What common DC power supply voltages are generated by HFC fiber optic nodes?

The correct answer is established by the typical operational specifications of HFC (Hybrid Fiber Coaxial) systems, particularly with respect to the voltages commonly utilized in fiber optic nodes. HFC nodes often require reliable and standardized DC power supply voltages to effectively power various components, including amplifiers, optical transmitters, and digital signal processors.

The most common DC voltages generated and used in HFC fiber optic nodes are indeed +5V, +12V, and +24V.

• The +5V supply is frequently utilized for control circuitry and logic components within the node.

• The +12V supply is commonly used for powering RF amplifiers and other circuit elements that require moderate power.

• The +24V supply may be employed for high-power components or where higher operational thresholds are needed.

These voltages provide flexibility and are aligned with industry standards, ensuring compatibility with a wide range of equipment used in HFC networks. Other configurations may exist, but are less common; hence, option B represents the industry standard best aligned with typical HFC node requirements.