There is a lot of people who take less than 30 seconds to beat up on incumbents and their business practices. VoIP blockage, oh it must be SBC or Comcast. Never mind that these companies are under such heavy scrutiny from federal regulators and consumer watchdogs. The sweet irony is that everytime someone has blocked VoIP calls, well it has been some sort of an independent or a start-up. One Vonage customer has claimed that his calls have been blocked by Clear Wire, Craig McCaw’s fixed wireless start-up. Gerry Salemme, an executive vice president at the Kirkland, Wash.-based Clearwire, told Advanced Pipeline that “some technologies used by Vonage and other VoIP providers are problematic for wireless networks, versus a wired network.”. Salemme also confessed that he had not read his company’s terms of service. So one cannot take him too seriously. Vonage officials are clearly unhappy. However Clear Wire is not a phone company or a cable operator, so going to FCC isn’t going to help much. As a word of caution, since this is an isolated case, its time to take a little pause … after all one swallow doesn’t make a summer.