Description

Huawei CloudEngine S5731-L8T2ST-RUA Remote Unit Switch

The Huawei CloudEngine S5731-L8T2ST-RUA is a compact, fanless GE remote unit that provides 8 high-speed downlink ports. As part of Huawei’s Simplified Network Solution, it functions as an extended I/O module for a central switch, allowing for massive port expansion without the complexity of managing individual leaf switches.

Key Performance Features

High-Density Connectivity: Offers 8 x 10/100/1000Base-T ports for wired data access.
Flexible Uplinks: Equipped with 1 x GE SFP port and 1 x 10/100/1000Base-T port, providing versatile fiber or copper uplink options.
Zero-Configuration Deployment: The RU is automatically discovered, configured, and managed by the central switch (e.g., S6730-H or S12700E).
Energy Efficiency: Extremely low power consumption (typical power is less than 7W), contributing to a “green” enterprise network.
Silent Fanless Design: Ideal for noise-sensitive environments like libraries, healthcare wards, and high-end office spaces.

Performance

Forwarding performance: 15Mpps
Switching capacity: 12/120 Gbps

Accessories & Compatibility

Since this is a Remote Unit (RU), it uses a simplified hardware stack to remain compact and cost-effective.

Power Supply: Includes a standard external 12V DC power adapter.
Optical Modules: Supports Huawei GE SFP Optical Transceivers (e-SFP-GE-SX-MM850, SFP-GE-LX-SM1310, etc.).
Central Switch Requirement: Requires a Huawei “Central Switch” with RU management capabilities to function (part of the CloudCampus 3.0 architecture)

Related Huawei S5731-L Series Models

S5731-L8P2HT-RUA: The 8-port PoE+ version for powering devices.

S5731-L4T2ST-RUA: A smaller 4-port non-PoE version for tight spaces.

S6730-H Series: Recommended Central Switch to manage these RUs.

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 210.0 mm x 130.0 mm (1.06 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): 27.0 mm x 210.0 mm x 130.0 mm (1.06 in. x 8.27 in. x 5.12 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 347.0 mm x 242.0 mm (3.23 in. x 13.66 in. x 9.53 in.)
Chassis height [U]	0.61 U
Chassis material	Metal
Weight without packaging [kg(lb)]	0.84 kg (1.85 lb)
Weight with packaging [kg(lb)]	1.14 kg (2.51 lb)
Typical power consumption [W]	7.73 W (device) 7.98 W (device + power adapter)
Typical heat dissipation [BTU/hour]	26.38 (device) 27.23 (device + power adapter)
Maximum power consumption [W]	7.86 W (device) 8.11 W (device + power adapter)
Maximum heat dissipation [BTU/hour]	26.82 (device) 27.67 (device +power adapter)
Static power consumption [W]	3.23 W
MTBF [years]	84.79 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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