Contents4.3.1 Overview 500NMD11.........................................................................................234.3.2 Front view and connector 500NMD11...........................................................234.3.3 Device data 500NMD11....................................................................................244.4 Compact device 500NMD20............................................................................................ 254.4.1 Overview 500NMD20........................................................................................254.4.2 Front view and connectors 500NMD20....................................................... 264.4.3 Device data 500NMD20...................................................................................264.5 Compact device 500NMD30............................................................................................ 274.5.1 Overview 500NMD30........................................................................................274.5.2 Front view and connectors 500NMD30....................................................... 284.5.3 Device data 500NMD30...................................................................................284.6 General data........................................................................................................................ 294.7 Connections........................................................................................................................ 304.7.1 Ethernet interfaces (Port1 - Port4)............................................................... 304.7.2 SFP Interfaces (Fo1 - Fo2)............................................................................... 314.7.3 DSL interfaces (X3 - X4)...................................................................................314.7.4 Serial Interfaces (Con0 - Con1)...................................................................... 334.7.5 Power connector (X1).......................................................................................344.7.6 Alarm-Relay (X2)................................................................................................ 354.7.7 Extension interface (EXT)............................................................................... 364.8 Display elements................................................................................................................ 364.9 Controls................................................................................................................................ 374.9.1 Reset Button...................................................................................................... 374.10 Accessories.......................................................................................................................... 374.10.1 Optical SFP Modules........................................................................................ 374.10.2 Other accessories............................................................................................. 385 Maintenance........................................................................................................................... 416 Glossary.................................................................................................................................. 434 1KGT150966 V000 1