400G QSFP-DD DR4 2km MPO Optical Transceiver‌ The ‌400G QSFP-DD DR4 2km‌ transceiver is a high-performance optical module designed for long-distance 400 Gigabit Ethernet applications. It leverages ‌PAM4 modulation‌ and ‌1310nm EML lasers‌ to achieve ‌2km transmission‌ over single-mode fiber (SMF), complying with ‌IEEE 802.3bs‌ and ‌QSFP-DD MSA‌ standards. Featuring ‌MPO-12 APC connectors‌, it supports ‌4×100G channels‌ with a ‌9.5W max power‌ consumption, ensuring energy-efficient operation in data center interconnects and metro networks. Applications:‌ Data center interconnects‌ between remote sites. 5G fronthaul/midhaul‌ networks requiring high-bandwidth, low-latency links. Enterprise and cloud service provider‌ infrastructures scaling to 400G. RoHS compliant‌ and engineered for future-proof networking, this transceiver enables seamless migration to next-generation 400G architectures. Compliantwith IEEE802.3bsstandard: 400GAUI-8 electrical interface  Compliantwith IEEE802.3custandards: 4x100GBASE-FR1 optical interface Compliantwith QSFP-DD MSA HW Rev5.1 Type2 housing with MPO-12 connector Compliantwith QSFP-DD CMIS Rev4.0  Maximum power consumption 10W  Case  operating temperature 0°C to 70°C  Two wire serial Interface with digital diagnostic monitoring Complies with EU Directive 2011/65/EU (RoHScompliant) Class1Laser 200G QSFP56 SR4 100M 400G QSFP-DD SR8 100M 400G QSFP-DD DR4 2KM 400G QSFP-DD LR4 10KM 400G OSFP SR8 100M 200G 400G 400G 400G 400G 100M 100M 2KM 10KM 100M 850nm 850nm 1310nm CWDM 850nm MPO MPO MPO LC MPO MM MM SM SM MM DDM DDM DDM DDM DDM COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C FAQ: Q1: What is 400G QSFP-DD? A1: It is a high-density, hot-pluggable optical module interface supporting 400Gbps data rates, featuring 8 electrical channels for enhanced bandwidth. Q2: What are the main types of 400G QSFP-DD modules? A2: Common variants include SR8 (short-range), DR4/FR4 (intermediate), LR4/LR8 (long-range), and ER4/ER8 (extended-reach), with transmission distances ranging from 100m to 40km. Q3: How does OSFP differ from QSFP-DD?‌ A3: OSFP has a larger form factor and non-compatible electrical interfaces, while QSFP-DD is backward-compatible with QSFP28 modules. Q4:What encoding scheme does 400G OSFP use?‌ A4: Data Rate 53.125Gbps (PAM4) per channel(Maximum power consumption 12W), balancing speed and complexity. Q5: What is the maximum transmission distance for 400G QSFP-DD LR4? A5: The LR4 variant supports up to 10km over single-mode fiber (SMF) using 4x106Gbps lanes, ideal for 5G and cloud interconnects.  (https://www.etulinktechnology.com/400g-qsfp-dd-lr4-10km-lc-optical-transceiver_p330.html) Q6: What is the electrical interface of QSFP-DD? A6: The module converts 8 channels of 50Gb/s (PAM4) electrical input data to 4 channels of CWDM optical signals and multiplexes them into a single channel for 400Gb/s optical transmission. Q7: Does QSFP-DD support digital diagnostics? A7: Yes, it includes DDM (Digital Diagnostic Monitoring) per MSA standards, enabling real-time monitoring of temperature, voltage, and optical power. Q8: What DAC options exist for 400G QSFP-DD? A8: Available configurations include direct QSFP-DD-to-QSFP-DD, or breakout to 2x200G QSFP56/4x100G QSFP56/8x50G SFP56 for flexible scaling. Q9: How does OSFP differ from QSFP-DD?‌ A9: OSFP has a larger form factor and non-compatible electrical interfaces, while QSFP-DD is backward-compatible with QSFP28 modules.

Product Overview The ‌100G QSFP28 ER1 Single Lambda 40KM LC Optical Transceiver‌ is a high-performance, hot-pluggable module designed for long-haul data transmission. Leveraging advanced single-wavelength technology and LC duplex connectors, it delivers 100G Ethernet connectivity over distances up to 40 kilometers with low power consumption (<4W). Compliant with IEEE 802.3ba and QSFP28 MSA standards, this transceiver supports duplex single-mode fiber (SMF) and features digital diagnostics monitoring (DDM) for real-time performance tracking. Ideal for data centers, metro networks, and telecom applications, it ensures reliable, high-speed connectivity with superior signal integrity. Key Features Lane signaling rate 106.25Gb/s with PAM4 Up to 40km transmission on SMF EML Laser and APD receiver 4x25.78Gb/s with NRZ electrical interface (CAU1-4) Support KP4 FEC inside the module High speed l/0 electrical interface l2C interface with integrated Digital Diagnostic monitoring QSFP28 MSA package with duplex LC connector Single +3.3V power supply Power consumption <4W Operating case temperature: 0 to +70 °C Compliant to 802.3cu,SFF-8636&SFF-8679 standar Compliant to 100G Lambda MSA100G-ER1 Optical Specifications Complies with EU Directive 2015/863/EU 100G DR1 500M 100G FR1 2KM 100G LR1 10KM 100G ER1 30KM 100G ER1 40KM 100G 100G 100G 100G 100G 1311nm 1311nm 1311nm 1311nm 1311nm 500M 2KM 10KM 30KM 40KM LC LC LC LC LC SM SM SM SM SM DDM DDM DDM DDM DDM COM: 0°C ~70°C COM: 0°C ~70°C COM: 0°C ~70°C IND: -30°C ~85°C COM: 0°C ~70°C COM: 0°C ~70°C FAQ: Q1: What are the key applications of 100G QSFP28?‌ A1: Our 100G QSFP28 modules are widely used in data centers, high-performance computing (HPC), and telecom networks for high-speed interconnects. Q2: What types of 100G QSFP28 does ETU-Link offer?‌ A2: We provide SR4, LR4, ER4, ZR4, and CWDM4 variants, supporting multi-mode and single-mode fiber connections to 100m-100km. Q3: Are ETU-Link 100G QSFP28 modules compatible with major brands?‌ A3: Yes, our 100G QSFP28 transceivers are fully MSA-compliant and interoperable with Cisco, Juniper, Arista, and other OEM switches. Q4: Does you provide customization for 100G QSFP28?‌ A4: Yes, we offer OEM/ODM services including custom labeling, firmware, and compatibility testing. Q5: How does 100G QSFP28 BiDi reduce fiber costs?‌ A5: BiDi modules enable bidirectional 100G transmission over a single fiber strand, doubling fiber utilization compared to conventional dual-fiber solutions. Q6: What fiber connectors are used in 100G QSFP28?‌ A6: MPO-12 for SR4/PSM4, LC duplex for LR4/CWDM4, and LC simplex for BiDi models. Q7: What is the warranty period for 100G QSFP28?‌ A7: Standard 3-year warranty with lifetime technical support. ETU-Link 100G QSFP28 solves key points‌ Problem: Fiber congestion? BiDi models halve your fiber count Problem: Compatibility fears? We guarantee MSA compliance + OEM testing