A telecom transmission system connects broadband access, optical transmission, and metro core long-haul networks to ensure efficient data communication. Broadband access is provided through various technologies like xPON, LTE, and Ethernet, while optical transmission involves PTN (Packet Transport Network) and OTN (Optical Transport Network) for handling high-speed data. The metro core and long-haul transmission use Dense Wavelength Division Multiplexing (DWDM) and OTN to support large-scale data transmission over long distances. This system ensures secure, high-speed, and reliable communication by connecting access points, transmitting data over fiber-optic networks, and enabling efficient long-haul data transport.