Executone IDS M48 48-Button DSS/BLF Console (Black/Refurbished)This Executone IDS M48 DSS BLF console features 44 programmable keys. More Information Part# 84400 4 fixed function keys: Trasfer Conference, Program, Volume Up, Volume Down. Can be associated with any IDS telephone to increase the number of programmable keys available. Any feature which can be programmed on a telephone key can be programmed on the programmable keys of the DSS Console. The fixed function keys on the DSS Console make those functions