Voip Hardware Calculator

At one time or another I found an online calculator that would calculate the number of simultaneous VOIP calls you can have with the hardware selected. Now, I can’t find it. Anyone have any idea on what I’m talking about?

Here’s one for Wireless

http://www.connect802.com/voip_bandwidth.php

Here’s a few more including Erlang calculations depending on bw:

http://www.voip-calculator.com/calculator/

Here’s Asterisk Guru’s tools:

http://www.asteriskguru.com/tools/