[Asterisk-Users] concurrent calls

Olle E. Johansson
Thu, 09 Oct 2003 10:46:52 -0000

WipeOut wrote:

> duncan wrote:
>
>>
>> actually i meant how to find out how many i could push down the 512k
>> line - with regards to codec bandwidth and signalling etc...
>>
> Measure the data rate on one call and divide 512k by it for a rough
> estimate..
>
> If you want more accuracy make one call and measure the data rate, then
> two calls and then 3 calls and you should start to see a trend in the
> increse in traffic per call..
>
> My tests on one call showed GSM to use about 34Kbps* so you should
> manage 14 concurrent calls.. As a suggestion look at using the iLBC
> codec which in my test on one call used 25Kbps* which will give you
> close to 20 calls in your 512K connection..
Some pointers to whitepapers and online bandwidth calculators:
http://www.voip-info.org/wiki-Bandwidth+consumption

/O