Description

Huawei CloudEngine S5731S-L4T2ST-RUA Remote Unit (4-Port Gigabit)

The Huawei CloudEngine S5731S-L4T2ST-RUA is a highly versatile, non-PoE Gigabit Remote Unit (RU) designed for the Huawei Simplified Network Solution. Featuring 4 x 10/100/1000Base-T downlink ports and a flexible dual-media uplink (1 x SFP + 1 x RJ45), this unit is the perfect edge access solution for environments where both fiber and copper backhaul options are required.

Key Features

Versatile Connectivity: 4 Gigabit Ethernet ports provide reliable wired access for PCs, printers, and other non-PoE networked devices.
Flexible Dual Uplinks: Includes 1 x GE SFP port and 1 x 10/100/1000Base-T port. This allows the unit to connect to the central switch via fiber-optic cable for long distances or standard CAT6 cable for shorter runs.
Fanless Silent Operation: The 0 dB noise-level design makes it invisible in quiet environments such as library study carrels, hotel rooms, and private offices.
Simplified Architecture: Acts as a remote I/O module of a Huawei central switch. It inherits all configurations from the central device, requiring zero local management.
Ultra-Compact Form Factor: Its sleek, small design allows for discreet mounting in wall boxes or under desks, saving valuable workspace.

Performance

Forwarding performance: 7.5Mpps
Switching capacity: 10/120 Gbps

Compatible Accessories

Power Supply: Ships with a compact external AC/DC 12V power adapter.
SFP Modules: Supports Huawei certified Gigabit SFP transceivers (Single-mode/Multi-mode).
Patch Cables: Compatible with standard Cat5e/Cat6/Cat6A copper cables and LC-LC fiber jumpers.
Central Switch Support: Compatible with CloudEngine S6730-H, S5731-H, and S12700E series.

Why Choose S5731S-L4T2ST-RUA?

Media Flexibility: The “ST” uplink configuration means you don’t have to worry about the existing cabling infrastructure; whether it’s fiber or copper, this RU can connect.
Zero Maintenance: Since all management is centralized, there is no need to dispatch IT staff to individual rooms for troubleshooting or updates.
Low Power Consumption: Optimized for minimal electricity usage, reducing the carbon footprint of your office network.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 27.0 mm x 185.0 mm x 115.0 mm (1.06 in. x 7.28 in. x 4.53 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 27.0 mm x 185.0 mm x 115.0 mm (1.06 in. x 7.28 in. x 4.53 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 342.0 mm x 228.0 mm (3.23 in. x 13.46 in. x 8.98 in.)
Chassis height [U]	0.61 U
Chassis material	Metal
Weight without packaging [kg(lb)]	0.74 kg (1.63 lb)
Weight with packaging [kg(lb)]	1.02 kg (2.25 lb)
Typical power consumption [W]	4.88 W (device) 5.08 W (device + power adapter)
Typical heat dissipation [BTU/hour]	16.65 (device) 17.33 (device + power adapter)
Maximum power consumption [W]	5.06 W (device) 5.26 W (device + power adapter)
Maximum heat dissipation [BTU/hour]	17.27 (device) 17.95 (device + power adapter)
Static power consumption [W]	2.62 W
MTBF [years]	83.23 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: 12 V DC
Input voltage range [V]	Power adapter input: 90–290 V AC; 47–63 Hz
Maximum input current [A]	1 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	Not supported
Certification	EMC certification Safety certification Manufacturing certification

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