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
Steve Kennedy wrote:
On Mon, Jul 18, 2005 at 11:28:57AM -0600, Tim Pushor wrote:
ulaw is 64Kb/s over a p2p link (or circuit switched in the PSTN world).
If you then convert to IP there's at least a 20% overhead, can be more
depending on the situation.
Might take 100Kb/s
Thats what I thought as well, so I was wondering why ISDN is 64K, but
VOIP RTP/ulaw has been documented to be 64K per direction + packet
overhead (132K+)
ISDN is 64K per direction too, on a synchronous link i.e. 64K in both
directions.
I guess if you packetise etc then you've got to worry about both
directions and the bandwidth to supoort it ...
Steve
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