[VOIPSEC] [CAnet - news] Assessing Skype's network impact

[Thomas Skora]

"Christopher A. Martin" <chris at InfraVAST.com> writes:

>>The G.729 codec in fact uses only 6.4 - 11.8kbps bandwidth per call, and
>>is a much better demonstration to customers of VoIP potential (there's
>>nothing like a dropped call/low audio quality to send a customer
>>running, screaming out the door!) I have found that codecs like G.711
>>(which is 64kbps) can only manage about 2 concurrent calls before audio
>>quality takes a severe nose dive.
>>
>>
>>
> One other point to note is that the overhead includes encryption with
> skype, as well as firewall traversal.

Both task have never take place in the media stream. Look at SRTP, how
many overhead the encryption causes here.

Thomas