|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Clearwire May Block VoIP Competitors
> From [email protected] Sat Mar 26 12:37:15 2005 > Date: Sat, 26 Mar 2005 13:35:31 -0500 > From: Eric Gauthier <[email protected]> > To: "Fergie (Paul Ferguson)" <[email protected]> > Cc: [email protected] > Subject: Re: Clearwire May Block VoIP Competitors > > > > http://www.advancedippipeline.com/news/159905772 > > > > "...In what the company claims is an effort to preserve the performance > of its pre-standard WiMAX network, Clearwire says it reserves the right > to prohibit the use of a wide range of bandwidth-hungry applications, a > list that apparently includes VoIP as well as the uploading or > downloading of streaming video or audio, and high-traffic Web site > hosting." > > Hrm... Isn't a VoIP call realtively low bandwidth? "*ALL* things are relative." <grin> > I haven't studied > this, but Vonage's site seems to imply that the maximum data rate is 90Kbps > (http://www.vonage.com/help_knowledgeBase_article.php?article=190). I > typically see speeds greater than this from my web browser... There's a big difference. web browser activity is typically *very* bursty. 'Average' data rate for a any single user is probably in the range of 1%-3% of the burst peaks. VoIP, on the other hand, has an "average" utilization that approximates 50% of the burst rate. In _both directions. I suspect that that latter factor is a fair part of the "problem". That the cable company has allocated fairly limited bandwidth for the 'upstream' direction (from the customer to the head-end). That that 'available' bandwidth is *grossly* over-subscribed, on the "presumption" that traffic in that direction would generally be "small", and "infrequent". When those assupmtions get violated, _everything_ goes to h*ll. <wry grin> Not just for 'he who' commits the violation, but everybody else who is sharing that over-subscribed link. This is what happens when you sell "up to $BIGNUM" connectivity, without discussing a minimum CCIR promise. IF a customer does get throttled/blocked, they might have some fun with a false advertising assertation.
|