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 phone in 1876 to the sophisticated cell networks and digital communications of today, telephony has advanced into a critical component of global connectivity. In https://drive.google.com/drive/folders/1MCc_zW_ZKu53qFH-1lU5ecJBmPwB-l3u