3.5. light power system:• Goals and design principles:• The work is preschool-language centre, therefore need a good communications system for schools.• Design a system of internal information, including phone systems, data, and intercom to the Headquarters after the need to connect the service to the departments, then just connect in main trunk wardrobes (MDF) or just connect at the medial trunk wardrobes (IDF).• Avoid immunity to signal other electric service information headquarters.• Coordinating the various information services such as internet, phone, cable tv, ... in order to save the trough and pipe line.• Design:• The telephone system:• Information service provider (ISP) under the underground buried pipes PVC 34 mm, on the main trunk 60Nos MDF Cabinet placed at the ground floor.• MDF cabinet from the floor, installed according to the vertical axis of the information to the IDF 10Nos floor by cable 10 0.5 mm2, each pair of cabinets a fiber.• From IDF closet of each floor, leading the information cable 2 to gut the information of each connector box, departments.• Backup power Source for the MDF is the UPS 2kVA 01 contains the specifications (voltage, current, frequency, ...) in accordance with the technical requirements of the system.• Internet system:• Information services provider under the pipe buried 34 mm PVC tube to the device receiving the signal processing and the internet Router located at ground floor.• Through the 8port Switch to Hub Switch level Cat 5e.• Backup Power Sources have the Switch 8port 2kVA UPS ministries had the 1st is the specifications (voltage, current, frequency, ...) in accordance with the technical requirements of the system.• Tv system:• Tv service provider of underground PVC pipe buried 34 mm to amplifier placed at the ground floor, through the split to give the signal to the Tv Antenna socket in the floor by RG6 cable.
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