Arista

Arista ADPT-O-Q-100G | 100G adapter | OSFP-to-QSFP28 | 100GBASE (SR4/LR4/PSM4/CWDM4/CR4) | wavelength/reach: per QSFP28 | connector: OSFP host, QSFP28 module

Arista ADPT-O-Q-100G | 100G adapter | OSFP-to-QSFP28 | 100GBASE (SR4/LR4/PSM4/CWDM4/CR4) | wavelength/reach: per QSFP28 | connector: OSFP host, QSFP28 module

SKU:ADPT-O-Q-100G

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Description

High-speed adapter enabling 400G OSFP switch ports to accept 100G QSFP28 optics or DACs. Passive, no retimer, preserving line-rate performance and module management. Ideal for migrating or downspeeding links while leveraging existing QSFP28 optics.

Features

- Enables 100G QSFP28 optics on OSFP 400G ports
- Passive design for zero added latency and simplicity
- Protects existing investment in QSFP28 optics
- Standards-aligned for broad module interoperability
- Ideal for phased 100G-to-400G migrations

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

Technical Specifications

- Host interface: OSFP (accepts in OSFP 400G port)
- Module interface: QSFP28 (100G)
- Max data rate: 100GbE (4x25G NRZ lanes)
- Operation: Passive mechanical/electrical adapter (no retiming)
- Supported module types: 100GBASE-SR4, -LR4, -PSM4, -CWDM4, and CR4 DAC (module-dependent)
- Wavelength & reach: Defined by the installed QSFP28 module
- Connector style: OSFP at host; module-side connectors per optic (MPO-12, LC duplex, or twinax)
- Standards: QSFP28 MSA compliant; IEEE 802.3 100G Ethernet (per installed optic)
- Management: Host reads module via QSFP28 interface through adapter
- Use case: Downspeed OSFP 400G ports to 100G for migration or mixed environments

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