Disadvantages of VoIP</li></li></ul><li>INTRODUCTION<br /><ul><li>Voice over Internet Protocol (VoIP) is a transmission technology for delivery of voice communications over IP networks.
Internet telephone call are conversion of the analog voice signal to digital format and compression/translation of the signal into Internet protocol packets.
VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs.
With VoIP, we can make a call from anywhere we have broadband connectivity.</li></li></ul><li>VoIP Overlay Routing Scheme<br />Overlay Network Architecture<br />A VoIP overlay network (VoON) consists of VoIP endpoints, edge nodes and relay nodes<br />Integration into Call Signaling<br />Signaling phase can be used by a VoON to determine the most suitable path for the media streams of a call.<br /> Measurements<br />-- The quality of service on candidate routes needs to be determined at the time a routing decision is made<br /> --The quality of a call in progress needs to be monitored.<br />
VoIP technologies<br />VoIP is a revolutionary technology that has the potential to completely rework the world's phone systems.<br />Technologies used to implement Voice over Internet Protocol include:<br /><ul><li>H.323
RTP</li></li></ul><li>VoIP implementations<br />Voice over IP has been implemented in various ways using both proprietary and open protocols and standards.<br />ATA (analog telephone adaptor)<br />IP Phones<br />Computer-to-computer<br />
ATA( Analog Telephone Adaptor)<br /><ul><li>ATA allows us to connect a standard phone to our computer or our Internet connection for use with VoIP. The ATA is an analog-to-digital converter. It takes the analog signal from our traditional phone and converts it into digital data for transmission over the Internet.
To connect through ATA, plug the cable from our phone that would normally go in the wall socket into the ATA, and we're ready to make VoIP calls. </li></li></ul><li>IP Phones<br /><ul><li> These specialized phones look just like normal phones with a handset, cradle and buttons. But instead of having the standard RJ-11 phone connectors, IP phones have an RJ-45 Ethernet connector. These phones allow VoIP calls without the use of a computer. Instead they connect directly to the IP network.
In order to connect to the PSTN they usually require service from a VoIP service provider. </li></ul> <br />
Computer-to-computer <br /><ul><li> This is certainly the easiest way to use VoIP. We don't even have to pay for long-distance calls. There are several companies offering free or very low-cost software that we can use for this type of VoIP.
We need the software, hardware and an Internet connection, preferably a fast one that would get through a cable or DSL modem.
Except for the normal monthly ISP fee, there is usually no charge for computer-to-computer calls.</li></li></ul><li>Call Waiting<br />Voice Mail<br />Features<br />Call Transfer<br />Caller Id<br />Call Forwarding<br />The Power Of VoIP<br />VoIP has become a powerful force in telecommunications due to several reasons. <br /><ul><li> cheaper than PSTN service providers
enabling the user to change, adjust , or listen to these features </li></ul>over the Internet.<br /><ul><li> Long distance is usually provided free of charge. </li></li></ul><li>VoIP Providers<br />Skype<br />Galaxy Voice<br />Vonage<br />Providers<br />Packet 8<br />Speakeasy<br />
Saves Money And Cost Efficient<br />Integration With Audio, Data And Video Applications<br />Offer Features For Free stuff<br />Ability To Choose Your Own Area Codes<br />Flexibility<br />Benefits Of VoIP <br />
No way to associate a geographical location with an IP address.
It’s susceptible to all the hiccups normally associated with home broadband services.
Phone conversations can become distorted, garbled or lost because of transmission errors.
VoIP is susceptible to worms,viruses and hacking.
VoIP is having a phone system dependant on individual PCs of varying specifications and power.</li></li></ul><li> Conclusion<br /><ul><li>VoIP is a prospering technology that enables users to place phone calls over internet.
By taking advantages of VoIP specific characteristics, our approach can detect quality problems network failures faster and with less overhead than existing approaches.
VoIP has become a popular method of hiring with outsourcing.
VoIP is able to provide faster problem of recovery with less overhead than existing approaches.</li></li></ul><li>Thank You !<br />Queries…??<br />