[Mac-telephony-list] VOIP audio quality (was Re: Apple USB modem dongle)

[Martin Joseph via List]

On Dec 20, 2006, at 11:19 AM, Amanda Walker via List wrote:

> VOIP quality depends entirely on the underlying IP connection's
> quality.  In 2003, I replaced my Verizon POTS line with a Vonage
> account.  My audio quality went up.  In 3+ years of daily use, I've
> never had problems with it.  However, I'm using it on a commercial
> dedicated T1 (static IP, low latency, not sharing any bandwidth with
> my neighbors, not oversubscribed at the other end).  VOIP over
> switched Ethernet also works beautifully.
>
> However, I've heard many reports that VOIP over a consumer-quality IP
> connection (which includes most "business DSL") is usually pretty
> bad, because residential IP service is usually pretty bad.


I am using VOIP over a consumer (low class business actually) ADSL  
connection and a Cable modem connection (both are shared line type)  
and both work very well.

The trick was to find a a call termination service (sellvoip.net for  
me) that has routes that are very short from my servers.  Initially I  
used Teliax and Nufone (I still use both as backups actually), and  
while they both worked, my routes to them were such that call quality  
issues did occur on occasion.

Marty