| Voice over IP (VoIP) technology, or IP telephony, | | | | carried in packets over the IP network.Using the |
| is simply a system for transmitting telephone calls | | | | same bandwidth, a VoIP network can carry many |
| over data networks, such as the ones that make | | | | times the number of voice calls as a switched |
| up the Internet.The efficiency, flexibility and cost | | | | circuit PSDN network.The net result of this |
| savings of VoIP will be taken advantage of by a | | | | obvious.VoIP can result in huge savings on the |
| growing number of personal and corporate | | | | amount of physical resources required to |
| users.In this report we will look at the history, | | | | communicate by voice over long distances. It |
| growth, flexibility and advantages of VoIP based | | | | does so by providing a far more efficient use of |
| systems over traditional public switched networks, | | | | bandwidth, one of the fundamental drawbacks of |
| (PSDN)Let's look at why VoIP will change the way | | | | traditional telephone networks.There is of course, |
| we communicate forever.The Disadvantages Of | | | | much more to VoIP than just sending the |
| Traditional PSDN NetworksWith PSDN calls are | | | | packets over the Internet.There is an agreed |
| made using circuit switching techniques.PSDN | | | | protocol for how computers find each other and |
| simply means that an individual call uses a | | | | how information is exchanged in order to allow |
| dedicated path for the total duration of the | | | | packets to flow between users, there is also an |
| call.During a telephone conversation of this nature | | | | agreed format, (called payload format), which |
| only about 50% of the bandwidth is used at any | | | | covers the content of media packets.VoIP A |
| given time.The reason for this is a call consists | | | | Total Global Telephony SolutionVoIP allows us to |
| normally of two people, one person listens and | | | | use a single high-speed Internet connection not |
| one person talks, which reduces the | | | | just for voice but, video, and data |
| bandwidth.This is further reduced as there are | | | | communications.This is known as convergence and |
| natural pauses in conversation such as pauses | | | | is one of the primary drivers for corporate |
| between words, people thinking, pauses for | | | | interest in the technology.The benefits of |
| breath etc. The connection is of course reliable for | | | | convergence are obvious:By using a single data |
| voice transmission, but its drawback is that, it is | | | | network for all communications, it is possible to |
| very inefficient in its use of bandwidth.This has | | | | reduce overall costs of communication for users.A |
| kept telephone costs relatively high until now, but | | | | VoIP service provider can be located anywhere in |
| VoIP provides the solution:A more efficient use of | | | | the world; a person with Internet access is not |
| bandwidth.The Advantages Of VoIPVoice over IP, | | | | geographically restricted in their selection of VoiP |
| (VoIP), is a way of converting the analogue | | | | service providers.Lower costs for you and |
| signals when using a phone, to a digital format | | | | everyoneThis competition enables low |
| (across a network) and then back into analogue | | | | communication costs for anyone no matter |
| when it reaches the receiver.In a VoIP network, | | | | where they are in the world. |
| digitized voice data is highly compressed and | | | | |