[cisco-voip] Video Call Bandwidth requirements

[Syed Khalid Ali]

Hi

Need help regarding video conferencing setup. We will have 8 site (including head office). The minimum bandwidth per video call will be 512 kbps. The connections are T1 lines. Currently we have IPSec VPN with overlay routing over the internet for data. So how do I calculate the bandwidth for each site if all sites do conferencing simultaneously.

My rought estimate is: 
512k + L3 + L2 + IPSec + GRE

regards,
syed khalid ali
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