MobiTV sent a letter to Howardforums.com, asking the site to take down links that provide MobiTV streams from Fox News, MSNBC, Animal Planet and other networks when entered in the Web browsers of certain phones.
After Howardforums refused to comply, MobiTV sent a letter Thursday to the site's Web host, Atlanta-based Global Net Access LLC, asking that it shut down Howardforums.
Calls to MobiTV and Global Net Access were not returned. The site was still up on Friday afternoon, and Choi said Global Net Access had not been in touch with him.
Sprint charges $9.99 per month for access to 100 MobiTV channels.
Toronto-based Howardforums.com has 795,000 users, of whom 200 are paying, according to Choi. It is focused on cell phones and cell carriers.
In an e-mail, Choi said he has complied with cease-and-desist letters from copyright owners before, when users posted pirated software. But in this case, he said, the posting simply contains links to MobiTV's Web site, which is accessible to anyone on the Internet.
"These feeds do not appear to be protected in any way, and it appears anyone with a compatible phone can view them," Choi wrote in a posting. He questioned why MobiTV was operating its service without authenticating its subscribers.
A MobiTV lawyer responded that the specific MobiTV Web address was obtained in violation of the company's intellectual property rights, according to Choi.
In a similar case, Web sites last year posted a 16-digit numerical key that can be used to decrypt HD DVDs. Some sites were served with cease-and-desist letters from the industry group that governs the encryption technology, but the key was reproduced on hundreds of sites and was even printed on T-shirts as a statement against overzealous copyright enforcement.
By Peter Svensson