SUMMARY: [asterisk-biz] Does VoIP Really Work for Serious Business?

[Matthew Crocker]

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