Overview
The SFP28-32G85-SW is a high-performance, cost-effective SFP28 optical transceiver module designed for short-reach 32G Fibre Channel (32GFC) applications within data centers and Storage Area Networks (SANs). As a “SW” (Short Wavelength) module, it utilizes a reliable 850nm VCSEL laser to transmit data up to 100 meters over OM4 multi-mode fiber (MMF). This module is an ideal solution for high-density, high-bandwidth connections such as switch-to-switch links or server-to-storage connections inside a data center. Crucially, it provides multi-rate functionality, ensuring full backward compatibility with 16G and 8G Fibre Channel speeds, which allows for a seamless and flexible upgrade path for existing storage infrastructure.
Key Features
- High-Speed Data Rate: Supports 32G Fibre Channel for maximum SAN performance.
- Multi-Rate Support: Backward compatible with 16GFC and 8GFC data rates for flexible network integration.
- Cost-Effective Short Reach: Designed for distances up to 70m on OM3 MMF and up to 100m on OM4 MMF.
- 850nm VCSEL Technology: Utilizes a high-performance Vertical-Cavity Surface-Emitting Laser for reliable MMF transmission.
- Hot-Pluggable SFP28: Compliant with the SFP28 MSA standard, enabling installation and swapping without powering down equipment.
- Digital Diagnostics Monitoring (DDM): Allows real-time tracking of critical operating parameters like power, temperature, and bias current.
- Energy Efficient: Engineered for low power consumption, reducing operational expenses and cooling requirements.
- Standard Interface: Features a duplex LC connector for easy connection to standard MMF cabling.
Applications
The SFP28-32G85-SW is the go-to transceiver for short-distance, high-bandwidth storage connectivity. Common applications include:
- High-speed Storage Area Networks (SANs)
- Data center intra-rack and inter-rack connections
- 32G/16G/8G Fibre Channel switch-to-switch uplinks
- Host Bus Adapter (HBA) to SAN switch connections
- Connections within virtualized storage environments
Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | SFP28-32G85-SW Compatible |
| Form Factor | SFP28 |
| Data Rate | 28.05 / 14.025 / 8.5 Gbps |
| Wavelength | 850nm |
| Maximum Cable Distance | 100m over OM4 MMF (70m over OM3) |
| Connector | LC Duplex |
| Fiber Type | Multi-Mode Fiber (MMF) |
| Transmitter Type | VCSEL |
| Receiver Type | PIN |
| DDM/DOM Support | Yes |
| Commercial Temperature Range | 0°C to 70°C (32 to 158°F) |
| Power Consumption | < 1W |
| Protocols | MSA Compliant, FC-PI-6 |
Advantages
The primary benefit of the SFP28-32G85-SW is its ability to deliver ultra-high-speed 32G Fibre Channel performance at a fraction of the cost of longer-reach, single-mode solutions. It leverages affordable multi-mode fiber infrastructure that is commonly found within data centers. Every module is rigorously tested for compatibility with leading SAN equipment manufacturers like Brocade, Cisco, Dell/EMC, and others, guaranteeing reliable operation. The inclusion of DDM provides network administrators with vital insights, enabling proactive maintenance and ensuring the highest level of network stability and uptime for mission-critical storage applications.
Product & Technical FAQs
1. What does SW stand for in SFP28-32G85-SW?
SW stands for Short Wavelength. It indicates that the module operates at a shorter wavelength, typically 850nm, and is designed for use with Multi-Mode Fiber (MMF) over shorter distances, such as within a single building or data center.
2. What specific fiber optic cable should I use with this 32G module?
To achieve the maximum distance of 100 meters, you must use at least OM4 Multi-Mode Fiber. For distances up to 70 meters, OM3 MMF is sufficient. The cable must have LC Duplex connectors to interface with the transceiver.
3. What is the difference between a 32G SW and a 32G LW module?
The key difference is the application. A SW (Short Wavelength) module uses 850nm over MMF for short distances (up to 100m). A LW (Long Wavelength) module uses 1310nm over Single-Mode Fiber (SMF) for much longer distances, typically up to 10km.
4. Can I use this 32G Fibre Channel module in a 25G Ethernet SFP28 port?
No. Although they share the same SFP28 physical form factor, 32G Fibre Channel and 25G Ethernet are incompatible protocols. This module must be installed in a switch or device port that explicitly supports 32G Fibre Channel.
5. Is this module backward compatible with 16G and 8G Fibre Channel?
Yes, the SFP28-32G85-SW is a multi-rate module that supports auto-negotiation, making it fully backward compatible with 16GFC and 8GFC speeds. This is a critical feature for phased network upgrades.
6. What is a VCSEL laser?
A VCSEL (Vertical-Cavity Surface-Emitting Laser) is a type of semiconductor laser diode that is highly efficient and cost-effective to manufacture. It is the standard laser type used in short-reach, multi-mode transceivers like this one.
7. Is the SFP28-32G85-SW module hot-swappable?
Yes. The module conforms to the SFP28 Multi-Source Agreement (MSA), which specifies that the device must be hot-swappable. This allows you to insert or remove it from a live system without causing a service interruption.
8. Why use Multi-Mode Fiber for 32G FC instead of Single-Mode?
For short-distance links inside a data center (under 100 meters), the combination of a Multi-Mode Fiber (MMF) cable plant and SW transceivers is significantly more cost-effective than the equivalent Single-Mode Fiber and LW transceiver solution.
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