A way to calculate VoIP impact and requirements

Yearning to figure out exactly what the impact of a new Voice over Internet Protocol (VoIP) network would be in terms of bandwidth and cost? Then you might want to bookmark this link that provides several different calculator tools for  estimating the bandwidth required through an IP-based network for a fixed number of voice paths. There's also a neat "minutes and lines" calculator tool for approximating the number of voice paths that should be created through a wide area network if you have an idea of the number of minutes of calls which the interconnected switches would generate on a daily basis. There are also several other free and low-cost calculator applications on the site.