In a HFC fiber-optic node, which common DC voltage is produced alongside +5 and +12?

In a Hybrid Fiber-Coaxial (HFC) fiber-optic node, the standard common DC voltages produced include +5 VDC and +12 VDC, which are commonly used to power the electronic components within the node. The other voltage that is typically found in these environments is +24 VDC. This voltage is utilized to provide sufficient power headroom for various functions and circuits that may require a higher voltage than what is supplied by +5 VDC or +12 VDC. The +24 VDC is often used for components such as high-performance amplifiers or signal processing units that benefit from the increased voltage to ensure robust operation and performance.

The other voltage options, though they can be utilized in various electronic applications, are not standard outputs from HFC nodes in common practice; therefore, they do not represent the typical DC voltage outputs alongside +5 and +12 VDC in this specific context.