Complex sentence: The terms "tip" and "ring" originated in the early days of telephony when telephone operators used plugs to connect customer calls, and result from the part of the plug to which the wires were connected.
Split into simpler sentences: The terms "tip" and "ring" originated in the early days of telephony when telephone operators used plugs to connect customer calls. They are named after the parts of the plug to which the wires were connected.