the configured interfaces, transponder cards, type of the amplifiers and so on.) ROADM Network DesignThe proposed main solution is based on 40Gbps channels for the day 1 deployment. The provided ROADM design can support up to 44x40G channels in the network.This section intends to introduce in detail the amplifier and the DCM configuration regarding each link and station, and the proposed channeling plan as well.1.3.1. Amplifier and DCM Types in the offerThe supported amplifier types on 1830PSS are: ALPHG: Low Power EDFA, 9 to 29 dB Gain, 17 dBm total output power, with two stages to insert the DCM module in the middle; AHPHG: High Power EDFA, 13 to 33 dB Gain, 20 dBm total output power, with two stages to insert the DCM module in the middle; The supported DCM modules on 1830PSS are:Low-Loss DCM Module TypesNorminal CD CompensationInsertion Loss

DCM350 ps/nm2.2

DCM584 ps/nm2.4

DCM10167 ps/nm2.7

DCM15251 ps/nm3.1

DCM20334 ps/nm3.4

DCM25418 ps/nm3.7

DCM30501 ps/nm4.1

DCM40668 ps/nm4.8

DCM50835 ps/nm5.5

DCM601002 ps/nm6.1

DCM701169 ps/nm6.8

DCM801336 ps/nm7.5

DCM901503 ps/nm8.2

DCM1001670 ps/nm8.9

DCM1202004 ps/nm10.2

Supply the DWDM system for the Metro Link in Hanoi

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Alcatel-Lucent Offer Date: November 2009Page 9/9All rights reserved. Passing on and copying of this document, use and communication of its contents not permitted without written authorization.1.3.2. Fibre Characteristics of G.652 fibers

1.3.3. Design result of G.652 fibers (OSNR and Residual Dispersion of each path)

Design result extracted from our network dimension tools is enclosed in Section 1.5 of Volume B.

1.3.4. Channeling PlanThe main offer is based on the channeling plan with 40Gbps channels, as the following table for the VTN demanded traffic.

VTN MDHCGY&VMSVNP MDHVMS GBTVMS NPSVNP LQTVDC CHABD DTHVDC DTHVTN C2Ch1Ch2Ch3Ch4Ch6Ch7Ch9Ch10Ch11Ch12Ch13Ch15Ch5Ch8Ch14Pass through 10G traffic in order to save # of 40G wavelengthsVTN C2

1.3.5. Service Protection

Respecting to VTNs requirement in the specification documentation and the clarification paper about the service protection: 1+1 interfaces/cards are equipped for STM-64, 10GbE, STM-16, STM-4; 1+N interface is equipped for E3/D3; Working lambda and protection lambda along the different direction are allocated for each traffic channel as the channeling plan in the previous section; The protection switch will be operated on the connected client equipment