Telephony refers to the technology and systems that enable voice communication over distances. It includes traditional landline phones, mobile phones, and internet-based services like VoIP (Voice over Internet Protocol). Telephony allows people to connect and converse in real-time, making it an essential part of daily life and business. With the rise of smartphones and mobile networks, telephony has evolved significantly. Today, users can not only make calls but also send messages, share images, and access the internet. This integration of features has transformed how we communicate, making it faster and more convenient than ever before.