| Voice over internet protocol is also called IP | | | | network traffic and bandwidth is determined in |
| telephony, Internet telephony or also broad band | | | | advance. More sophisticated VoIP programs could |
| phone. VoIP internet telephony works in the same | | | | be used for less data loss, full duplex, real time |
| manner as data transfer on a network. Protocols | | | | voice communicationWorking of VoIP |
| that determine the aspects of connection and | | | | Traditional telephony used analog signals. Digital |
| transfer of data are used to transfer data over | | | | technology made the process more efficient by |
| the network. The protocol that is used to | | | | converting analog signals to digital signals and then |
| transfer voice over the IP network is called the | | | | compressing them. This increases the speed of |
| Voice over IP or VoIP protocols. The network | | | | transmission and lowers the bandwidth |
| voice protocol was invented for the ARPANET in | | | | requirement as well. VoIP Equipment uses the |
| 1973. It was an experimental protocol that has | | | | Sessions Initiation Protocol or H.323 for defining |
| now realized into the commercial protocol. VoIP | | | | the communication between devices. H.323 is |
| Wireless Phone is the present realization of this | | | | designed for video conferencing has a wider range |
| experiment.Intranets and VoIP | | | | of applications when compared to SIP. But SIP is |
| The Private branch exchanges were designed to | | | | more robust when it comes to voice transmission |
| automate the telephone communication systems. | | | | only.VoIP Basics the handshaking signals that are |
| With the advent of microprocessors these were | | | | shared between the two ends to establish a |
| used in the PBX and hence it was easier to | | | | connection. In the traditional telephone system |
| integrate VoIP as well. Integration of VoIP helped | | | | these were achieved using circuit switching |
| save money as the transmission in the form of IP | | | | methods. For connection to be established and |
| packets was cheaper than a dedicated connection | | | | provide you good voice quality you need a cable |
| between two ends.If you have an intranet and a | | | | modem for your internet connection or a |
| PBX as well you could enable VoIP by connecting | | | | different type of telephone system. High speeds |
| an IP gateway between your PBX and intranet. | | | | are essential to a voice connection. The |
| Thus routing calls through the data line and saving | | | | connection between the two points is maintained |
| cash. Directing long distance calls and international | | | | as long as the conversation goes on. The IP |
| calls via data lines is an effective way of cutting | | | | packets are transferred between the two points |
| your bill on communication.VoIP can be used | | | | using a real time protocol. Similar to the telephone |
| internally as well over the intranet. The advantage | | | | system, VoIP providers charge you a flat rate |
| with this is that you need not buy a separate | | | | according to minute.Benefits |
| PBX for voice communication. VoIP over the | | | | There are a few Advantages of VoIP that make |
| intranet data lines is more predictable as the | | | | people adopt this technology. |