Specifications

16-Line, 32-Station Base Unit
Stations 10-25
Stations 26-41
Power Fail Station
(pins 3 & 4)
Grounding
Terminal
4-Line, 8-Station Base Unit
Station 10-17,
Power Fail Station
Grounding
Terminal
Station 10-25
Power Fail Station
Grounding
Terminal
8-Line, 16-Station Base Unit
DSU220DSU220
Locating The Station Connections
IMI66–132 DSU II Digital Telephone System
2 – 18 Installing The DSU II Digital Telephone System