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Extreme Networks QSFP28
1. Product Overview
Extreme Networks QSFP28 is an Active Optical Cable (AOC) featuring a 40G QSFP+ to 4 duplex LC interfaces design, engineered for Multi-Mode Fiber (MMF) interconnections. Related products in the same lineup (e.g., F10-QSFP-8LC-AOC30M) deliver QSFP+ breakout solutions, which convert a single 40G QSFP+ port into multiple independent 10G duplex LC ports.
2. Technical Specifications
| Item | Specification |
|---|---|
| Aggregate Data Rate | 40Gbps total bandwidth; 10.3125 Gbps per individual channel |
| Interface Form Factor | QSFP+ to 4× Duplex LC |
| Supported Fiber | OM3 Multi-Mode Fiber (MMF) |
| Operating Wavelength | 850nm |
| Max Power Consumption | ＜1.5W, typical power draw at 1.4W |
| Operating Temperature | 0°C ~ 70°C |
| Minimum Bend Radius | 30mm |
| Supported Protocols | 40G-IB-QDR, 20G-IB-DDR, 10G-IB-SDR, 10G/40G Ethernet, Fibre Channel |
3. Product Features
Standard Compliance
Compliant with SFF-8436, SFF-8431, IEEE 802.3ba-2010 (40GBASE-SR4) and QSFP MSA industry specifications.
Hot-Pluggable Construction
QSFP+ modules support hot swapping without system power shutdown, simplifying field installation and routine maintenance.
Low-Power Design
Maximum power consumption capped below 1.5W, delivering superior power efficiency versus conventional Direct Attach Copper (DAC) cables.
Digital Optical Monitoring (DOM)
Built-in DOM capability enables real-time monitoring of in-service optical performance metrics.
Cost-Effective Deployment
Offers a more economical interconnection alternative compared to discrete optical transceivers paired with separate fiber patch cords.
4. Construction & Composition
- End A Connector: 1 × QSFP+ male connector
- End B Connector: 4 × duplex LC connectors (configurable for single-mode or multi-mode LC variants)
- Housing Material: OFNP fire-retardant rated enclosure
- Signal Encoding: 64b/66b coding for 40GbE; 8b/10b coding for 40G InfiniBand applications
- Channel Layout: Four independent bidirectional channels terminated with separate duplex LC ports
5. Application Scenarios
- Data Centers: Fast, convenient intra-rack and adjacent rack cross-connections
- Enterprise Networking: Compatible with ExtremeSwitching, Summit and BlackDiamond series switches
- HPC & Cloud Computing: Optimized for 40G InfiniBand QDR/DDR/SDR deployments
- Fibre Channel Storage Networks: Interconnection for FC-based storage infrastructure
- Server-to-Switch Links: Breakout cabling converting one 40G uplink into four independent 10G downlink connections
6. Installation & Maintenance
Installation Procedures
- ESD Protection: QSFP+ assemblies are electrostatic-sensitive components; wear ESD grounding wrist straps or equivalent grounding gear during all handling operations.
- Remove Dust Caps: Detach protective ESD dust caps from the QSFP+ connector end.
- Module Insertion: Align the QSFP+ cable connector perpendicularly with the port slot and insert smoothly until an audible click confirms positive locking.
- Model Verification: Cross-check part number printed on module label against on-site networking requirements.
- Disconnection (If Required): Unplug attached interface cables first before removing optical QSFP+ transceivers from equipment ports.
Maintenance Guidelines
- Hot swap is permissible with host equipment powered on.
- Modules shall remain sealed inside ESD-shielded packaging until ready for installation and only be unpacked within static-controlled working areas.
General Precautions
- Always follow standardized ESD handling protocols.
- Never bend cable below the specified 30mm minimum bend radius to prevent internal fiber damage.
- Strictly deploy OM3-grade multi-mode fiber to satisfy official performance specifications.
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