Final Report (2) Chapter 5 Mid-Term Development Plan Consolidation Program Although the core networks connecting main cities and rural areas have been made mainly through the microwave radio links, use of optical fiber cable links are proceeded. The core network program in future is as shown in Figure 5.2-4. As shown in the figure, the core networks are proceeded with the assistance through China, Korea and so on. Presently, the core networks are taking the star construction, however, recently, it start taking two route diversity configuration partly. The core networks give very important networks connecting with main cities and also with main local cities and it may be one of the subjects to proceeding the double route plan. In this respect, through landing at several points, the international submarine cable extending southward may be utilized as a domestic core network, the double route plan will be realized. Referring the Figure 5.2-5, in this southern area of Myanmar, forming narrow area extending north-south area where installing double route plan seems to be very difficult. Therefore such secondary use of the International Submarine Cables may be an efficient utilization of the international submarine cables. To Overseas Source: Provided by MPT Figure 5.2-5 Use of the International Submarine Cable for Domestic Purpose 5.2.4 Metro Network (1) Present Status and Subject to be solved The metro network is the networks to connect the switching stations each others, they are found only in Yangon, Naypyitaw and Mandalay. The metro-networks are connected to the access networks to provide the intra-city communication and also connected with the backbone network each other in the main switching stations for inter-city communications. Table 5.2-2 shows the present situations of the metro networks in city of Yangon. As found in this table, there are a number of sections where no spare fiber core is available. As it is, the metro-networks are having problem of shortage of capacity. Installation and maintenance control of communication equipment of the metro-networks are provided by the Auto Telephone Department. 5-10