Wireless operator Clearwire was one of two broadband providers <A HREF="http://news.zdnet.com/2100-9588_22-5657386.html?tag=zdnn.alert">causing traffic problems for Internet phone operator Vonage,</A> a Vonage spokeswoman said Wednesday. Vonage said last month that a cable operator, along with Clearwire, was suspected of blocking calls and not letting some home-phone adapters work appropriately. While identifying Clearwire, Vonage has not provided the cable operator's identity nor the exact cause of the problems. Vonage calls over Clearwire's network are now going through uninterrupted, but an issue remains with the cable operator, according to Vonage.