40G QSFP+ MTP vs 40G QSFP+ LC Transceivers

When deploying 40G networks, two popular types of transceivers come into play: QSFP+ MTP and QSFP+ LC. While both support 40G speeds, they differ in how they transmit data and connect to fiber infrastructure.

Let’s break it down 👇

📦 1. 40G QSFP+ MTP (Parallel Optics)

• Connector: MTP/MPO (12-fiber)

• Transmission: 4x10G lanes over multi-mode fiber (MMF)

• Cable Type: OM3/OM4 MMF

• Typical Reach: Up to 100m (OM3) or 150m (OM4)

• Use Case: High-density, short-distance connections (e.g., spine-leaf in data centers)

• Plug-and-play with MTP trunk cables and cassettes

🔧 2. 40G QSFP+ LC (WDM Technology)

• Connector: LC Duplex

• Transmission: 4x10G multiplexed over single-mode fiber (SMF)

• Cable Type: OS2 SMF

• Typical Reach: Up to 10km

• Use Case: Long-distance 40G links, such as between buildings or across campuses

• Efficient in existing LC-based infrastructure

🆚 QSFP+ MTP vs LC – Key Differences

💡 Which One to Choose?

• ✅ Use MTP when you're building short-range, high-density 40G links inside data centers.

• ✅ Choose LC if you need long-distance transmission over single-mode fiber or have existing LC infrastructure.

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