Description

Huawei CloudEngine S5731S-L4P2HT-RUA Remote Unit (4-Port PoE+)

The Huawei CloudEngine S5731S-L4P2HT-RUA is a high-efficiency Gigabit Remote Unit (RU) designed for modern simplified campus networks. Featuring 4 x 10/100/1000Base-T PoE+ ports and a flexible GE SFP/RJ45 hybrid uplink, this unit enables seamless data and power distribution at the network edge. Its fanless design and zero-configuration capability make it a “set-and-forget” solution for high-end workspace connectivity.

Key Features

Reliable PoE+ Powering: All 4 downlink ports support IEEE 802.3at PoE+, delivering up to 30W per port for devices like Wi-Fi 6 Access Points, VoIP phones, and IP cameras.
Flexible Hybrid Uplinks: Equipped with 1 x GE SFP and 1 x 10/100/1000Base-T combo ports. This provides the flexibility to use fiber-optic for long-distance backhaul or copper Ethernet for existing short-range connections.
Zero-Configuration Deployment: As a Remote Unit, it functions as a remote service card for a central switch (e.g., S6730-H). It requires no independent management, significantly reducing on-site engineering costs.
Whisper-Quiet Fanless Design: With 0 dB noise output, it is perfect for environments where silence is mandatory, such as libraries, hospital wards, and luxury hotel suites.
Compact & Durable: Its small form factor allows for installation in limited spaces, including wall-mount boxes, ceiling voids, or under-desk brackets.

Performance

Forwarding performance: 9Mpps
Switching capacity: 12/120 Gbps

Accessories & Compatibility

Power Adapter: Requires an external 54V DC power supply (typically a Huawei 150W AC/DC adapter).
Optical Modules: Fully compatible with Huawei GE SFP modules (SX Multimode / LX Singlemode).
Mounting Options: Supports wall mounting, DIN rail mounting, and standard desktop placement.
Central Switch: Works in conjunction with Huawei CloudEngine S6730-H, S5731-H, or S12700E series.

Why Choose S5731S-L4P2HT-RUA?

Lower Infrastructure Cost: By deploying RUs near terminals, you reduce the need for multiple long-run copper cables, saving up to 70% on horizontal cabling materials.
Simplified O&M: Manage hundreds of RUs as a single logical switch. Firmware updates and configurations are pushed automatically from the central switch.
High Reliability: The fanless design removes a common point of failure (mechanical fans), ensuring a longer service life and higher MTBF.

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 185.0 mm x 115.0 mm (1.5 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): 38.0 mm x 185.0 mm x 115.0 mm (1.5 in. x 7.28 in. x 4.53 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	82.0 mm x 270.0 mm x 178.0 mm (3.23 in. x 10.63 in. x 7.01 in.)
Chassis height [U]	0.86 U
Chassis material	Metal
Weight without packaging [kg(lb)]	0.60 kg (1.32 lb)
Weight with packaging [kg(lb)]	0.81 kg (1.79 lb)
Typical power consumption [W]	6.82 W (device) 8.30 W (device + power adapter)
Typical heat dissipation [BTU/hour]	23.27 (device) 28.32 (device + power adapter)
Maximum power consumption [W]	Without PoE: 7.00 W (device)/8.48 W (device + power adapter) Full PoE load: 88.0 W (PoE: 77 W)
Maximum heat dissipation [BTU/hour]	Without PoE: 23.88 (device)/28.94 (device + power adapter) Full PoE load: 300.265
Static power consumption [W]	4.88 W
MTBF [years]	73.98 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	Cold backup of uplink hybrid optical-electrical ports or electrical ports and power adapters, cold backup of uplink hybrid optical-electrical ports and electrical ports, and preferential power supply by power adapters (By default, no power adapter is provided, and the power adapter 02221024 can be used.)
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 PoE_IN
Rated input voltage [V]	Power adapter input: 100–240 V AC; 50/60 Hz PoE input: 56 V DC
Input voltage range [V]	Power adapter input: 90–290 V AC; 47–63 Hz PoE input: 54–57 V DC
Maximum input current [A]	1.8 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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