QSFP-40G-ER4の実態解明：40km先までの40Gbps伝送へのガイド

In the high-stakes world of data centers and service provider networks, bandwidth and reach are everything. As 用に定義された電気インターフェースです。XLAUIは、特にQSFP+などのプラグイン式モジュールにおいて、 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?

この 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 光は長距離通信向けの for distances up to 40 kilometers.

This module uses four lanes of 10Gbps in the transmit and receive directions. It employs 波長分割多重化（WDM） 技術 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:

機能	LINK-PP LPJE101NNL
フォームファクター	QSFP+（クアッド・スモール・フォームファクタ・プラグアブル・プラス）
磁気部品	用に定義された電気インターフェースです。XLAUIは、特にQSFP+などのプラグイン式モジュールにおいて、
波長	4x CWDM (1271, 1291, 1311, 1331nm)
最大伝送距離	最大40km on Single-Mode Fiber (SMF)
光ファイバータイプ	シングルモード（OS2）
コネクタ	デュプレックスLC
消費電力	Typically < 3.5W
デジタル診断モニタリング（DDM）	Yes, for real-time monitoring

主な応用分野：

• データセンター間接続 の分野において画期的な製品です。: 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:

• 前方誤り訂正（FEC）により、従来の規格と比較して、より長い伝送距離とノイズ環境下での優れた性能を実現できます。 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.

• 大きなコスト削減： 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.

例えば、 LINK-PP LQ-CW40-ER4C is a popular choice for network engineers looking for a reliable and コスト効率の高い 40G光トランシーバー 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.

• と. QSFP-40G-SR4: SR4 is for short-range (up to 150m) over multi-mode fiber (MMF). ER4 is for long-range over SMF.

• と. 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, として、 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.