The DCOSS converts any windows based PC (Windows NT/2000/XP) into a central office complete with T1 and/or E1 trunks as well as Analog and/or BRI ISDN phone interfaces. The DCOSS supports a multitude of protocols including CAS, PRI ISDN, SS7 and GR-303. The DCOSS supports manual and automated Bulk Calling and can simulate a wide variety of traffic