 For example, in amateur radio, Icom, Kenwood, and Yaesu radios have all used the 8-pin screw-on connector, yet microphones from one brand are incompatible with the other two brands, at least without the use of an adapter cable in between the microphone and the radio.Although originally designed for telephone usage and later adopted for computer networking, the Modular connector has been used for microphone connections extensively on modern amateur radio equipment, including models from the three major manufacturers (Icom, Kenwood, and Yaesu), but primarily used on mobile radio equipment (designed to be mounted in vehicles).Like the screw-on round microphone connectors, there is little standardization among manufacturers, and even among different models from the same manufacturer, leading to significant interoperability problems when connecting non-OEM or homebrew microphones and other equipment.