Check whether the port is a combo port. A single-mode optical module can use only the single-mode optical fiber, similarly, a multi-mode optical module can use only the multi-mode optical fiber. Combo interface, also known as optoelectronic multiplexing interface, is the switch device panel on the two Ethernet ports (an optical port and an electrical port). In other words, it is a compound port that can support two different physical layers and share the same. The optical transceiver module is a small, hot-swappable network component that plays a crucial role in high-speed data communication. It facilitates converting electrical and optical signals, enabling seamless communication between devices like network switches and routers. In the KN-2710 and KN-1012 models, the WAN port for Ethernet cable connection.