Here is a list of questions we are commonly asked about VoIP Calculator. Please contact us if you have any others.
VoIP Calculator supports the G.711, G.723.1, G.726, G.728 and G.729A.
Yes, it takes both the two and four byte variants of RTP header compression into account.
Converting between lines and IP bandwidth is a precise calculation and the results are accurate. Bear in mind that VoIP Calculator only models layer three and above of the OSI model and does not take into account the bandwidth overhead of data link protocols such as Ethernet of ATM.
Converting between busy hour traffic and voice paths (and therefore bandwidth) uses the Erlang B traffic model that has been used throughout the industry for decades. It makes certain assumptions about the nature of offered traffic which may not necessarily apply in your case. For example, It assumes random (Poisson) arrivals. This is usually reasonable, but sudden peaks of calls resulting from a radio or television advertisement are not accurately modelled. In these circumstances, you should use the calculators with caution and common sense.
VoIP Calculator works up to 100,000 Lines and 20,000 Mbps.
Our desktop products work on all versions of Windows from Vista to Windows 11. We do not make software for the Apple Mac.
VoIP Calculator costs $59 (US dollars) for an installation on a single computer. We also offer enterprise licences for multiple installations.
This is a once-only payment and includes free upgrades for the lifetime of the product.
I am looking for a calculator to size my SIP trunks, sessions, etc. . Which would you recommend?
For sizing VoIP trunks, I would recommend VoIP Calculator.