I HAVE A BOGEN PCM200C PAGING SYSTEM THAT WAS OPERATING ON A OPT11C PROGRAMMED AS A WATS TRUNK AND WORKED FINE, THEY UPGRADED THIER SYSTEM TO CS1000E 5.0 AND WHEN YOU ACCESS THE PAGE PORT IT BEEPS TWICE FROM THE PAGING SYSTEM AS NORMAL BUT WHEN YOU DIAL ANY OTHER DIGITS AFTER THE BEEP THE TRUNK DROPS AND YOU GET A FAST BUSY. ANY SUGESTIONS?