Fresh off its legal wins over Vonage Holdings Corp. and Voiceglo Communications (which no longer exists), Sprint Nextel Corp. now is suing four competitive providers for the same Voice over Packet (VoP) patent infringement. The struggling wireless and wireline carrier said Thursday that NuVox Communications, Broadvox Holdings LLC, PAETEC and Big River Telephone Co. all are infringing at least six ... (288 words)

More...