NEC 680012 DCL-60-1 60-Button DSS Console (Black/Refurbished)Key Features: Mfr. Part #: 680012 Digital Terminal: DT330, DT730, DT750 SERIES The DSS Console has 60 programmable line keys It gives a keyset user a Busy Lamp Field (BLF) and one button access to extensions, trunks, and system features The DSS Console provides an additional 60 programmable keys There are also two keys that allow "shifting" between the first and second set of 100 extensions 60 programmable Direct Station Selection (DSS) keys (Refer to