Description

Huawei CloudEngine S5731S-L16P2SR-RUA Remote Unit (16-Port PoE+)

The Huawei CloudEngine S5731S-L16P2SR-RUA is a high-density, full-Gigabit Remote Unit (RU) designed to simplify large-scale campus network expansion. Featuring an impressive 16 x 10/100/1000Base-T PoE+ ports and 2 x GE SFP optical uplinks, this unit provides massive terminal connectivity and robust power delivery. It is the ultimate solution for “Fiber-to-the-Room” or “Fiber-to-the-Desktop” scenarios where high device density is required.

Key Features & Product Highlights

Massive 16-Port PoE+ Density: Provides 16 Gigabit ports, all supporting IEEE 802.3at PoE+ (up to 30W per port), perfect for powering dense clusters of Wi-Fi 6 APs, IP phones, and smart sensors.
Redundant SFP Optical Uplinks: Equipped with 2 x GE SFP ports, allowing for redundant fiber backhaul (Dual-homing) or daisy-chaining multiple RUs to a central switch.
Simplified “Zero-Touch” Management: Managed as a remote expansion card of the central switch (e.g., S6730-H). It inherits all configurations automatically, eliminating the need for on-site software management.
Fanless Silent Operation: Despite its 16-port capacity, the advanced thermal design ensures 0 dB noise, making it ideal for quiet high-density workspaces.
Significant Cabling Savings: One fiber pair to this 16-port RU replaces sixteen long-run copper cables from the server room, reducing cabling costs and ELV room space requirements by up to 80%.

Performance

Forwarding performance: 27Mpps
Switching capacity: 36/120 Gbps

Accessories & Compatibility

Power Supply: Requires a high-wattage external 54V DC power adapter (e.g., Huawei 280W AC/DC adapter) to support the full 16-port PoE load.
Optical Modules: Fully compatible with Huawei GE SFP modules (SX/LX/BIDI).
Mounting Kits: Supports wall-mount, under-desk mount, and desktop placement.
Central Switch Support: Requires a Huawei Central Switch (e.g., CloudEngine S6730-H, S12700E) to function as a managed entity.

Why Choose S5731S-L16P2SR-RUA?

Ideal for High-Density Areas: One unit can serve an entire large conference room or a bank of 16 office desks.
Fiber-Optic Reliability: The dual SFP uplinks provide the bandwidth and redundancy needed for 16 gigabit users.
Future-Proof Performance: Ready for next-generation Wi-Fi 6/7 deployments and massive IoT integration.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 43.6 mm x 442.0 mm x 260.0 mm (1.72 in. x 17.40 in. x 10.24 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 43.6 mm x 442.0 mm x 267.0 mm (1.72 in. x 17.40 in. x 10.51 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	90.0 mm x 555.0 mm x 400.0 mm (3.54 in. x 21.85 in. x 15.75 in.)
Chassis height [U]	1 U
Chassis material	Metal
Weight without packaging [kg(lb)]	3.19 kg (7.03 lb)
Weight with packaging [kg(lb)]	3.83 kg (8.44 lb)
Typical power consumption [W]	16.42 W
Typical heat dissipation [BTU/hour]	56.03 BTU/hour
Maximum power consumption [W]	Without PoE: 16.7 W Full PoE load: 160.45 W (PoE: 125 W)
Maximum heat dissipation [BTU/hour]	Without PoE: 56.98 Full PoE load: 547.47
Static power consumption [W]	9.28 W
MTBF [years]	78.68 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 to 1800 m (0 to 5905.44 ft.)
Restriction on the operating temperature variation rate [°C(°F)]	When the altitude is 1800-5000 m (5906-16404 ft.), the highest operating temperature reduces by 1°C (1.8°F) every time the altitude increases by 220 m (722 ft.). Devices cannot start when the temperature is lower than 0°C (32°F).
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	AC built-in
Rated input voltage [V]	AC input: 100–240 V AC; 50/60 Hz
Input voltage range [V]	AC input: 90 V AC to 300 V AC; 47 Hz to 63 Hz
Maximum input current [A]	3 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]	Differential mode: ±6 kV; common mode: ±6 kV
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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Methods	Tools	Time	Destination
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Marine	Vessel	30~45 days	Seaport
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