Do you know Huawei S7700 switch and some important notes?

Huawei S7703: Supports two Main Control Units (MCUs), three Line Processing Units (LPUs), and AC or DC power modules in 1+1 backup mode.

S7706: Supports two Switching and Routing Units (SRUs), six LPUs, and AC or DC power modules in 1+1 or 2+2 backup mode.

S7712: Supports two SRUs, twelve LPUs, and AC or DC power modules in 1+1 or 2+2 backup mode.

• The S7703 chassis integrates the PoE and non-PoE models. The S7706 and S7712 have PoE chassis and non-PoE chassis. A PoE chassis is identified by PoE on the nameplate and power supply slots.
• Huawei S7700 switch includes FCC-certified chassis and common chassis.