ED793/4 is an Ethernet-to-serial communication interface developed by On Shore Technology. It is designed to help connect Ethernet devices to RS-232, RS-422/485, V.24, and other serial devices. It is a standalone unit that requires no additional hardware, such as a computer or other external devices. The unit has configurable ports and speeds, as well as advanced features, such as serial tunneling which allow data to be sent and received in both directions. It is a full-featured product with built-in diagnostics, programming capabilities, and input/output ports. Its rugged construction and mechanical design make it ideal for harsh environmental conditions.