What is telephony?

Telephony refers to the technology and systems that allow for voice communication over distances, primarily involving the use of telephones. Option B accurately describes telephony as the integration of computers and telephones, which reflects the evolution of traditional telephony into modern digital communication systems. This integration encompasses VoIP (Voice over Internet Protocol) services that allow users to make voice calls using the internet, blurring the lines between computer and telephone functionalities.

This definition aligns with the way telephony has adapted to modern communications, where both device types work together to facilitate seamless communication. In contemporary settings, telephony is not limited to voice calls but also includes features like video conferencing and messaging through these integrated systems. Thus, option B encompasses the broader and more current interpretation of telephony in a digital context.