Telephony has revolutionized the way individuals talk, 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 subtle cell networks and digital communications of today, telephony has advanced into a critical part of world connectivity. In https://drive.google.com/drive/folders/1MCc_zW_ZKu53qFH-1lU5ecJBmPwB-l3u