X0303 4 2008-12-16 0 0000877931 Vertical Communications, Inc. VRCC 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M C/O SPECIAL SITUATIONS FUNDS 527 MADISON AVENUE, SUITE 2600 NEW YORK NY 10022 0 0 1 0 Warrants 4 2008-12-16 4 J 0 78996 0 D 2003-12-16 2008-12-16 Common Stock 0 0 I By Limited Partnerships Warrants expired on 12/16/08 with no value. This is a joint filing by Austin W. Marxe (Marxe) & David M. Greenhouse (Greenhouse). They share voting & investment control over all securities owned by Special Situations Fund III QP, L.P. (SSFQP), Special Situations Cayman Fund, L.P. (Cay), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) & Special Situations Technology II, L.P. (Tech II), respectively. 0 Warrants are owned by SSFQP, 0 Warrants are owned by Cay, 0 Warrants are owned by PE, 0 Warrants are owned by Tech and 0 Warrants are owned by Tech II. The interest of Marxe & Greenhouse in the shares of Warrants owned by SSFQP, Cay, PE, Tech, & Tech II is limited to the extent of his pecuniary interest. Austin W. Marxe 2008-12-18 David M. Greenhouse 2008-12-18