I need to come up with a relatively accurate number of inbound and outbound external minutes used per month. What is the most accurate and simple way to do this? We used Appia and Nexvortex for the past several months but we had consistently bad quality service, no audio, one way audio and severe audio quality problems. I tried Sigmavoip because they offered us a week long free trial and we had no problem at all with them but they don't offer packages. I need to get some exact numbers for an accurate estimate because they charge by the minute and we run a high volume call center. I must also subtract toll free dialed numbers from the minutes count. Any tips or insight will be much appreciated.