VoIP allows users to make voice calls using an Internet connection instead of a regular phone line. It works by converting voice into digital data packets that are transmitted over the IP network and then reconstructed at the receiving end. The key benefits of VoIP include lower costs compared to traditional phone service, open standards that ensure interoperability between vendors, and the ability to integrate voice and data onto a single network. Common VoIP protocols are H.323, SIP, and MGCP. VoIP sees broad use for internet calling and is widely used to provide phone services at a lower cost than traditional telephone networks.

1. Advanced Computer Networks
Topic: Voice Over IP Network(VoIP)
Shashikant V. Athawale
Assistant Professor
Department of Computer Engineering, AISSMS
COE ,Pune

2. Agenda
• What is VoIP
• VoIP Architecture
• VoIP Applications

3. What is VoIP
• Voice over IP (VOIP) uses the Internet
Protocol (IP) to transmit voice as
packets over an IP network.
• Provide Many services to clients.
• VoIP use in many Browsers.

4. Why Use VoIP
• Cost savings.
• Open standards—h.323, sip, mgcp.
• Multi-vendor interoperability.
• Integrated ip voice and data networks.

5. How VoIP Works
Fig 1: Simple VoIP in day today life

6. Contd..
Fig 2:VoIP works in Internet

7. VoIPArchitecture

8. VoIP Protocols
• H.323
• SIP
• MGCP
• H.248
• Megaco

9. VoIPApplications
• Broadly Used Over Internet Browsing.
• Used in Voice Processing.
• Perceived quality of the PSTN at much
lower cost. VoIP systems.
• must be flexible and to allow a mix of
public and private services and to adapt
to local regulations.