FMT04-CH1U is a 4-slot 1U managed chassis unloaded platform with redundant AC power, supporting AmpCon/WebGUI network management. The chassis adopts a unified software platform, compatible with EDFA/DCM/OEO (transponder) service modules, supports optical supervisory channel (OSC), and is a low-power platform combining advanced electronics with excellent optical performance to meet current and future multi-service access needs, suitable for new or upgraded networks. The chassis can integrate various optical-layer cards such as EDFA/DCM/MUX/OSW/OLP/R/B, providing cost-effective and flexible optical-layer solutions for dual-fiber and single-fiber DWDM networks. Each FMT chassis supports only one NMU control card.