[Asterisk-Users] internet bandwidth (comparing overhead)

[joachim]

For real life bandwidth tests : check the ppt on www.astertest.com

Zoa.


alexandre::aldeia digital wrote:

> Hi,
>
> I like to know why iLBC and GSM generate a 40-50kbps bandwidth....
> Is very high, if compared with your calculations for other 
> codecs(G723.1 / 17kbps and G729 / 24 Kbps).
>
>
> Alexandre
>
> Kanuri, Seshu (Company IT) wrote:
>
>> /SNIP/
>> Some corrections are needed: 6.3kbps of G723.1 will become around 17kbps
>> on the IP level without silence suppression because of the additional
>> overhead imposed by protocols like RTP, IP, etc . If you add the
>> Ethernet (or WAN protocol overhead) this will increase even more
>> (although slightly).
>>
>> Similarly, a voice stream of G729 at 8kbps will become around 24kbps on
>> the IP level, and slightly more on the Ethernet or ppp level (around 25
>> kbps).
>
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