Klausner Technologies [NPE] filed suit against Aastra Technologies, Digium, MagicJack, and YMax over two patents related to visual voicemail.  Klausner has filed suit eight prior times against over 30 defendants including Apple, NEC, Qwest, RIM, Samsung, Toshiba, Verizon, and Vonage.  Klausner Technolgies is led by the named inventors on the patents-in-suit, Judah Klausner and Robert Hotto.  9/13, Eastern District of Texas, 6:2011cv00480.