Advanced Computer Networks

Topic: Voice Over IP Network(VoIP)

Shashikant V. AthawaleAssistant Professor

Department of Computer Engineering, AISSMS COE ,Pune

Agenda

• What is VoIP

• VoIP Architecture

• VoIP Applications

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.

Why Use VoIP

• Cost savings.

• Open standards—h.323, sip, mgcp.

• Multi-vendor interoperability.

• Integrated ip voice and data networks.

How VoIP Works

Fig 1: Simple VoIP in day today life

Contd..

Fig 2:VoIP works in Internet

VoIP Architecture

VoIP Protocols

• H.323• SIP • MGCP • H.248 • Megaco

VoIP Applications

• 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.