Cisco QSFP-200G-SR4-S Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 200GBASE-SR4 QSFP56 Parallel Multi-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-200G-SR4-S
Naming Breakdown
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QSFP56: Quad Small Form-factor Pluggable 56 hot‑swappable transceiver complying with QSFP56 MSA and CMIS Rev4.0 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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SR4: Short Reach 4-lane parallel multi-mode optical standard defined under IEEE 802.3cd 200GBASE-SR4
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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 operating at nominal 850 nm VCSEL wavelength. Parallel optical design uses 4 transmit and 4 receive multi-mode fiber strands via one MTP/MPO‑12 UPC multifiber connector. Equipped with VCSEL transmit array and PIN receiver array.
Breakout Capability: Supports flexible port breakout:4 × 50GBASE-SRor2 × 100GBASE-SR2with matched MPO‑12 to LC fanout cables; native aggregated 200G operation is also supported.
FEC Note: RS-FEC is recommended to achieve full maximum transmission distance.
Core Product Positioning
The Cisco QSFP-200G-SR4-S is a commercial-grade hot‑swappable QSFP56 parallel multi-mode optical transceiver optimized for ultra-short reach 200 Gigabit Ethernet interconnections inside cloud, AI compute and enterprise data centers. It delivers a low-cost, high-density parallel MMF solution for rack-to-rack links, leaf-spine fabric downlinks and GPU/HPC cluster interconnections, supporting multiple breakout modes to maximize port utilization. Integrated digital diagnostics enable continuous real-time monitoring of optical operating parameters to simplify routine 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
Multi-Mode Fiber (MMF) OM3 / OM4 / OM5; incompatible with single-mode fiber.
Connector Type
MTP/MPO‑12 UPC multifiber optical connector
Important: UPC-terminated trunk cables and fanouts are mandatory; APC-type MPO connectors are not supported.
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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Operating Wavelength: 842 nm ~ 862 nm (850 nm nominal VCSEL)
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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: VCSEL array; Receiver: PIN photodiode array
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Operating Modes: Native 200GBASE-SR4, breakout to 4 × 50GBASE-SR or 2 × 100GBASE-SR2
Maximum Transmission Distance
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OM3 MMF: up to70 meters
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OM4 / OM5 MMF: up to100 meters
Optical Power Budget
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Average Transmit Optical Power: −5.4 dBm ~ +0.5 dBm
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Minimum Receiver Sensitivity (OMA): −8.7 dBm
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Maximum Allowable Received Optical Power: +2.0 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-SR4 PAM4 Ethernet; supports flexible breakout to 4 × 50G or 2 × 100G Ethernet; RS-FEC recommended for full reach performance.
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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Short-reach 200GE leaf-spine fabric downlinks within cloud, AI and HPC data center racks
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GPU server cluster and high-performance computing interconnections up to 100 meters
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Flexible density deployment: single QSFP56 port breakout into four independent 50G connections
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Network upgrades leveraging existing MPO‑12 multi-mode trunk cabling infrastructure
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High-density rack aggregation interconnections within same data center pod
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, QSFP56 MSA, CMIS Rev4.0, SFF‑8636
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Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco QSFP-200G-SR4-S QSFP56 Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
MPO‑12 UPC multi-mode trunk cables and MPO‑to‑LC UPC breakout fanouts sold separately.
Model Comparison Reference
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QSFP-200G-SR4-S: MPO‑12 UPC parallel MMF, max 100m (OM4), supports native 200G / 4×50G / 2×100G breakout
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QSFP-200G-SL4-S: MPO‑12 UPC short-limited MMF, maximum 30m reach
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QSFP-200G-DR4-S: MPO‑12 APC parallel single-mode, max 500m, SMF only
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QSFP-200G-FR4-S: Duplex LC CWDM single-mode, max 2km, no breakout capability
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QSFP-100G-SR4-S: QSFP28 100G predecessor parallel multi-mode module
UNSPSC Classification Code
43222618 – Cisco QSFP-200G-SR4-S short-reach parallel multi-mode QSFP56 transceiver with DOM and multi-mode breakout capability, hot-swappable 200 Gigabit optical module for AI, cloud and enterprise data center rack-to-rack and leaf-spine 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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