Huawei QSFP-40G-eSR4 (Part Number: 02310RMB)

The Huawei QSFP-40G-eSR4 is a high-performance optical module engineered for 40 Gigabit Ethernet applications, compliant with the QSFP+ Multi-Source Agreement (MSA). It is specifically designed for short-reach, high-bandwidth connections within data centers, enterprise networks, and campus backbones.

Key Technical Features

• Data Rate and Channels: The module aggregates a total data rate of 40 Gbps, achieved by operating four independent full-duplex channels, each transmitting and receiving at $\approx 10.3125$ Gbps.

• Media and Connector: It operates over Multi-Mode Fiber (MMF) and utilizes a 12-fiber MPO/MTP connector (Type B, female connector) for parallel optics signaling.

• Reach: Maximum transmission distance is typically 300 meters over laser-optimized OM3 MMF, or up to 400 meters over OM4 MMF.

• Optics: It employs an 850 nm VCSEL (Vertical Cavity Surface Emitting Laser) array for the transmitter and a corresponding PIN photodiode array for the receiver.

• Breakout Capability: A primary application is the 40G-to-4x10G breakout, where the QSFP+ port can be connected to four separate 10G SFP+ transceivers using a fan-out MPO-to-4xLC breakout cable, enabling high port density.

• Digital Diagnostics Monitoring (DDM): The module supports DDM/DOM functionality via a 2-wire serial interface for real-time monitoring of operating conditions, including temperature and optical power levels, facilitating network maintenance.

• Power and Temperature: It features low power consumption, typically $\le 1.5$ W, and is rated for a commercial case temperature range of $0^\circ\text{C}$ to $70^\circ\text{C}$.

Application Standards

The module is compatible with the 40GBASE-eSR4 and 40GBASE-SR4 standards, making it the ideal solution for high-density, short-distance inter-rack and end-of-row (EoR) connectivity in modern data center environments.