I have an Excel spreadsheet, developed by Quintum, that is very useful for calculating voice bandwidth. Unfortunately, the forum does not allow me to post an URL link 🙁
Also I might recomend turning VAD off, as it will decrease the quality of your calls. Most of the customers calling to your call centre won’t appreciate it.
hehehe… in this site you can find calculator for this.. at the left part of this web page, you can read “online calculators”, click for lines to VoIP Bandwidth calculator…
Approximately 160 kbps bandwidth is you need to make 10 concurrent calls but with G.723 Codec. Higher codecs gives better performance in clarity and quality, but also requires you higher bandwidth, it requires 800Kbps bandwidth with G.711…
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