A decision to consider implementing voice over IP generates several questions that are not easily answered. Two...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
specific questions our company has addressed in a couple of applications are:
How much bandwidth can be saved by using voice over IP, compared to traditional 64 kbps circuit switching?
For this there is a free Excel spreadsheet called "VoIP-Calc," available at: http://www.infotel-systems.com/downloads_registration.htm. A tutorial on how to use this spreadsheet is also available here.
What is the expected mouth-to-ear delay for a given pair of users?
This calculator is available from http://www.infotel-systems.com/Software_files.htm, and is an .exe file that is useable for a one month free trial, then can be purchased for $39 US. This tool includes the bandwidth calculator as well as mouth-to-ear delay. It also includes a transit delay and jitter estimator that can be used in the calculation.