What is the purpose of bandpass filtering on a POTS line?

Bandpass filtering on a Plain Old Telephone Service (POTS) line is primarily used to remove high-frequency noise while allowing the desired frequency range to pass through. The human voice typically occupies frequencies between 300 Hz and 3,400 Hz, which fall within the passband of a bandpass filter. By filtering out frequencies that are outside of this range, the system can effectively reduce unwanted noise that may interfere with voice communication.

This process ensures that the clarity of voice signals is preserved and enhances the overall quality of the communication. Other processes, such as signal amplification or adjustments to minimize latency, do not directly relate to the primary function of a bandpass filter in this context. Thus, the role of the bandpass filter in maintaining a clear and intelligible signal makes its application crucial for effective communication on a POTS line.