JNP-SFP-25G-SR Juniper Networks Transceiver 25GBASE-SR Sfp28 Module For Mmf.

Product Overview for the Juniper JNP-SFP-25G-SR 25G Transceiver for Modern Networks

The Juniper Networks JNP-SFP-25G-SR optical transceiver is engineered to deliver seamless 25 Gigabit Ethernet connectivity across multi-mode fiber (MMF) environments. Designed for enterprise-class and data center deployments, this SFP28 module is ideal for high-speed, short-range data transmission.

Key Technical Capabilities

• Transmission Speed: Capable of sustaining 25GbE throughput for high-bandwidth demands
• Connector Interface: Equipped with a duplex LC connector for secure fiber links
• Transceiver Form Factor: Compact SFP28 design supports plug-and-play functionality
• Breakout Support: Not intended for breakout configurations

Signal and Optical Characteristics

Wavelength and Fiber Compatibility

• Laser Range: Emits and receives wavelengths between 840nm and 860nm
• RMS Spectral Width: Limited to 0.6nm for precise optical transmission
• Fiber Type: Optimized for OM3 and OM4 MMF cabling
• Core/Cladding Ratio: 50/125 micrometers

Transmission Distance

• OM3 Fiber: Supports up to 70 meters
• OM4 Fiber: Reaches up to 100 meters
• Effective Modal Bandwidth: 2000 MHz·km for OM3 and 4700 MHz·km for OM4

Advanced Diagnostic Monitoring

Real-time data monitoring capabilities help maintain system integrity and performance:

• Temperature Readings: Onboard sensor for thermal status
• Voltage Tracking: Tracks power supply levels
• Tx Bias Current: Monitors laser drive current
• Tx Output Power: Ensures sufficient optical signal strength
• Rx Optical Power: Confirms signal reception quality

Electrical and Optical Ratings

Signaling and Performance

• Per Lane Signaling Rate: 25.78125 Gbd ±100 ppm
• Output Power Range (Tx): -8.4 dBm to 2.4 dBm
• Input Power Threshold (Rx): -10.3 dBm to 2.4 dBm
• Stressed Sensitivity (OMA): Rated at -5.2 dBm

Digital Optical Monitoring Compliance

• DOM Capabilities: Fully digital interface for precise monitoring and control
• Standard Compliance: Adheres to MSA SFF-8402 protocols

Thermal and Environmental Specifications

• Operational Temperature: Functional within 0°C to 70°C
• Storage Threshold: Withstands -40°C to 85°C when idle
• Power Draw: Maximum energy consumption limited to 1.5 Watts

Physical Specifications

Compact and Lightweight Design

• Weight: Approximately 0.15 kilograms
• Dimensions:
• Height: 8.55 mm
• Width: 13.55 mm
• Depth: 57.5 mm

Application and Use-Case Scenarios

• Short-range server-to-switch connections in high-speed enterprise networks
• Cost-efficient upgrades for 25GbE switching infrastructure
• Ideal for environments leveraging existing MMF cabling infrastructure
• Supports dense data center architectures with minimal power footprint

Compliance and Interoperability

Multi-Source Agreement Standards

• Conforms to industry-wide specifications for seamless integration
• Commercial-grade build for typical enterprise environments
• Guaranteed interoperability with Juniper Networks systems and platforms

Juniper Networks JNP-SFP-25G-SR SFP28 Module Overview

The Juniper Networks JNP-SFP-25G-SR is a high-performance, hot-pluggable transceiver module specifically designed to support 25 Gigabit Ethernet (25GbE) connectivity over multimode fiber (MMF). Featuring a compact Small Form-factor Pluggable 28 (SFP28) interface, this module is ideal for enterprise and data center environments that require fast, reliable, and scalable network infrastructure. With its 25GBASE-SR capability, the JNP-SFP-25G-SR delivers blazing speeds over short distances, making it well-suited for high-density server connections, top-of-rack (ToR) deployments, and high-throughput switching fabrics.

Key Features and Benefits

• Supports 25GbE data rate over MMF up to 70 meters with OM3 fiber and up to 100 meters with OM4 fiber.
• Hot-swappable SFP28 form factor for seamless integration and easy maintenance.
• Low power consumption and excellent heat dissipation for energy-efficient operation.
• Optimized for high-performance Juniper switches and routers.
• Compatible with a variety of networking equipment via standardized interface specifications.

Application Scenarios for JNP-SFP-25G-SR Modules

The Juniper JNP-SFP-25G-SR is designed for short-reach interconnections within data centers and enterprise networks. It is commonly used in:

Top-of-Rack to Server Connectivity

In high-density data centers, top-of-rack switches connect directly to servers using short-range optical transceivers. The 25GbE speed supported by the JNP-SFP-25G-SR offers a significant performance boost over traditional 10GbE, ensuring faster data movement and lower latency.

Leaf-Spine Architectures

Modern data centers leverage leaf-spine topologies for scalable and predictable network performance. The JNP-SFP-25G-SR plays a crucial role in these designs, connecting leaf switches to spine switches with 25GbE links that reduce oversubscription and enhance throughput.

Enterprise Campus Networks

Although originally designed for data centers, 25GbE SFP28 modules like the JNP-SFP-25G-SR are increasingly being deployed in large enterprise campus environments for aggregation and core networking. Their ability to deliver high bandwidth over short distances makes them ideal for network backbone upgrades.

Technical Specifications

Understanding the detailed technical specifications of the Juniper JNP-SFP-25G-SR can help IT teams make informed purchasing decisions. Below are the critical hardware and performance specs of this module.

Performance Parameters

• Data Rate: 25.78 Gbps
• Distance Support: Up to 70m (OM3 MMF), up to 100m (OM4 MMF)
• Wavelength: 850nm
• Connector: Duplex LC
• Form Factor: SFP28
• Digital Diagnostics Monitoring (DDM): Supported
• Power Consumption: < 1.0W

Environmental and Compliance Details

• Operating Temperature: 0°C to 70°C (commercial grade)
• RoHS Compliant: Yes
• Laser Safety: Class 1 compliant per IEC/EN 60825-1
• EMI: FCC Class A, CE

Compatibility with Juniper and Third-Party Devices

One of the strengths of the JNP-SFP-25G-SR module is its broad compatibility across various Juniper hardware platforms and, in many cases, third-party networking equipment. While it is optimized for Juniper's own infrastructure, adherence to SFP28 MSA standards allows for flexible deployment.

Juniper Switches Supporting JNP-SFP-25G-SR

• QFX5120 Series
• QFX5110 Series
• QFX5200 Series
• EX4650 Series
• MX Series Routers (selected models)

Third-Party Equipment Considerations

Although primarily tested and validated for Juniper equipment, many organizations successfully use this module with third-party devices that support 25GBASE-SR SFP28 optics. However, users must verify DDM support, vendor locking policies, and firmware compatibility.

Vendor Locking and Optics Authentication

Some network equipment vendors implement proprietary optics authentication protocols to ensure only certified transceivers are used. Juniper offers both branded and non-branded variants to suit different budget and support requirements. Compatibility should be tested in non-Juniper environments.

Understanding SFP28 and 25GBASE-SR Technology

To fully appreciate the capabilities of the JNP-SFP-25G-SR, it’s essential to understand the underlying technologies that power this optical transceiver.

What Is SFP28?

SFP28 is the enhanced version of the SFP+ form factor, supporting 25Gbps per lane. It maintains backward compatibility with SFP+ ports while offering greater bandwidth efficiency. With reduced latency and increased port density, SFP28 modules are widely adopted in modern networking applications.

25GBASE-SR Protocol Overview

25GBASE-SR is an IEEE standard (802.3by) for transmitting 25GbE over short distances using MMF and 850nm lasers. It provides a cost-effective, high-performance solution for intra-rack and short-reach inter-rack connectivity. Utilizing advanced encoding and signal processing, 25GBASE-SR maximizes the available fiber infrastructure.

Use Cases and Network Optimization

High-Density Data Center Deployments

In scenarios requiring massive scale and throughput, such as hyperscale cloud providers and enterprise private clouds, the JNP-SFP-25G-SR offers the right blend of speed, form factor, and efficiency to facilitate high-bandwidth communications within densely packed server racks.

Upgrade Path from 10GbE

Many organizations are upgrading from 10GbE to 25GbE to keep pace with increasing data and application demands. The JNP-SFP-25G-SR offers a smooth upgrade path, particularly for infrastructures already using SFP+ cabling and infrastructure, reducing total cost of ownership (TCO).

Cost and Energy Efficiency

Compared to 40GbE or 100GbE solutions, 25GbE using SFP28 optics like the JNP-SFP-25G-SR achieves lower cost per Gbps and reduced power consumption. This makes it a highly efficient option for network architects looking to balance performance with sustainability and budget constraints.

Deployment Considerations

Fiber Type and Quality

The performance of the JNP-SFP-25G-SR is closely tied to the quality and type of fiber used. OM3 and OM4 multimode fibers are recommended for optimal reach and signal integrity. Patch cord cleanliness, fiber bend radius, and connector quality all influence performance.

Distance and Signal Budget

Network engineers must calculate the optical budget and distance requirements based on their deployment environment. For example, while OM4 supports up to 100 meters, attenuation and dispersion must be within thresholds to ensure error-free transmission.

Environmental Factors

Data centers should maintain temperature and humidity within specified operational limits to ensure long-term performance. While the JNP-SFP-25G-SR supports commercial temperature ranges, industrial deployments may require hardened variants.

Compliance, Certifications, and Reliability

The JNP-SFP-25G-SR meets stringent industry standards and passes multiple reliability tests to ensure safe and reliable operation in mission-critical environments.

Certifications and Standards

• Compliant with IEEE 802.3by (25GBASE-SR)
• Compliant with SFF-8402 and SFF-8472
• RoHS-6 compliant
• EMI certified and ESD compliant

MTBF and Reliability Benchmarks

The Mean Time Between Failures (MTBF) for the JNP-SFP-25G-SR is rated in the millions of hours, ensuring excellent reliability. Components undergo rigorous testing, including temperature cycling, vibration, and extended burn-in to simulate long-term usage.

Inventory Management and Deployment Strategies

Organizations managing large-scale deployments often require planning tools and strategies to ensure optimal module availability and usage across their infrastructure.

Spare Management and Redundancy

It’s recommended to stock spare JNP-SFP-25G-SR units to ensure rapid replacement in the event of module failure. Hot-swap capabilities allow for zero-downtime replacement, improving network uptime and service continuity.

Labeling and Asset Tagging

Proper labeling and tagging of optics help with inventory tracking, compliance audits, and lifecycle management. Integration with DCIM (Data Center Infrastructure Management) systems further enhances tracking capabilities.

Future-Proofing with 25GbE Optics

As data volumes continue to grow, adopting scalable optics like the JNP-SFP-25G-SR helps future-proof infrastructure investments. 25GbE is expected to remain a key technology in enterprise and cloud networking for the next several years.

Scalability to 50G and 100G

25GbE serves as the building block for higher-speed links, such as 50G (via 2x25G lanes) and 100G (via 4x25G lanes), making it an excellent foundation for scalable networks.

Vendor Roadmaps and Ecosystem Adoption

With broad industry adoption and strong support from networking vendors, the 25GbE ecosystem continues to mature. This translates into better interoperability, reduced costs, and greater availability of compatible hardware like the JNP-SFP-25G-SR.