[asterisk-dev] UDP packets are transmiting in small package or big package?

[Dinesh Nair]

On 09/05/06 15:05 Ma Zhiyong said the following:
> Sometimes we need improve bandwidth usage, such as I want to use 2M
> bandwidth to do 150 concurrent SIP calls. I use 8k speex codec. You
> know, 150*8k equal 1.2M. It seems 2M is enough.
> 
> But no. In my experience, 90 concurrent calls is overflowed.

you're neglecting to add the IP and RTP header overheads to your 
calculations. this is about 20kbps per RTP stream/direction, so 150 calls 
would add about 3Mbps on top of your 1.2Mbps. at 90 calls, you're running 
2.52Mbps in total.

-- 
Regards,                           /\_/\   "All dogs go to heaven."
dinesh at alphaque.com                (0 0)   http://www.openmalaysiablog.com/
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