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Ethernet Bandwidth Budget for Off-Net VoIP Calling
Approximate Bandwidth Budget
Codec
for Each Side of Conversation
G.711
G.726-40
G.726-32
G.726-24
G.726-16
G.729
Assumptions:
- Bandwidth Calculated with No Silence Suppression
- Two 20 Millisecond Frame Samples
- Propagated over an Ethernet WAN Link.
- Note: The use of Silence Suppression can reduce the average bandwidth budget by over 30%
Reference Web Sites:
VoIP Line Bandwidth Calculator: http://www.erlang.com/calculator/lipb/
VoIP Bandwidth Calculator: http://www.packetizer.com/voip/diagnostics/bandcalc.html
© 2006 Cisco Systems, Inc. All Rights Reserved.
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