Cisco QSFP-100G-PSM4-S Full Official Product Description
1. Part Number & Naming Definition
Official Full Name
Cisco 100GBASE-PSM4 QSFP28 Parallel Single-Mode Optical Transceiver Module with Digital Diagnostic Monitoring Support
SKU:QSFP-100G-PSM4-S
Naming Breakdown
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QSFP28: Quad Small Form-factor Pluggable 28 hot‑swappable transceiver compliant with SFF‑8665 QSFP28 MSA specification
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100G: Aggregate 103.125 Gbps bandwidth (4 × 25.78125 Gbps NRZ electrical lanes for CAUI-4)
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PSM4: Parallel Single-Mode 4-channel parallel optical standard defined under PSM4 MSA
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S: Commercial temperature grade variant (0°C ~ +70°C operating range)
Core Architecture:
Four independent 25G NRZ optical lanes operating at the same nominal 1310 nm wavelength. Data transmits over 4 transmit and 4 receive single-mode fibers via one MPO‑12 APC multifiber connector.
Critical Requirements: Must useMPO‑12 APC terminated single-mode ribbon cables.
Key Feature: Supports electrical breakout into four independent 25G channels when paired with MPO‑to‑4×LC APC breakout cables. Native 100G operation is also supported.
Core Product Positioning
The Cisco QSFP-100G-PSM4-S is a commercial-grade hot‑swappable QSFP28 parallel single-mode optical transceiver designed for medium-short reach 100 Gigabit Ethernet within large-scale data centers. It delivers a cost-effective parallel single-mode alternative to duplex-LC WDM transceivers, ideal for leaf-spine fabric interconnections and migration deployments requiring flexible 100G or 4×25G topology. Integrated DOM/DDM enables continuous real-time monitoring of optical operating parameters to simplify routine maintenance and accelerate fault diagnostics.
2. Hardware & Software Compatibility
Supported Host Platforms
Cisco Nexus 3000 / 9000 Series Switches; Catalyst 9500 / 9600 Series Switches; ASR 1000 Series Routers, UCS servers and other hardware equipped with QSFP28 ports supporting 100 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 QSFP28 MSA and SFF‑8636 digital diagnostic monitoring functions.
Supported Fiber Media
Single‑Mode Fiber (SMF) G.652 (OS2, 9/125μm) only; incompatible with multi-mode fiber.
Connector Type
MTP/MPO‑12 APC multifiber optical connector
3. Physical & Optical Performance Specifications
Form Factor
Hot‑swappable QSFP28, compliant with SFF‑8665 MSA
Optical Interface
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Nominal Operating Wavelength: 1295 nm ~ 1325 nm (1310 nm nominal)
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Electrical Lane Rate: 4 × 25.78125 Gbps NRZ CAUI-4
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Dual Operation Modes: Native 100G or breakout to 4 × 25GBASE Ethernet
Maximum Transmission Distance
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Up to500 metersover standard G.652 single-mode fiber
Optical Power Budget (per individual lane)
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Average Transmit Optical Power: -9.2 dBm ~ +2.0 dBm
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Minimum Receiver Sensitivity: -12.66 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 receive optical power.
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 native 100GBASE-PSM4 Ethernet; supports flexible electrical breakout to 4 × 25GBASE Ethernet
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-short reach 100GE leaf-spine fabric uplinks inside cloud and enterprise data centers
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Network migration projects: single QSFP28 port breakout into four independent 25G SFP28 connections
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Intra-data-center point-to-point single-mode ribbon fiber interconnections up to 500 meters
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High-density compute pod aggregation links utilizing parallel single-mode fiber infrastructure
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Clos architecture deployments leveraging MPO ribbon cabling to simplify fiber management
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: PSM4 MSA, SFF‑8665, SFF‑8636
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Environmental Regulation: RoHS compliant, WEEE directive compliant
7. Standard Factory Package Contents
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Cisco QSFP-100G-PSM4-S QSFP28 Optical Transceiver
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Hardware Installation Guide
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Safety and Regulatory Documentation
MPO‑12 APC single-mode ribbon cables and MPO‑to‑4×LC APC breakout cables sold separately. PC-type MPO connectors are not supported.
Model Comparison Reference
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QSFP-100G-PSM4-S: MPO‑12 APC SMF parallel optics, 500m, supports native 100G and 4×25G breakout
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QSFP-100G-DR-S: Duplex LC SMF single-lambda PAM4, 500m, no breakout capability
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QSFP-100G-CWDM4-S: Duplex LC SMF four-wave WDM, 2km, no breakout capability
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QSFP-100G-SR4-S: MPO‑12 PC MMF parallel optics, multi-mode fiber only
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QSFP-100G-FR-S: Duplex LC SMF single-lambda PAM4, 2km, no breakout capability
UNSPSC Classification Code
43222618 – Cisco QSFP-100G-PSM4-S parallel single-mode QSFP28 transceiver with DOM and breakout capability, hot-swappable 100 Gigabit optical module for medium-short reach data center 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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