It gives a reason to cut off USB cables from old mice and keyboards and keep them around for cables like these.

DB25 RS232 programming cable Vga Connector, Plc Programming. These cables sell on ebay for as much as $60. Pinout and signals for the serial port connector. The one on the right was purchased by another ham for more than $30. The left cable is the one just made for under $10. Tirupati Telecom Services - Offering Portable Programming Cable (USB) for Motorola Models XIR P3688, P6600i Series, P8600i Series in Ahmedabad, Gujarat. However the back will program everything. I was told by a Motorola rep that the front microphone connector will not program everything on the radio and is not recommended because it is some proprietary system Motorola has. Some cheap cables might not follow the standard color scheme. Motorola PMKN4010B is a mobile and repeater rear accessory programming cable. Motorola PMKN4010B Mobile and Repeater Programming Cable. Some cables may be swapped depending on who made them. Cables Motorola PMKN4010B Mobile and Repeater Programming Cable Zoom-3.42. Some people have mentioned that the green and white wires where swapped, so you might want to check your USB connector before making the assumption that the white and green wires are what they really say they are. Lower left side of the connector is pin 1 To connect MOTOTRBO radio to TRBOnet Enterprise Server you need to create a connector based on Motorola programming cable or mobile accessory connector kit. Upper left side of the connector is pin 2 Looking at the back of the radio the connector facing you the pins are as follows: Another goal is the correct voltage level transformation with regard for the real radio programming cirquits. Cut the one side of the USB cable that is not needed. This needs a simple USB cable with no other parts involved besides the PMLN5072 connector.

Motorola programming cable pinout