Motorola Gm950 Plus Programming Software May 2026

The software provides low-level access to the radio’s EEPROM. Primary configurable parameters include:

| Category | Parameters Programmable | |-----------------------|---------------------------------------------------------------------------------------------| | Frequencies | RX/TX frequencies (136-174 MHz VHF or 403-470 MHz UHF, depending on model variant) | | Channel Spacing | 12.5 kHz (narrowband) or 25 kHz (wideband) – compliance with narrowband mandates | | Signaling | CTCSS (38 tones), DPL (83 codes), and Selcall (selective calling) | | Power Levels | High (25-40W) / Low (1-10W) per channel | | Time-Out Timer | Adjustable TOT (0-240 seconds) | | Scan Lists | Programmable scan groups (up to 10 channels) with priority channel designations | | Auxiliary Functions| Horn alert, external PA, ignition sense, and emergency footswitch inputs |

Note: The GM950 Plus does not support trunking or digital modes (P25/DMR). motorola gm950 plus programming software

This is the most debated topic among GM950 Plus programmers.

| Feature | DOS RSS (e.g., R02.00) | Windows CPS (e.g., R06.12) | | :--- | :--- | :--- | | OS Required | True DOS (or DOSBox) | Windows 98/XP/7 32-bit | | Speed | Very fast, stable | Slower, but user-friendly | | Features | Low-level tuning, alignment | Basic channel programming | | Risk | High (can brick radio easily) | Medium | | Hardware | Serial RIB required | USB RIB-less possible | The software provides low-level access to the radio’s

Recommendation: Use Windows CPS for simple frequency and tone changes. Use DOS RSS only for RF alignment or recovering a bricked radio.

Once your hardware is connected and the RSS is running: Note: The GM950 Plus does not support trunking

[Radio] <-- (4-pin cable) --> [RIB Box] <-- (DB9 serial) --> [PC with Legacy COM Port or USB-to-Serial]

To program a GM950 Plus, you cannot simply use a USB cable and a Windows 10 laptop. You need a specific combination of hardware and software.