Friedom-Tech Posted November 19, 2008 Report Share Posted November 19, 2008 1) How much bandwidth do i need per simultaneous call? 2) if i am using the calling card feature do i need doublebandwidth? ie is it considered two channels? one incoming and one outgoing? please advise asap. Quote Link to comment Share on other sites More sharing options...
Parks Posted November 20, 2008 Report Share Posted November 20, 2008 I believe that you are correct. Incoming is going to use a channel as well as the outgoing call. So you can estimate you total bandwidth need would be roughly 192kbps. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted November 20, 2008 Report Share Posted November 20, 2008 G.711 needs 64 kbit/s, and RTP adds an overhead of 24 kbit if you have 20 ms packets. That is 88 kbit/s per channel, so 176 for both channels. Add some extra for the SIP packets and then 192 is pretty realistic. If you choose different codecs the picture changes. G.711 is a "worst case" scenario. Quote Link to comment Share on other sites More sharing options...
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