In the high-stakes world of data centers and service provider networks, bandwidth and reach are everything. As 40 Gigabit Ethernet (40GbE) becomes the backbone for critical infrastructure, the need to cover longer distances without sacrificing speed is paramount. Enter the QSFP-40G-ER4 transceiver—a key component for bridging gaps and ensuring seamless, high-speed data transmission over impressive distances. Today, we're breaking down everything you need to know about this powerful optical module.
👉🏻 What is a QSFP-40G-ER4 Transceiver?
The QSFP-40G-ER4 (Quad Small Form-factor Pluggable 40G Extended Reach) is a hot-swappable, optical fiber transceiver module. It's designed for long-haul communications, transmitting 40Gbps data rates over single-mode fiber (SMF) for distances up to 40 kilometers.
This module uses four lanes of 10Gbps in the transmit and receive directions. It employs Wavelength Division Multiplexing (WDM) technology to combine these four lanes onto a single fiber strand, maximizing infrastructure efficiency. It's the go-to solution for long-range 40G optical transmission, connecting data centers, enabling metro network access, and facilitating enterprise campus links.
👉🏻 Key Technical Specifications & Applications
Understanding the specs is crucial for compatibility and performance. Here’s a quick overview:
Feature | Specification |
|---|---|
Form Factor | QSFP+ (Quad Small Form-factor Pluggable Plus) |
Data Rate | 40 Gigabit Ethernet (40GbE) |
Wavelength | 4x CWDM (1271, 1291, 1311, 1331nm) |
Max Reach | Up to 40km on Single-Mode Fiber (SMF) |
Fiber Type | Single-Mode (OS2) |
Connector | Duplex LC |
Power Consumption | Typically < 3.5W |
Digital Diagnostic Monitoring (DDM) | Yes, for real-time monitoring |
Primary Applications:
Data Center Interconnect (DCI): Linking two geographically separated data centers over 40km.
Telecom & Metro Networks: Providing high-capacity links for metropolitan area networks (MANs).
Enterprise Backbone Networks: Connecting buildings across a large corporate or university campus.
40G Network Upgrades: Extending the reach of existing 40G switch ports without needing expensive external equipment.
👉🏻 Why Choose a High-Quality QSFP-40G-ER4? The LINK-PP Advantage
Not all transceivers are created equal. Using a cheap, uncertified module can lead to network instability, data errors, and even damage to your expensive switch equipment. This is where investing in quality from a trusted brand like LINK-PP pays for itself.
LINK-PP's optical modules, including their QSFP-40G-ER4 transceiver, are rigorously tested to ensure 100% compatibility with major OEM switches (Cisco, Juniper, Arista, etc.) and full compliance with MSA standards. They offer:
Superior Performance: Stable signal integrity over the full 40km range.
Advanced DDM Features: Real-time monitoring of temperature, voltage, TX bias, and optical power for proactive network management.
Significant Cost Savings: Providing the same performance as branded modules at a fraction of the cost, drastically reducing your networking infrastructure costs.
Reliability and Warranty: Peace of mind with a robust warranty and expert technical support.
For instance, the LINK-PP LQ-CW40-ER4C is a popular choice for network engineers looking for a reliable and cost-effective 40G optical transceiver that doesn't compromise on reach or performance.
QSFP-40G-ER4 vs. Other 40G Modules: A Quick Comparison
How does it stack up against other 40G options? Its superpower is clearly its reach.
vs. QSFP-40G-SR4: SR4 is for short-range (up to 150m) over multi-mode fiber (MMF). ER4 is for long-range over SMF.
vs. QSFP-40G-LR4: LR4 is also for single-mode fiber but has a shorter maximum reach of 10km. The ER4 extends this dramatically to 40km.
👉🏻 Final Thoughts: Is the QSFP-40G-ER4 Right for You?
If your project requires high-speed data transmission over 20km to 40km, the QSFP-40G-ER4 transceiver is an ideal and cost-efficient solution. It eliminates the need for additional signal boosters, simplifying your network design and reducing latency.
When selecting a module, prioritize compatibility, quality, and supplier reputation. Choosing a trusted provider like LINK-PP ensures you get a high-performance, dependable transceiver that keeps your network running smoothly.
Ready to power up your long-range 40G connections? 🔌
➡️ Browse Our 40G Transceiver Collection Now!
📥 Download the detailed spec sheet for the LINK-PP LQ-CW40-ER4C.
👉🏻 FAQ
What does QSFP+ 40G ER4 stand for?
QSFP+ 40G ER4 stands for Quad Small Form-factor Pluggable Plus, 40 Gigabit, Extended Reach 4. You use it to describe a transceiver that supports 40Gbps speeds over long distances.
What type of fiber do you need for QSFP+ 40G ER4?
You need single-mode fiber (SMF) for this transceiver. It works best with duplex LC connectors. Multi-mode fiber does not support the long distances that ER4 offers.
What devices can use QSFP+ 40G ER4 modules?
You can use these modules in switches and routers with QSFP+ ports. Many brands like Cisco, Juniper, and Arista support them. Always check your device’s compatibility list before you buy.
What is the maximum distance for QSFP+ 40G ER4?
You can reach up to 40 kilometers with this module when you use single-mode fiber. This makes it ideal for connecting buildings, campuses, or data centers across a city.
What makes QSFP+ 40G ER4 different from other 40G modules?
QSFP+ 40G ER4 gives you much longer reach than SR4 or LR4 modules. You get up to 40 kilometers, while SR4 and LR4 offer much shorter distances. This makes ER4 best for long-distance links.
