Membandingkan CWDM4 dan LR4 QSFP28 100G untuk Implementasi Serat Mode Tunggal

How to choose between QSFP28 100G CWDM4 and LR4 modules for your data center? These two dominant transceiver optik 100G standards look similar but have critical differences impacting cost, reach, and infrastructure. This guide cuts through the complexity, empowering you to make the perfect, pilihan hemat biaya for your high-speed links.

➤ Poin-Poin Utama

Pilih 100G CWDM4 modules for short or medium distances hingga 2 km. These modules help you save money and use less power. They still give good performance.
pilih 100G LR4 modules for long distances hingga 10 km. These modules give strong and reliable signals. You need to spend more for them.
Check if your network equipment works with the modules before you buy. Make sure the modules fit your switches and routers.
Think about how far your network needs to go and your budget. Pick the module that matches your needs now and in the future.
Know that CWDM4 uses direct modulation lasers and needs error correction. LR4 uses external modulation lasers for longer reach and may not always need error correction.

➤ Understanding the Core Technologies

Kedua QSFP28 CWDM4 and QSFP28 LR4 are hot-pluggable, 100GBase transceivers using four 25Gbps lanes. Their core divergence lies in multiplikasi panjang gelombang
and anggaran tautan:

QSFP28 100G CWDM4 Transceiver (100GBase-CWDM4):
- Panjang gelombang: Uses four wavelengths within the Multiplexing Pembagian Panjang Gelombang Kasar (CWDM) grid: approximately 1271nm, 1291nm, 1311nm, and 1331nm.
- Jangkauan: Dioptimalkan untuk up to 2 km over standard serat mode tunggal (SMF).
- Keunggulan Utama:
  Efektivitas Biaya. Leverages wider channel spacing, allowing simpler (cheaper) lasers and optics. Crucial for pusat data berkepadatan tinggi deployments where konsumsi daya and optic module price sangat penting.
- Fiber Usage: Penggunaan dual single-mode fiber (SMF) strands (one for Tx, one for Rx) – a pair of fibers.
QSFP28 100G LR4 Transceiver (100GBase-LR4):
- Panjang gelombang: Uses four tightly packed wavelengths around the 1310nm window (1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm) based on LAN-WDM .
- Jangkauan: Designed for longer distances, supporting hingga 10 km over standard serat mode tunggal (SMF).
- Key Advantage: Reach. Essential for connecting jaringan kampus, metro Ethernet, or linking disaggregated data center buildings.
- Fiber Usage: Also uses dual single-mode fiber (SMF) strands (one for Tx, one for Rx).

➤ Head-to-Head Comparison: CWDM4 vs LR4

Here’s a clear breakdown of the critical differences:

Fitur	QSFP28 100G CWDM4	QSFP28 100G LR4
Standar	100GBase-CWDM4 (IEEE) / MSA	100GBase-LR4 (IEEE 802.3bm Clause 88)
Wavelength Grid	CWDM (~1271, 1291, 1311, 1331 nm)	LAN-WDM (~1295, 1300, 1304, 1309 nm)
Jangkauan Maksimum	2 km	10 km
Jenis Serat	Serat Mode Tunggal (SMF)	Serat Mode Tunggal (SMF)
Jumlah Serat	2 Serat (1 Tx pair, 1 Rx pair) ✅	2 Serat (1 Tx pair, 1 Rx pair)
Biaya Umum	Lower (Simpler lasers & optics) 💰	Lebih tinggi (Tighter tolerances & reach)
Konsumsi Daya	Umumnya Lower (< 3.5W) 🔋	Umumnya Sedikit Lebih Tinggi (≤ 3.5W)
Kasus Penggunaan Utama	Short-Reach Data Center Interconnects (DCI), Top-of-Rack (ToR) to Leaf	Longer-Reach DCI, Metro, Campus Links, Leaf to Spine/Core
Kepatuhan MSA	CWDM4 MSA	IEEE 802.3bm
Interoperabilitas	Not directly interoperable with LR4 ❌	Not directly interoperable with CWDM4 ❌
Pendorong Utama	Cost Optimization, Power Efficiency	Reach Requirement

➤ Why the Reach Difference Matters (And When Cost Wins)

The 2km reach of CWDM4 transceiver is often perfect within modern pusat data berskala sangat besar (hyperscale). If your links connect racks within a row or adjacent rows in the same hall, CWDM4 delivers significant savings nyala optic module cost without sacrificing performance. This makes it the go-to choice for high-volume data center deployments prioritizing total cost of ownership (TCO). LINK-PP’s LQ-CW100-FR4C is a market leader here, offering reliability at an optimal price point.

The 10km reach of LR4 module is indispensable when connecting across buildings, to a central office, or within a metro network. While the optic module price is higher due to more precise laser requirements, it eliminates the need for potentially expensive reach extenders or additional network hops for these longer distances. For robust, future-proofed long distance fiber optic transmission, LINK-PP’s LQ-LW100-LR4C provides the necessary performance.

✅ Key Takeaways & Which One to Choose

Need ≤ 2km within a data center? Choose CWDM4. It’s the hemat biaya, power-efficient workhorse for infrastruktur cloud, webscale networking, and enterprise data center spine-leaf architectures. Maximize your budget without compromise.
Need up to 10km (campus, metro, inter-building)? Choose LR4. Its longer reach is non-negotiable for these scenarios, justifying the higher optic module price. Esensial untuk telecom applications and extended data center interconnects.
Interoperabilitas: CWDM4 and LR4 modules are NOT plug-and-play compatible. Ensure both ends of a link use the BER yang sama technology (CWDM4-CWDM4 or LR4-LR4).
Infrastruktur Serat: Both require standard single-mode fiber patch cables. The choice doesn’t impact your underlying fiber plant type, only the reach it enables.

➤ LINK-PP: Your Partner for High-Performance 100G Optics

Whether you need the cost-optimized efficiency dari CWDM4 for massive data center scaling or the jangkauan diperpanjang dari LR4 for metro connectivity, LINK-PP delivers reliable, high-quality QSFP28 solutions. Our 100G CWDM4 and Alternatif 100G LR4 modules are rigorously tested for seamless 100g qsfp28 integration and performance.

Ready to Optimize Your 100G Network? ✉️
Consult with LINK-PP experts today! We’ll help you select the perfect 100g transceiver – whether it’s CWDM4, LR4, or other cutting-edge modul serat optik – ensuring maximum performance, reliability, and value for your specific Koneksi switch ke server atau antar switch di rack atau di kampus. kebutuhan. Get a quote or request samples now ➞

➤ FAQ

What is the main difference between 100G CWDM4 and 100G LR4?

You will find that CWDM4 works best for short to medium distances, up to 2km. LR4 supports longer distances, up to 10km. LR4 uses stronger lasers and costs more.

Do I need special equipment for CWDM4 or LR4 modules?

Most modern switches and routers support CWDM4. LR4 sometimes needs special gear for long distances. Always check your device’s compatibility before you buy.

Why does CWDM4 require FEC?

CWDM4 needs Koreksi Kesalahan Maju (FEC) to fix errors during data transmission. FEC helps keep your data safe and reliable, especially over longer links.

Can I use CWDM4 and LR4 modules together in one network?

You can use both types in the same network if your equipment supports them. Make sure each link uses the right module for its distance and requirements.