[Asterisk-Users] internet bandwidth

[Vlasis Hatzistavrou]

Hello Michael,

Sorry for the late reply. The 17kbps are for the G723.1 at 6.3kbps. The 
additional overhead which increases the bandwidth usage etc depends on 
the codec. It's not a fixed overhead in bandwidth for all codecs.

You can find a few free codec/bandwidth calculators at:

http://www.voipcalculator.com
http://www.packetizer.com

Best regards,
Vlasis.

Michael Vogel wrote:

> Hi!
>
> Vlasis Hatzistavrou schrieb:
>
>> 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 .
>
>
> These 17kbps are they independent from codec? That means a A-LAW with 
> 64kbps has got 64+17=81kbps?
>
> BTW: I have seen different descriptions regarding the rate of U-LAW. 
> Is it 64 or 56kbps?
>
>> If you chose IAX instead of SIP, you will save lots of bandwidth if 
>> all (or most) of those 20 calls are directed to the same host.
>
>
> Does IAX save bandwith on single calls as well?
>
> Bye!
>
> Michael
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