Description

Huawei CloudEngine S5731S-L4P2HW-RUA Remote Unit (4-Port PoE+)

The Huawei CloudEngine S5731S-L4P2HW-RUA is an advanced Gigabit Remote Unit (RU) engineered for the next generation of optical-electrical synergistic networks. This unit features 4 x 10/100/1000Base-T PoE+ ports and specialized Hybrid Fiber-Copper (HW) uplinks, allowing it to receive both high-speed data and remote power over a single hybrid cable. It is the definitive choice for deployments where local power outlets are unavailable or where centralized power management is critical.

Key Features & Technological Advantages

Hybrid Fiber-Copper Uplink: Equipped with 2 x GE SFP/Hybrid ports, supporting Huawei’s innovative hybrid cable solution. This allows for data transmission at light speed while drawing power from a central switch over kilometers.
Efficient PoE+ Delivery: 4 x Gigabit downlink ports support IEEE 802.3at PoE+, providing up to 30W per port for Wi-Fi 6 APs, smart sensors, and IP cameras.
Simplified “Zero-Touch” O&M: Functioning as a remote I/O module of the central switch, it requires no independent IP management or on-site configuration.
Compact & Fanless Design: Completely silent (0 dB) operation with a small footprint, ideal for installation in ceilings, walls, or tight cabinets.
Extended Reach: Overcomes the 100-meter limit of traditional Ethernet cables, supporting remote access and powering up to 300m–1000m (depending on hybrid cable specs).

Performance

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

Remote Powering & Accessories

The S5731S-L4P2HW-RUA is built for flexible powering scenarios:

Hybrid Cable Support: Can be powered directly by a Central Switch with Hybrid Optical-Electrical Ports (e.g., specific S6730-H models).
Optional Local Power: Also supports local DC power adapters if remote power is not utilized.
Hybrid Transceivers: Compatible with Huawei Hybrid Optical Modules for simultaneous data and power transmission.

Why Buy S5731S-L4P2HW-RUA?

Solve Power Challenges: Perfect for historic buildings or outdoor-facing indoor spots where running new electrical wires is expensive.
Centralized Backup: Since power comes from the central switch, all connected RUs can be backed up by a single UPS in the main server room.
Future-Proof: Designed for the growing trend of “Fiber-to-the-Room” (FTTR) in enterprise campus networks.

Specification

Item	Specification
Dimensions without packaging (H x W x D) [mm(in.)]	Basic dimensions (excluding the parts protruding from the body): 45.0 mm x 90.0 mm x 75.0 mm (1.77 in. x 3.54 in. x 2.95 in.) Maximum dimensions (the depth is the distance from ports on the front panel to the parts protruding from the rear panel): 45.0 mm x 90.0 mm x 75.0 mm (1.77 in. x 3.54 in. x 2.95 in.)
Dimensions with packaging (H x W x D) [mm(in.)]	92.0 mm x 340.0 mm x 222.0 mm (3.62 in. x 13.39 in. x 8.74 in.)
Chassis height [U]	1 U
Chassis material	Metal
Weight without packaging [kg(lb)]	0.98 kg (2.16 lb)
Weight with packaging [kg(lb)]	1.36 kg (3 lb)
Typical power consumption [W]	6.67 W (device) 8.26 W (device + power adapter)
Typical heat dissipation [BTU/hour]	22.76 (device) 28.18 (device + power adapter)
Maximum power consumption [W]	Without PoE: 7.00 W (device)/8.59 W (device + power adapter) Full PoE load: 88.5 W (PoE: 77 W)
Maximum heat dissipation [BTU/hour]	Without PoE: 23.88 (device)/29.31 (device + power adapter) Full PoE load: 301.97
Static power consumption [W]	5.62 W
MTBF [years]	75.17 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 hybrid optical-electrical ports and power adapters, cold backup between two hybrid optical-electrical ports, and preferential power supply by power adapters
Long-term operating temperature [°C(°F)]	–5°C to +40°C (23°F to 104°F) at an altitude of 0-1800 m (0-5905.44 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 the device ranges from -5°C to +40°C (23°F to 104°F) when the following optical modules are used: – GE industrial 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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