Electra 6/16
Minimum configuration 3x8
Max 6x16
Standard or handsfree 6 line Phones
ET-6-1/3 6 BTN tel
ET-6H-1/3 6 BTN tel HF
EB-6-1/3 Busy Lamp Field

Electra 16/48
Minimum Configuration 4x4
Main KSU up to 8x24
Expansion Units 4x12
Max 16x48
8 & 16 line standard & handsfree phones
16 line Display HF phones
ET 8-2/3/4 8 BTN tel
ET 16-1 16 BTN tel
ET 16-3 16 BTN tel
ET 16H-1 16 BTN tel HF
ET 16H-3/4 16 BTN tel HF
ET 16D-3/4 16 BTN tel LCD
ED 48-1, 48-3, 48-4 DSS/BLF
EB 48-1, 48-3, 48-4 BLF

Electra Mark II
Minimum Configuration 32 ports
Max 96 ports
ETE-6-1 6 BTN tel
ETE-6D-1 6 BTN tel LCD
ETE-16-1 16 BTN tel
ETE-16D-1 16 BTN tel LCD
ETE-16K-1 16 BTN LCD/DIR
EDE-30-1 DSS/BIF

Electra 824
Minimum Configuration 4 x 12
Max 8 x 24
ETZ-16-1 16 BTN tel
ETZ-16D-1 16 BTN LCD
ETZ-24-1 DSS/BLF

NEAX 2400
ETT-16-1 16 BTN tel
ETT-8-1 8 BTN tel
ETT-4-1 4 BTN tel

NEC Professional Level 1
Minimum Configuration 4 x 8
Max 8 x 16
Pro ETW 8-1
Pro ETW 16 DC-1
Pro ETW 16 DD-1
Pro ETW 24 DS