The ZTE C650 OLT (Optical Line Terminal) is a versatile and powerful piece of fiber optic network equipment designed for FTTH (Fiber to the Home) deployments. It is engineered to deliver high speed broadband services to residential and business customers. Here's a concise overview of its key specification parameters:

1. Technology: The C650 supports GPON (Gigabit Passive Optical Network) technology, which is a point to multipoint access method that uses fiber optic cables for high speed data transmission.

2. Service Capacity: It is capable of supporting a large number of users, making it suitable for dense urban environments or large residential complexes.

3. GPON Ports: The OLT features multiple GPON ports, which allow for the connection of multiple Optical Network Units (ONUs) at the customer premises.

4. GFHG, GFGN, and GFGM: These terms likely refer to specific models or configurations of the C650, which may include different capabilities or features tailored to specific network requirements.

5. Scalability: The C650 is designed to be scalable, allowing network operators to expand their service offerings as demand grows.

6. Management and Control: It includes advanced management and control capabilities, ensuring efficient operation and easy maintenance.

7. Redundancy: The system is built with redundancy in mind, ensuring high availability and reliability of services.

8. Energy Efficiency: The C650 is designed with energy efficiency in mind, reducing operational costs and environmental impact.

9. Security: It incorporates robust security features to protect against data breaches and unauthorized access.

10. Compliance: The equipment adheres to industry standards and regulations, ensuring compatibility with existing infrastructure and future proofing the investment.

In summary, the ZTE C650 OLT is a high performance, scalable, and reliable solution for FTTH networks, offering a range of features and capabilities that make it an excellent choice for service providers looking to deliver advanced broadband services.