This programming cable is designed for quick and easy programming of Tait TM8250 radio. The internal converter circuit board (interface) mounted inside the DB9 shell. To be able to program your radio you have to insert the RJ-12 6-way plug of the interface right in the middle of the 8-way RJ45 microphone socket of your radio so that the extreme left and right contacts of the socket are not used. This cable does not include any manuals or instructions for use. Therefore, it will be assumed that the purchaser is knowledgeable in using the cable for the applications it is designed for. Please note that we supply the hardware only, we don’t supply the programming software.