Description

Huawei CloudEngine S5731S-L8P2ST-RUA Remote Unit (8-Port PoE+)

The Huawei CloudEngine S5731S-L8P2ST-RUA is a high-density, full-Gigabit Remote Unit (RU) designed for modern campus networks. It features 8 x 10/100/1000Base-T PoE+ ports, providing both high-speed data and up to 30W of power per port to terminal devices. With its versatile dual-media uplink (1 x GE SFP + 1 x GE RJ45), it offers maximum flexibility for fiber or copper backhaul, making it the ideal “all-in-one” edge access solution.

Key Features & Product Highlights

High-Density PoE+ Access: 8 Gigabit ports support IEEE 802.3at PoE+, allowing you to power a dense cluster of devices such as Wi-Fi 6 APs, VoIP phones, and security cameras from a single unit.
Flexible Dual-Media Uplinks: Equipped with 1 x GE SFP and 1 x 10/100/1000Base-T uplink ports. This ensures compatibility with any existing room cabling, whether you use fiber-optic for distance or copper for shorter runs.
Zero-Configuration “Plug-and-Play”: As part of the Huawei Simplified Network solution, this RU requires no local configuration. It is managed as a virtual extension of the central switch, simplifying O&M.
Fanless Silent Operation: 0 dB noise design allows the unit to be installed directly in workspace environments without acoustic distraction.
Space & Cable Efficiency: One single uplink cable to this RU replaces eight individual cables from the main equipment room, reducing cabling costs by up to 80%.

Performance

Forwarding performance: 15Mpps
Switching capacity: 20/120 Gbps

Accessories & Compatibility

Power Supply: Requires an external 54V DC power adapter (typically the Huawei 150W version).
Optical Modules: Compatible with all standard Huawei GE SFP modules (SX/LX/BIDI).
Central Switch Support: Requires a Huawei Central Switch (e.g., S6730-H, S12700E) to function as a managed entity.

Why Choose S5731S-L8P2ST-RUA?

Ultimate Versatility: The “ST” uplink means you are never stuck—if the site has fiber, use SFP; if it has copper, use RJ45.
High Device Density: Perfectly handles areas with high concentrations of powered devices (IoT, APs, Phones).
Low Maintenance: No fans and no local management interface mean fewer points of failure and no need for specialized on-site IT staff.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 38.0 mm x 210.0 mm x 130.0 mm (1.5 in. x 8.27 in. x 5.12 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 38.0 mm x 210.0 mm x 130.0 mm (1.5 in. x 8.27 in. x 5.12 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 375.0 mm x 242.0 mm (3.23 in. x 14.76 in. x 9.53 in.)
Chassis height [U]	0.86 U
Chassis material	Metal
Weight without packaging [kg(lb)]	1.59 kg (3.51 lb)
Weight with packaging [kg(lb)]	1.98 kg (4.37 lb)
Typical power consumption [W]	9.69 W (device) 11.36 W (device + power adapter)
Typical heat dissipation [BTU/hour]	33.06 (device) 38.76 (device + power adapter)
Maximum power consumption [W]	Without PoE: 10.0 W (device)/11.67 W (device + power adapter) Full PoE load: 146.0 W (PoE: 131 W)
Maximum heat dissipation [BTU/hour]	Without PoE: 34.12 (device)/39.82 (device + power adapter) Full PoE load: 498.17
Static power consumption [W]	6.48 W
MTBF [years]	75.78 years
Availability	> 0.99999
Noise at normal temperature (acoustic power) [dB(A)]	Noise-free (no fans): < 30
Noise at normal temperature (acoustic pressure) [dB(A)]	Noise-free (no fans): < 20
Number of card slots	0
Number of power slots	0
Number of fans modules	0
Redundant power supply	Not supported
Long-term operating temperature [°C(°F)]	-5°C to +45°C (23°F to 113°F) at an altitude of 0-1800 m (0-5906 ft.)
Restriction on the operating temperature variation rate [°C(°F)]	When the altitude is 1800-5000 m (5905.44-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (721.78 ft.). The device cannot start when the temperature is lower than 0°C (32°F). The operating temperature of a device ranges from -5°C to +45°C (23°F to 113°F) when the device uses the following optical modules: – GE optical modules with a transmission distance of less than or equal to 10 km
Storage temperature [°C(°F)]	–40°C to +70°C (–40°F to +158°F)
Long-term operating relative humidity [RH]	5% RH to 95% RH, non-condensing
Long-term operating altitude [m(ft.)]	0–5000 m (0–16404 ft.)
Storage altitude [m(ft.)]	0-5000 m (0-16404 ft.)
Power supply mode	Power adapter
Rated input voltage [V]	Power adapter input: 100–240 V AC; 50/60 Hz Power adapter output: 56 V DC
Input voltage range [V]	Power adapter input: 90–290 V AC; 47–63 Hz
Maximum input current [A]	2.68 A
Memory	–
Flash memory	–
Console port	Not supported
Eth Management port	Not supported
USB	Not supported
RTC	Not supported
RPS input	Not supported
Service port surge protection [kV]	Common mode: ±6 kV
Power supply surge protection [kV]	Power adapter: ±6 kV in differential mode and ±6 kV in common mode
Ingress protection level (dustproof/waterproof)	IP20
Types of fans	None
Heat dissipation mode	Natural heat dissipation
Airflow direction	–
PoE	Supported
Certification	EMC certification Safety certification Manufacturing certification

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