Cisco QSFP-200G-FR4-S Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 200GBASE-FR4 QSFP56 CWDM Single-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-200G-FR4-S
Naming Breakdown
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QSFP56: Quad Small Form-factor Pluggable 56 hot‑swappable transceiver complying with QSFP56 MSA and CMIS standard
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200G: Aggregate 212.5 Gbps raw bandwidth (4 × 53.125 GBd PAM4 electrical lanes for 200 Gigabit Ethernet payload)
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FR4: Four-channel CWDM medium-reach optical standard defined under IEEE 802.3cd 200GBASE-FR4
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S: Commercial temperature-grade variant (0°C ~ +70°C operating range)
Core Architecture
Four independent 53.125 GBd PAM4 optical lanes using CWDM wavelength grid: 1271 nm, 1291 nm, 1311 nm, 1331 nm. Built-in optical multiplexer and demultiplexer combine four optical signals onto one duplex pair of single-mode fiber. Equipped with uncooled DFB transmitters and PIN receiver arrays.
Mandatory requirement: Host-side KP4 RS-FEC must be enabled for stable full-reach operation.
Critical restriction:No electrical breakout capability. Operates only as native aggregated 200G link.
Core Product Positioning
The Cisco QSFP-200G-FR4-S is a commercial-grade hot‑swappable QSFP56 optical transceiver designed for medium-reach 200 Gigabit Ethernet interconnections. It uses duplex LC single-mode fiber infrastructure, requiring only two fiber strands instead of multi-fiber parallel cabling. It is widely deployed for leaf-spine fabric uplinks, intra-data-center pod interconnections, campus building-to-building links and short-distance data center interconnect (DCI). Integrated digital diagnostics enable continuous real-time monitoring of optical parameters to simplify maintenance and accelerate fault troubleshooting.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Nexus 9000 Series Switches; Catalyst 9000 high-density switches; ASR 1000 Series Routers; UCS servers and other hardware platforms equipped with QSFP56 ports supporting 200 Gigabit Ethernet.
Verify Cisco official transceiver compatibility matrix and minimum required firmware release prior to deployment.
Supported Operating Systems
NX-OS, IOS-XE releases supporting QSFP56 MSA, CMIS Rev4.0 and digital diagnostic interfaces.
Supported Fiber Media
Single‑Mode Fiber (SMF) G.652 (OS2, 9/125μm) only; incompatible with multi-mode fiber.
Connector Type
Duplex LC UPC optical connector
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable QSFP56, compliant with SFF QSFP56 MSA and CMIS Rev4.0
Optical Interface
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CWDM Wavelength Grid: 1271 nm, 1291 nm, 1311 nm, 1331 nm
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Electrical Interface: 200GAUI‑4, 4 × 53.125 GBd PAM4
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Modulation Scheme: PAM4
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Transmitter: Uncooled DFB array; Receiver: PIN photodiode array
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Mandatory Function: Host KP4 RS‑FEC activation
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Operating Mode: Native 200G only; breakout function disabled
Maximum Transmission Distance
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Up to2 kmover standard G.652 OS2 single-mode fiber (RS‑FEC enabled)
Optical Power Budget
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Average Transmit Optical Power: −4.2 dBm ~ +4.7 dBm
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Minimum Receiver Sensitivity (OMA): −10.4 dBm
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Maximum Allowable Received Optical Power: +3.0 dBm
Digital Diagnostics
DOM / DDM (Digital Diagnostic Monitoring) Supported
Monitors internal module temperature, supply voltage, laser bias current, transmit optical power and received optical power via I2C CMIS interface.
Environmental Specifications (Commercial Grade)
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Operating Temperature:0°C ~ +70°C (32°F ~ 158°F)
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Storage Temperature: −40°C ~ +85°C (−40°F ~ 185°F)
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Relative Humidity: 5% – 95%, non‑condensing
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Maximum Operating Altitude: 3,000 meters
Typical Power Consumption
4. Supported Functional Capabilities
Ethernet Transport
Wire-speed full-duplex 200GBASE-FR4 PAM4 Ethernet; requires host KP4 RS-FEC; no electrical breakout capability.
Layer 2 Protocol Support
802.1Q VLAN trunking, IEEE 802.3x pause frame flow control, LACP, STP/RSTP/MSTP, EtherChannel link aggregation
Interface Diagnostics
Link status detection, error statistics, DOM real-time optical telemetry, LOS (Loss of Signal) alarm indication, Tx disable control, local loopback testing
High Availability
Supports hot-plug OIR (Online Insertion and Removal) on compatible platforms; supports link redundancy via port-channels and spanning tree protocols
Operations & Management
NX-OS / IOS-XE command-line interface, SSH, SNMP v2c/v3, Syslog logging
5. Typical Deployment Scenarios
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Medium-reach 200GE leaf-spine fabric uplinks inside cloud, AI and enterprise data center pods
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Intra-data-center point-to-point single-mode fiber connections ranging from 500 meters to 2 km
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Campus inter-building backbone links utilizing existing duplex LC OS2 single-mode fiber infrastructure
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Short-distance data center interconnect (DCI) between nearby data center facilities
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Aggregation layer interconnections between high-density compute racks and core switching tiers
6. Regulatory & Compliance Certifications
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Safety Standards: UL 60950‑1, IEC/EN 60950‑1, CSA C22.2 No.60950‑1
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EMC Compliance: CE Mark, FCC Part 15 Class A, ICES‑003 Class A
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Laser Safety: Class 1 Laser Product conforming to IEC 60825‑1
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Industry Standards: IEEE 802.3cd, IEEE 802.3bs, QSFP56 MSA, CMIS Rev4.0, SFF‑8665
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Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco QSFP-200G-FR4-S QSFP56 Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
Duplex LC single-mode patch cords sold separately. Cannot be electrically split into independent 50G channels.
Model Comparison Reference
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QSFP-200G-FR4-S: Duplex LC CWDM SMF, max 2km, native 200G only, two-fiber duplex design
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QSFP-200G-DR4-S: MPO‑12 APC parallel single-mode, max 500m, supports 4×50G breakout
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QSFP-200G-LR4-S: Duplex LC WDM single-mode, max 10km, long-distance intra-DC links
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QSFP-200G-SR4-S: MPO‑12 multi-mode parallel optics, OM4 MMF only, rack short-reach links
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QSFP-100G-CWDM4-S: 100G predecessor CWDM duplex LC module, maximum 2km reach
UNSPSC Classification Code
43222618 – Cisco QSFP-200G-FR4-S medium-reach CWDM single-mode QSFP56 transceiver with DOM, hot-swappable 200 Gigabit optical module for cloud, AI and enterprise data center leaf-spine, campus and short-distance DCI networking.
Hardware Warranty
Genuine Cisco transceivers are covered under Cisco limited hardware warranty. Warranty terms for refurbished units follow respective reseller agreements.
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