Yaesu's Wires-X system uses Digital radios that communicate using a proprietary version of the C4FM RF protocol and digital repeaters, tied to the internet, for backhaul to Yaesu's Wires-x Servers.

• Yaesu's Wires-X system uses Digital radios that communicate using a proprietary version of the C4FM RF protocol and digital repeaters, tied to the internet, for backhaul to Yaesu's Wires-x Servers.
• This means that the radios employed must be capable of using Yaesu's digital protocols.