Telephony has revolutionized the way in which people communicate, shaping human interactions, business operations, and technological advancements. From its early beginnings with Alexander Graham Bell’s invention of the phone in 1876 to the sophisticated cellular networks and digital communications of today, telephony has developed into a important component of worldwide https://drive.google.com/drive/folders/1LsG7GELSh90ZTRa2kTzn_NU1fhrEjco0