On Mar 10, 2006, at 8:24 AM, Hugh L. Johnson wrote:
It's all about latency. The roundtrip ping times across my DSL
circuit
(Verizon ATM cloud) to my ISP's router (One hop away) are approx 25ms.
My ISP has a PRI which I use for all incoming and local outgoing
calls.
For these calls the quality is better than when I had an analog
phone at
home.
No, it is all about jitter. Latency is irrelevant unless it is above
150-200ms. Rapidly changing latency (aka Jitter) is what kills VoIP
quality because the echo cancelers can't train up properly.
--
Matthew S. Crocker
Vice President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710
http://www.crocker.com
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