Applicable field ① Intelligent Transport System. ② Metro Distribution Network of Internet Service Providers. ③ Security digital image telecommunications network. ④ Metro enterprise network. ⑤ A local autonomous entity network. ⑥ Network Apartments communications network. ⑦ Security Network. ⑧ Analog and data communications coexistence. WDM-EPORN can solve all problems. ☞ It can transmit data at a maximum speed of 100Mbps to home. ☞ It's interactive DVD class that can live broadcast. (computer, TV) ☞ It can transmit the highest images for cyber education. ☞ It can serve real-time traffic information and flight information. ☞ It can solve each metro network problems. ☞ It can admit all networks. ☞ It's lower price than other company's equipment. ☞ It's the most safety because it is a structure of ring. ☞ It's the best equipment in the world.