I've had cause to do some investigation recently into best practices for planning, deploying, and managing VoIP. While I won't go into all of the details tonight, I did run across an interesting inconsistency. Most VoIP hardware/software vendors and consulting agencies that I've dealt with recommend a fairly telephony heavy planning measurement period prior to any VoIP deployment. This phase will involve, among other things, pulling reports from your old school telephone on phone usage so that you complete your erlang calculations to estimate the additional bandwidth...