Question 1

What are the core optical parameters, electrical performance, and link budget of the Huawei 1.25G eSFP 10km (eSFP-GE-LX-SM1310)?

Accepted Answer

Compliant with IEEE 802.3z 1000BASE-LX and SFF-8472 specifications, the module operates at a central wavelength of 1310 nm using an uncooled FP transmitter and a high-sensitivity PIN receiver. It features a transmit optical power between -9.0 dBm and -3.0 dBm, receiver sensitivity of ≤ -20.0 dBm, and an optical saturation point of ≥ -3.0 dBm, yielding an optical link budget of ≥ 11.0 dB to support 10 km reach over standard 9/125 μm single-mode fiber (SMF). Operating on a standard 3.3V ±5% rail with typical power consumption under 0.8 W, it integrates full Digital Diagnostics Monitoring (DDM/DOM) for real-time telemetry of internal voltage, Tx bias current, Tx/Rx optical power, and operating temperature.

Question 2

How does the module perform in terms of chassis compatibility and mixed slot deployment across Huawei platforms?

Accepted Answer

Flashed with genuine Huawei firmware microcode (Part Number: 02315200 / eSFP-GE-LX-SM1310), this module offers native plug-and-play compatibility across Huawei CloudEngine switches, S-series campus switches (e.g., S5700/S6700/S7700), NetEngine routers (NE40E/NE8000), and OptiX OSN/PTN platforms. Conforming strictly to the SFP Multi-Source Agreement (INF-8074i), it supports hot-swapping and can coexist seamlessly in the same line card with GE-SX multimode, GE-ZX, or copper SFP-T modules. It operates reliably in rate-negotiable or fixed 1.25 Gbps ports without bus contention, false alarms, or system log errors.

Question 3

How is the module engineered to withstand harsh temperature and electromagnetic conditions in outdoor telecom sites and industrial edge nodes?

Accepted Answer

Designed as an enhanced small form-factor pluggable (eSFP) device, this transceiver supports an industrial-grade operating temperature range of -40°C to +85°C, making it ideal for unconditioned outdoor telecom cabinets, pole-mounted RRU/BBU enclosures, and harsh edge-compute setups. Its die-cast zinc housing provides high-efficiency EMI shielding and ESD protection rated at 4kV contact / 8kV air discharge (IEC 61000-4-2 compliant). Thermal-cycled optoelectronic components eliminate thermal drift under extreme temperature swings, yielding an MTBF exceeding 1,000,000 hours.

Key specifications	Value
Physical Form Factor	eSFP (enhanced SFP)
Data Rate	1.25 Gbps
Central Wavelength	1310 nm
Maximum Distance	10 km
Fiber Type	Single-Mode Fiber (SMF) (SMF)
Optical Connector	Duplex LC Connector
Typical Power Consumption	< 0.8 W
Operating Temperature	-40°C ~ +85°C (industrial wide-temperature grade)
Digital Diagnostic Monitoring	Digital Diagnostic Monitoring Supported

Huawei 1.25G eSFP 1310nm 10km Enhanced Single-Mode Gigabit Optical Transceiver

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Enterprise campus core aggregation uplinks

Metropolitan carrier edge distribution

Industrial video surveillance optical transport

Frequently asked questions

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