Q: How do the thermal tolerance, surge protection, and heat dissipation design of H802EX2 ensure 99.999% carrier-grade availability in outdoor and rugged sites?

Constructed with industrial-grade components, the H802EX2 supports an ultra-wide operating temperature profile of -40°C to +65°C, ensuring reliable cold-boot operations inside outdoor FTTx cabinets (such as Huawei F01D/F01S series). The board integrates surge suppression compliant with ITU-T K.20/K.21 (common-mode 6kV lightning surge protection) and utilizes high-reliability multi-layer ENIG PCB with protective conformal coating operating at 5%-95% non-condensing relative humidity. Cooling is managed by the OLT intelligent fan tray via forced negative-pressure airflow; critical ASICs feature customized heat spreaders linked with real-time temperature sensors, securing an MTBF exceeding 450,000 operating hours.

Q: According to the user manuals, what are the wiring specifications, monitoring signal line connections, and cable selection requirements for the power and energy storage system?

According to the ZXDU68 and ESM engineering documentation: 1. Wiring and Safety Standards: Live-line cable connection and disconnection are strictly prohibited. Personnel must not wear conductive objects such as watches, bracelets, or rings during electrical connection; protective gloves are recommended and insulated tools must be used. Exposed terminals must be fully insulated. Short-circuiting the batteries in any manner is strictly forbidden. Batteries connected in series must share the same brand, model, specifications, and factory batch date. 2. Cable Selection: The cross-sectional area of cables must match the operational load. Cable color selection must comply with local power grid engineering standards; black cables must be selected when non-standard colored cables are used. 3. Monitoring and Grounding: On-site installation requires sequentially connecting monitoring signal cables (referring to commissioning guidelines for alarm dry contact inputs), battery temperature sensors, protective earthing/AC input lines, and working ground/DC output cables.

Question 1

What are the core wire-speed forwarding performance, optical specifications, and power metrics of the Huawei H802EX2 10GE uplink board?

Accepted Answer

The Huawei H802EX2 board provides two standard 10GE optical ports (supporting XFP/SFP+ interfaces depending on hardware revision), fully compliant with IEEE 802.3ae standards, delivering 20Gbps non-blocking bidirectional wire-speed switching. It accommodates 10GBASE-SR (850nm, up to 300m), 10GBASE-LR (1310nm, 10km), 10GBASE-ER (1550nm, 40km), 10GBASE-ZR (80km), as well as CWDM/DWDM optical modules. Powered via the backplane -48V DC bus through high-efficiency onboard DC-DC converters, the board features a static power draw of ~16W and a maximum full-load operating power of < 25W, substantially minimizing heat dissipation and operational OPEX across high-density optical distribution networks.

Question 2

How do the thermal tolerance, surge protection, and heat dissipation design of H802EX2 ensure 99.999% carrier-grade availability in outdoor and rugged sites?

Accepted Answer

Constructed with industrial-grade components, the H802EX2 supports an ultra-wide operating temperature profile of -40°C to +65°C, ensuring reliable cold-boot operations inside outdoor FTTx cabinets (such as Huawei F01D/F01S series). The board integrates surge suppression compliant with ITU-T K.20/K.21 (common-mode 6kV lightning surge protection) and utilizes high-reliability multi-layer ENIG PCB with protective conformal coating operating at 5%-95% non-condensing relative humidity. Cooling is managed by the OLT intelligent fan tray via forced negative-pressure airflow; critical ASICs feature customized heat spreaders linked with real-time temperature sensors, securing an MTBF exceeding 450,000 operating hours.

Question 3

According to the user manuals, what are the wiring specifications, monitoring signal line connections, and cable selection requirements for the power and energy storage system?

Accepted Answer

According to the ZXDU68 and ESM engineering documentation:
1. Wiring and Safety Standards: Live-line cable connection and disconnection are strictly prohibited. Personnel must not wear conductive objects such as watches, bracelets, or rings during electrical connection; protective gloves are recommended and insulated tools must be used. Exposed terminals must be fully insulated. Short-circuiting the batteries in any manner is strictly forbidden. Batteries connected in series must share the same brand, model, specifications, and factory batch date.
2. Cable Selection: The cross-sectional area of cables must match the operational load. Cable color selection must comply with local power grid engineering standards; black cables must be selected when non-standard colored cables are used.
3. Monitoring and Grounding: On-site installation requires sequentially connecting monitoring signal cables (referring to commissioning guidelines for alarm dry contact inputs), battery temperature sensors, protective earthing/AC input lines, and working ground/DC output cables.

Key specifications	Value
Board Type	Dual-port 10GE uplink interface board
Port Density & Specs	2 10GE XFP/SFP+ 10-gigabit fiber-optic slots
Supported Chassis	Huawei SmartAX MA5680T / MA5683T / MA5608T
Subscriber Capacity	Provides 20Gbps non-blocking 10GE uplink bandwidth
Typical Power Consumption	< 25 W
Operating Temperature	-40°C to +65°C

Huawei H802EX2 2-Port 10GE Uplink Interface Board (For SmartAX MA5680T/MA5683T)

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Metropolitan FTTH aggregation 10G upstream upgrades

Enterprise optical campus 10G backbone routing

Regional telecom central office distribution

Frequently asked questions

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