Final Report Chapter 5 Mid-Term Development Plan (2) Consolidation Program The backbone network linking Yangon, Naypyitaw and Mandalay should be a basic network that corresponds to the frame in the building works, therefore, it should be networks that are of a high capacity and a high reliability. At present these backbone networks are composed of a microwave radio link and two routes of the fiber-optic cable links as shown in Figure 5.2-1 and in Figure 5.2-2 (A-route and B-route by fiber optic cables). Among these two routes of the fiber-optic cable links, the route along the highway (B-route in Figure 5.2-2) will be scheduled to be provided the wave-length division multiplex (WDM) equipment having 30Gbps bandwidth, which is scheduled to be completed by the end of December 2013, thus strengthening somehow the capacity of the backbone link. MPT plans to provide two more new routes in addition to the existing two routes (C route and D route in Figure 5.2-2) thereby to complete “optical ring construction”. Provided that when this plan be completed, the backbone network will be completed to have four routes of the fiber-optic cable system. Thus these three big cities will have been connected through the fiber optic cables of more the 200 cores. At present, the fiber optic multiplex equipment, available is able to transmit 100Gbps per unit wave length, therefore, utilizing 100 wave lengths per fiber core and in case, all of the cores are equipped the multiplex equipment, then, the total capacity will becomes 2000Tbps or more, and this fiber-optic cable route will be usable for very long period to come. In addition, considering possible progress in the fiber-optic cable’s technology, the total capacity may increase further. However, this multiplex transmission equipment should be installed and expanded according to the demand. Also to be expected, is to become four route composition, thereby to improve the system reliability. From now on, it is necessary to introduce switchover equipment or routers, according to request within the system. 5.2.3 (1) Core Network Present Situation and Subject to be solved The core network including the backbone networks indicates the toll transmission routes connecting every cities each other within Myanmar, and provided mainly by microwave radio links at present. As shown in Figure 5.2-3, the microwave radio links are functioning as an important role so far. To these core networks, the local telephone exchanges (approximately 900 in number) are connected and reached anywhere in Myanmar. The core networks may become annoyed usually due to shortage of networks as in the case of the backbone networks at least. In the case of the microwave radio links, there is a limit for expansion of the capacity, use of the optical fiber cable system should be utilized. Figure 5.2-4 shows the expansion plan of the fiber-optic cables by MPT. Installation and the maintenance control of the communication facilities of the core networks are furnished by the Long Distance Communications. 5-7