It seems like you are referring to a specific piece of telecommunications equipment, possibly related to fiber optic networking. However, the term "ZTE C600 21 inch OLT Master SFUN Power PRVR OLT Equipment" is not a standard term or product name in the telecommunications industry. It appears to be a mix of terms and acronyms, which makes it difficult to provide a clear and concise explanation.

Let's break down some of the terms you've mentioned:

1. ZTE: ZTE is a Chinese multinational telecommunications equipment and systems company that provides network equipment, mobile devices, and telecommunications services.

2. OLT: Optical Line Terminal, a device used in fiber optic networks to connect the service provider's equipment to the subscriber's premises.

3. Master: This term could refer to a primary or main device in a system, but without context, it's unclear.

4. SFUN: This term is not standard in telecommunications. It could be a typo or an abbreviation specific to a certain context or company.

5. Power PRVR: This might be a typo or a specific term for a power related feature or device. "PRVR" could potentially stand for "Power Reversal," but without context, it's hard to say.

6. 21 inch: This could refer to the size of a display or interface on the device, but it's unusual for telecommunications equipment to have such a large display.

7. Equipment: This term is general and refers to the hardware or machinery used for a particular purpose.

Given the lack of clarity in the term you've provided, it would be helpful to have more context or a specific product model or datasheet to provide a more accurate and detailed explanation. If you can provide additional information or clarify the context, I'd be happy to help further.

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