Just when beleaguered internet telephone company Vonage Holdings Corp. seemed to be off the hook, having resolved the nasty little tiff with Sprint several weeks earlier for a cool $80 million, disaster (probably too melodramatic a word, but, eh) strikes again in a similar form as before. Vonage disclosed today that it is being sued by AT&T Inc. for alleged patent infringement. In a filing with the Securities and Exchange Commission, the company said AT&T's lawsuit, filed Wednesday in a U.S. district court in Madison, Wis., pertains to a patent on a wide-area packet-telephony system. Vonage said it has been in discussions with AT&T to resolve the dispute, but it also said it can't guarantee the case won't go to trial.
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