[Asterisk-Users] Codecs and bandwidth

[Dan Perik]

If you include down + up, yes, it's actually about 150-160 using uLaw + 
IP/UDP/RTP/signaling overhead.  But that's a little misleading, I think. 

1/2 of that (~75-80) is down, 1/2 of that (~75-80) is up.  So if you 
have, say, a 1.5Mbps down/384 up DSL connection, you can do up to 4 
calls simultaneously.  80*4 = 320.  You'd be using 320kbps down and 
320kbps up, which is within your 1500kbps down / 384 kbps up.

Someone please correct me if I'm wrong.

- Dan

Tim Pushor wrote:

> Of course - ISDN is bi-directional. I guess saying that ULAW takes 
> 130K+ bandwidth depending on the framing type (local lan, w/1 hop, 
> vlan, etc) is not very clear. Thats total bandwidth. With lots of us 
> at home and small business using asynchronous connections - we need to 
> keep that in consideration.
>
> Thanks for helping clear that up.
>
> Tim
>