The board list for the OptiX RTN 905 is given below.
| Board | Description |
|---|---|
| CSHI | Hybrid radio system control, switching, and timing board (type I) |
| ISU3 | Universal IF Board |
| PIU | power board |
| FAN | fan board |
| EG6 | 4xGE(e) + 2xGE(o) Interface Board |
| TS2 | 2-Port TDM Concatenation Interface Board |
| SP3S | 16xE1 tributary board |
| AUX | Auxiliary Interface Board |
| PMU | ODC Power Monitoring Unit |
| TCU | Temperature Control Unit |
| ODU | Outdoor Unit |
| ISV3 | Versatile IF Board |
| CSHP | Hybrid system control, switching, and timing board |
| VS2 | 2-port versatile cascading interface board |
| MP1 | 16xE1 interface board |
| CD1 | 2-port channelized STM-1 interface board |
| MN1 | Multiple-protocol Null port circult emulation extended board |