Yeah that makes perfect sense, and was the way that I was initially
calculating bandwidth requirements and codec costs. I just found it odd
that bandwidth was reported both in simplex and duplex. It just confused
me (which doesn't seem to be too difficult, these days ;-)
Thanks,
Tim
Dan Perik wrote:
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
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