which model ?

CVT Elon 1000 = Tricon (Othompson) now MCE
CVT 2400 = Series 90 (Othompson) Call MCE (series 90 has integrated display CVT 2400 use same boards with HandHeld and no display and board connectors are differents)
CVT Net = Ultra 2000 (Othompson ) no handheld
CVT (dont remember the Name) = Miconic A (Shindler) use a Shindler HHT

CVT Macroscan OLD no HandHeld use a Computer Terminal just HandHeld for the drive is GE OLD model