The EPON OLT FD1204S-B0 is a high-performance 1U rack-mounted optical line terminal that fully complies with IEEE 802.3x and FSAN standards. Designed for efficiency and reliability, this device features a compact yet powerful architecture, providing 1x USB interface, 4x uplink GE ports, 4x uplink SFP ports, 2x 10-gigabit uplink ports, and 4x EPON ports, each supporting a 1:64 splitting ratio, allowing up to 256 EPON terminals to be connected simultaneously. Engineered to meet the demands of modern network infrastructure, it offers a combination of high performance, flexibility, and energy efficiency while maintaining a compact footprint, making it an ideal choice for data centers and enterprise networks. The FD1204S-B0 supports essential networking functions, including OAM protocol, PON protection switching, and advanced Layer-2 and Layer-3 switching capabilities such as VLAN, Trunk, RSTP, IGMP, QoS, and ACL. It ensures seamless network operation with features like online ONU configuration, dynamic bandwidth allocation (DBA), and comprehensive user and alarm management. The EPON functionality enables long-distance transmission of up to 20KM while supporting data encryption, group broadcasting, port VLAN separation, and remote software upgrades. Designed with reliability in mind, it includes power-off alarm functions, broadcasting storm resistance, port isolation, and a specialized system breakdown prevention mechanism to maintain stability. With a 1U 19-inch standard rack-mount design, the FD1204S-B0 provides flexible connectivity options, including four 10/100/1000M auto-negotiation COMBO ports, four SFP interfaces, and two 10-Gigabit SFP+ interfaces for high-speed data transmission. Its EPON ports utilize SC/UPC interfaces with a symmetrical 1.25Gbps rate and a 1490nm forwarding and 1310nm receiving wavelength, optimized for single-mode fiber with a 9/125μm specification. The device supports multiple network management methods, including CLI, SNMP, TELNET, SSH, and WEB, ensuring convenient remote configuration and monitoring. Built for enterprise environments, the FD1204S-B0 operates under a wide range of conditions, with a temperature tolerance of -15 to 50°C and humidity support from 5% to 90% (non-condensing). Its robust power supply options include 220V AC input (100V–240V, 50/60Hz) and -48V DC input (-40V to -72V), with a maximum power consumption of 60W. Whether deployed for FTTP, video monitoring, IoT, enterprise LANs, or three-in-one broadcast television networks, this EPON OLT delivers a superior price-performance ratio, offering a scalable and future-proof solution for high-demand networking applications.