Final Report Chapter 7 Outline of Scope of Works (2) Necessity (Relevance) In order to improve the situation described above and build a stable network toward future privatization, MPT will have to install more fiber optic cables. From Table 5.2-8 the number of data subscribers in the three metro-cities is estimated at 9 million. As more than a dozen ring configurations are planned for the metro network in the three metro-cities, an average 500,000-1 million subscribers per ring can be accommodated. The “communication capability” is greatly affected by internet (data) traffic. Based on Table 5.2-7, the average data communication speed per user is approximately 14kbps (or more precisely 13.89), so the access system will be 7-14Gbps per ring. The metro network will also have a ring configuration, so it will be necessary to secure fourfold capacity, the same as the backbone network. The required capacity, therefore, is 28-56Gbps. In addition, the metro network is used not only for access but as a relay transmission route and the percentage varies from place to place. On non-relay rings, the access capacity becomes the required capacity as it is. On the other hand, on rings with many relays, if relay is three times access, the required capacity might be as high as 170Gbps in some places. Based on the above, the required capacity of the metro network varies greatly from place to place and is largely in the range of 30-170Gbps. To convert this average value into the design value, 1.5 times means that the capacity must be in the region of 45-250Gbps. (3) Scope of upgrade The scope of the upgrade plan is shown in the planned network line route in each city as follows. (a) Figure 7.1-9 Yangon Metro Network Expansion (b) Figure 7.1-10 Naypyitaw Metro Network Expansion (c) Figure 7.1-11 Mandalay Metro Network Expansion 7-15