Telephony has revolutionized the way people communicate, shaping human interactions, enterprise operations, and technological advancements. From its early beginnings with Alexander Graham Bell’s invention of the telephone in 1876 to the sophisticated cell networks and digital communications of as we speak, telephony has developed into a vital part of world https://docs.google.com/file/d/1e5LdeuodRPjMw2uHlI-vZwsgt-TC8Hl_