The QYT KT-8900 uses a 3.5mm TRRS (4-pole) or TRS (3-pole) jack for programming, located on the rear panel. Unlike many other mobile radios that use an RJ45 mic port for data, the KT-8900 utilizes a standard audio-style connector for its serial interface. Programming Cable Pinout (3.5mm Jack)
Solder to 3.5mm Plug: Follow the TRS pinout mentioned above. qyt kt8900 programming cable pinout top
on the back of the unit, not the microphone port on the front. Chipset Compatibility: Many original cables use a The QYT KT-8900 uses a 3