*Question G8C16:
Which of the following provide digital voice modes?*  

*Correct Answer is  D: DMR, D-STAR, and SystemFusion*  

### AI Response: (may contain errors)  

Digital voice modes are specific modes used in amateur radio to transmit voice data digitally. Let's break down the options:

1. **Correct Answer: DMR, D-STAR, and SystemFusion (Choice D)**
   - **DMR (Digital Mobile Radio)**: A digital voice mode that uses time-division multiple access (TDMA) to allow multiple conversations on the same frequency.
   - **D-STAR (Digital Smart Technologies for Amateur Radio)**: A digital voice and data protocol developed specifically for amateur radio.
   - **SystemFusion**: A digital communication mode developed by Yaesu, which supports both digital voice and data.

These modes are specifically designed for digital voice communication, making them the correct answer.

2. **Incorrect Choices:**
   - **Choice A: WSPR, MFSK16, and EasyPAL**
     - **WSPR (Weak Signal Propagation Reporter)**: Used for weak signal communication, primarily for propagation studies, not voice.
     - **MFSK16**: A digital mode used for text communication, not voice.
     - **EasyPAL**: Used for sending digital images, not voice.

   - **Choice B: FT8, FT4, and FST4**
     - **FT8 and FT4**: Digital modes used for weak signal communication, primarily for exchanging minimal information like call signs and signal reports, not voice.
     - **FST4**: Similar to FT8 and FT4, used for weak signal work, not voice.

   - **Choice C: Winlink, PACTOR II, and PACTOR III**
     - **Winlink**: A global messaging system that uses radio frequencies to send emails, not voice.
     - **PACTOR II and PACTOR III**: Digital modes used for data transmission, such as email over radio, not voice.

In summary, DMR, D-STAR, and SystemFusion are specifically designed for digital voice communication, while the other options are used for data or text communication, not voice.