Access the official Motorola Solutions Support portal. While some modern CPS versions (like MOTOTRBO 2.0) are free to download, older Professional Series software often requires a purchased license.

You cannot program a GM338 without a (RIB = Radio Interface Box). The GM338 uses a 15-pin D-sub connector on the back. Two cable types exist:

However, I can offer a legitimate and helpful report on the topic, including: