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- in-house: If you already own an adequate server you may install an IP PBX and are ready to provide unified communicationsUnified Communications
- hosted: Your server can be held within a data center. It is highly recommended to choose a data center that is geographically close to most of your customers as the quality of service relies on this.
- in the cloud: There are some organizations that offer infrastructure as a service. For instance, you can rent a server from Amazon.com.
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Another issue that needs to be addressed is that of connecting your server to a public telephone network. This becomes of your concern especially when your server is in-house. To connect to such a network you will need a gateway that routes and translates calls between the two networks for the VoIP user. The telephone company provides one or more trunk lines to the customer for connection to the customer's PBX.
What about codecs?
Codecs are designed to enhance VoIP calling sound quality. However, these codecs influence your server’s or your network’s performance.
As an example, G711u and G711a do not compress packages upon sending them. This means that your call quality will improve, but they consume bandwidth. On the other hade, if you use G729 – which is one of the most used codecs – the packages will be compressed and you call quality amplified, but this action consumes a greater amount of CPU.
A fair conclusion is that you should always calculate your system to have at least 30% resources free most of the time, so that you won't have to worry about peaks.
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In addition to a visual interface, VoipNow also offers billing engine operations. With a regular IP PBX you most likely would have to export call records and then process them either manually or with another software product. This is not time effective and the reports may not be precise. VoipNow’s charging plans automate this operation for you and its call history based reporting is always exact.
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To sum it up...
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