(ShareCast News) - Cellcast has denied speculation that Google is in talks with the company to use its internet telephony technology after shares in the broadcasting company rose sharply. "The board confirms there is no truth in the article and knows of no reason for the price rise," the broadcasting company said.It said a further statement will be issued if and when appropriate.At 0942 BST, shares were up 56.8% at 1.73p.