Downloaded 23 times
More Related Content
Similar to Voip(Voice over internet Protocol)
Voip(Voice over internet Protocol)
- 1. UIT RGPVUIT RGPV SEMINARSEMINAR Submittedby: Submitted to:Submitted by: Submitted to: Ankit GuptaAnkit Gupta Prof. Shikha AgrawalProf. Shikha Agrawal 0101CS1110130101CS111013 Prof. Rajeev PandeyProf. Rajeev Pandey CSE-ACSE-A
- 2. Voice over IPVoiceover IP
- 3. Contents Abstract WhatisVoIP HowVoIP works VoIP Architecture Applications
- 4. Abstract Voice overInternet Protocol (VoIP) is a technology that enables one to make and receive phone calls through the Internet instead of using the traditional analogy PSTN (Public Switched Telephone Network) lines.
- 5. What is VoIP? VoIP is packetisation and transport of classic public switched telephone system audio over an IP network. It allows 2-way voice transmission over broadband connection. It is also called IP telephony, internet telephony, voice over broadband, broadband telephony.
- 6. PSTN vs. INTERNET PSTN Voice network use circuit switching. Dedicated path between calling and called party. Bandwidth reserved in advance. Cost is based on distance and time. INTERNET Data network use packet switching. No dedicated path between sender and receiver. It acquires and releases bandwidth, as it needed. Cost is not based on distance and time.
- 7. PBX Yesterday’s Networks Circuit SwitchedNetworks (Voice) CO PBX CO CO Packet Switched Networks (Data) Router Router Router Router Router • Separated networks • Separated applications/services
- 8. PBX IP Phone Converged Network PSTN CO Gateway Router Router Router Router •Converged network • Separated or integrated applications PBX IP Phone
- 9. VoIP – Howdoes it work? Converting the voice signal ADC (analog to digital) DAC (digital to analog) Voice (source) - - ADC - - - Internet - - - DAC - -Voice (dest) Transmission of voice traffic in packets
- 10. VoIP – Howdoes it work? The 1-2-3s of VoIP 1. Compression – voice is compressed typically with one of the following codecs, G7.11 64k, G7.29AB 8k, G723.1 6.3k 2. Encapsulation – the digitized voice is wrapped in an IP packet 3. Routing – the voice packet is routed thru the network to its final destination
- 11. LT S©Telcordia Technologies, Inc.Slide 11 IP Network Multimedia PC Multimedia PC Initially, PC to PC voice calls over the Internet VoIP Architecture? PSTN (DC) Gateway PSTN (NY) Gateway Public Switched Telephone Network Gateways allow PCs to also reach phones …or phones to reach phones
- 12. Applications Web applications suchas MSN Messenger, Skype, AOL Messenger, AIM, Apple Chat use this protocol to connect with other users for voice and video connection over the internet. Most of these applications are free, but can be upgraded for a subscription fee. VoIP is useful because it is a great way to stay in contact with friends and family using video and voice chat over the internet.
- 13. Recently it hasbeen brought to Xbox Live and Playstation (PSN) for chat whilst playing a game. Games such as Call Of Duty, including many other first person shooting games use this facility so that the game is more realistic and you are able to connect with other players who are playing the same game.
- 14. Do Companies WantVoIP? 76% Will!76% Will! Unsure 4% Not at all likely 4% Not very likely 16% Likely 28% Very likely 32% Extremely likely 16% Network World asked 500 readers to assess whether they would consider using voice over IP:
- 15. Key Business Driversfor LAN-Based Telephony and VoIP 81%81% 59%59% 38%38% 26%26% 0 50 100 Save MoneySave Money Better Utilization of BandwidthBetter Utilization of Bandwidth Support MultimediaSupport Multimedia Improve Network ManagementImprove Network Management
- 16. Security Risks AsVoIPuses the Internet, for example, it is vulnerable to the same type as security risks Hacking Denial of service Eavesdropping