Product Overview The ‌40G QSFP+ ZR4 80KM LC Optical Transceiver‌ delivers industry-leading 80km single-mode fiber transmission using EML laser and APD receivers. For carrier-grade 5G transport, metro DCI, and inter-city backbone networks.  PRODUCT FEATURES Support line rates for 41.25 Gb/s; Lane bit rate 10.3125 Gb/s 40GE Up to 80km transmission on single mode fiber LAN WDM EML laser and APD Support Multi-Pin function with IntL/RxLOSL and LPMode/TxDIS High speed I/O electrical interface (CAUI-4) I2C interface with integrated Digital Diagnostic monitoring QSFP+ MSA package with duplex LC connector Single +3.3V power supply Power dissipation: Commercial：< 4.5W; Industrial：< 5.5W Complies with EU Directive 2015/863/EU 40G LR4 10KM 40G LR4 10KM (COB) 40G ER4 40KM 40G eER4 60KM 40G  ZR4 80KM 40G 40G 40G 40G 40G 1271nm, 1291nm, 1311nm, 1331nm 1271nm, 1291nm, 1311nm, 1331nm 1271nm, 1291nm, 1311nm, 1331nm 1296nm, 1300nm, 1305nm, 1309nm 1296nm, 1300nm, 1305nm, 1309nm 10KM 10KM 40KM 60KM 80KM LC LC LC LC LC SM SM SM SM SM DDM DDM DDM DDM DDM COM: 0°C ~70°C IND: -40°C ~85°C COM: 0°C ~70°C COM: 0°C ~70°C IND: -20°C ~85°C COM: 0°C ~70°C IND: -40°C ~85°C COM: 0°C ~70°C IND: -40°C ~85°C FAQ: Q1: What is a 40G QSFP Optical Module?‌ A1: A 40G QSFP (Quad Small Form-factor Pluggable) module is a hot-swappable transceiver that supports 40Gbps data transmission. It uses a 4-channel parallel design and is widely deployed in data centers and high-performance computing networks. Q2: What are the common types of 40G QSFP modules?‌ A2: QSFP+ SR4 (850nm multimode, 100m) QSFP+ LR4 (1310nm single-mode, 10km) QSFP+ ER4 (1310nm single-mode, 40km) QSFP+ BiDi (Single-Fiber Bidirectional) Q3: How do I check if a 40G QSFP module is compatible with my device?‌ A3: Verify three aspects: Switch vendor compatibility lists Matching fiber type (MMF/SMF) Required transmission distance Q4: How to resolve overheating in 40G QSFP modules?‌ A4: Solutions: Ensure adequate device ventilation Use modules with heat dissipation fins Avoid sustained 100% bandwidth utilization Q5: What precautions should I take when installing 40G QSFP modules?‌ A5: Key operational guidelines‌: Clean fiber connectors‌ before insertion to prevent dust from disrupting optical signal transmission. Ensure ‌adequate ventilation‌ around devices; reserve thermal headroom for high-heat modules. Configure ‌port aggregation mode‌ on the switch when using breakout applications. Q6: What's the difference between SFP, QSFP and QSFP-DD modules?‌ A6: SFP (1-25G), QSFP (40-100G), and QSFP-DD (400G+) differ in form factor and bandwidth capacity. QSFP-DD doubles QSFP28's density with 8-lane electrical interfaces. Q7: How does ETU-Link ensure compatibility with major brands?‌ A7: We maintain a multi-vendor test lab with full protocol support (Ethernet/InfiniBand/Fibre Channel) and 100% compatibility verification before shipment Q8: What temperature ranges do your modules support?‌ A8: Commercial grade (0°C to +70°C) Extended grade (-20°C to +85°C) Industrial grade (-40°C to +85°C) for harsh environments. Q9: How does ETU-Link achieve 40G QSFP+ interoperability?‌ A9: Through: Multi-vendor switch testing Firmware customization for legacy equipment MSA-compliant electrical interfaces Q10: Do 40G QSFP+ modules support DDM/DOM monitoring?‌ A10: Standard feature including: Real-time temperature (±1°C accuracy) Tx/Rx power (µW/dBm display) Laser bias current