The board list for the OptiX RTN 620 is given below.
| Board | Description |
|---|---|
| IF1A | The 1-port 48V Isolation Intermediate Frequency Board. |
| SL1 | The 1-port STM-1 Board. |
| IF1B | The 1-port 48V Non-isolation Intermediate Frequency Board. |
| SDE | The 2-port STM-1 Electrical Board. |
| SLE | The 1-port STM-1 Electrical Board. |
| PH1 | The 16-port E1 Tributary Board. |
| PO1 | The 8-port E1 Tributary Board. |
| SD1 | The 2-port STM-1 Board. |
| PXC | Integrated cross-connect and clock board. |
| EOW | The Orderwire Board. |
| SCC | The System Control and Communication Board. |
| FAN | The Fan Board. |
| ODU | The Outdoor Unit Virtual Board. |
| EFT4 | 4-port 10M/100M Ethernet Transparent Transmission Board. |
| PD1 | 32 x E1 Tributary Board |
| PL3 | 3 x E3/T3 Tributary Board |
| SL4 | 1 x STM-4 Optical Interface Board |
| IFX | XPIC Intermediate Frequency Board |
| IF0A | Isolated PDH Intermediate Frequency Board |
| IF0B | Non-isolated PDH Intermediate Frequency Board |
| EMS6 | 4xFE+2xSFP(FE/GE) Ethernet Mixed Switching Board |
| IFH2 | Hybrid Intermediate Frequency Board with High Capacity |
| EFP6 | 6-Port Fast Ethernet Switching Processing Board based on PDH |
| TCU | Temperature Control Unit |
| PMU | Power and Environment Monitoring Unit. |
| EGS4 | 2-Port RJ45 + 2-Port SFP/RJ45 Gigabit Ethernet Switching Processing Board |