HOUSTON, TEXAS - May 15, 2006 - It was announced today that Conroe Regional Medical Center has selected Enterprise Systems Corporation to upgrade the 3200 port Meridian 1 Option 81C voice system to CS1000 and the Symposium Express Contact Center Server. The Option 81C switch will be upgraded to Release 4.5 CS1000M system with Signaling Server. The Symposium Express Contact Center Server will be upgraded from Release 3.0 to Release 4.2.