Internet telephony allows audio calls between computers over the internet, combining telephone and data networks. It has advantages like lower costs, flexibility since it's hosted in the cloud, and accessibility from any device with internet. However, it requires a reliable internet connection and can experience latency, jitter, or limited location tracking for emergency calls. Internet telephony has evolved through generations from early voice conversations between software-equipped computers to integrating gateways between the internet and telephone network today. An ideal system provides high-volume call processing between private and public networks cost-effectively while using standards.

1. Deepanshu Dogra
Roll No- MCA/25011/21
Subject: Data Communication and
Computer Networks

2. Internet Telephony
Internet Telephony is a powerful and economical
communication option by combination of the
telephone network and data networks.
Internet telephony uses internet to send audio
between two or more computers users in the real
time.

3. Advantages of Internet Telephony:
• Full scalability and flexibility: The best Internet Telephony
solutions are hosted in the cloud, so there’s no need for the
customer to buy, install and maintain expensive on-premise
platforms.
• Lower costs: Typically, IP Telephony is more cost-efficient than
traditional landline and mobile telephony. With a cloud
telephony solution, internal calls within an organization are
completely free of charge.
• Seamless accessibility and portability: Users can access their
Internet Telephony services from anywhere and from any
device as long as they have an Internet connection

4. • Advanced features: With Internet Telephony, voice and data
are transported over the same network, making new services
possible such as high quality video calls.
• Excellent voice quality: IP Telephony has come a long way
since it was first introduced in the 1990s. As long as the user
has a fast and stable Internet connection with good
bandwidth, VoIP calls should experience no latency issues or
interruptions.

5. Disadvantages of Internet Telephony
• Reliable Internet Connection Required: The overall quality of
the call depends on the speed of the internet connection.
• Latency and Jitter: When communicating online each message
is broken into bits of data called “data packets.” These packets
are then reassembled at their intended destination to create
the original message. Latency and jitter are when these data
packets either hit delays in transmission or get improperly
re-assembled.

6. • Limited Location Tracking for Emergency Calls: Location
tracking is the final con of VoIP. Because of VoIP’s portability
and accessibility, it’s difficult for third parties to pinpoint
where a call originates.

7. Generations of Internet Telephony:
• First Generation: Introduction to enable voice conversations
user with telephony software-equipped-computers.
• Second generation: It overcomes the difficulties by mapping
IP Addresses.
• Third Generation: Internet telephony starts to receive serious
attention. Gateways were introduced that provide a two way
interface between the PSTN( public switched telephone
network) and internet.

8. Ideal Internet Telephony
• High Volume call processing between private and public
networks.
• High Volume real-time translation between IP and switched
networks.
• Economic scalability.
• Broad acceptance and implementations of standards

9. Thank you