NEC Dterm Series III Black Eight Button Basic Non Display Office Phone ETJ-8-2. The NEC DTerm Series III 8-button telephone brings you 8 programmable line/feature buttons, hands-free speakerphone.NEC Part Number: ETJ-8-2Compatible Part Numbers: 570501Model Number: NEC Dterm Series IIICompatible Models: DTerm Series III 1400 2000 2400 Systems