740-061408 QSFP-28 Juniper Networks Transceiver Module

Juniper Networks 740-061408 QSFP-28 Transceiver Module

The Juniper Networks 740-061408 QSFP-28 100G-CWDM4 Transceiver Module is a high-speed optical solution engineered for reliable data transmission, efficient connectivity, and enterprise-grade networking. Designed for modern infrastructures, it delivers superior performance with advanced monitoring capabilities.

General Details

• Manufacturer: Juniper Networks
• Part Number: 740-061408
• Category: Optical Transceiver

Technical Information

Performance Specifications

• Speed: 100 Gigabit Ethernet
• Breakout Capability: No
• Transceiver Type: QSFP28
• Connector: Duplex LC

Monitoring & Diagnostics

• Monitoring Available: Yes
• Digital Optical Monitoring: Supported
• Diagnostic Support: Enabled

Standards Compliance

• Protocol: 100GBASE-CWDM4 MSA
• Compliance: SFF standards (e.g., SFF-8665)

Signaling & Wavelengths

• Signaling Rate (per lane): 25.78125 ± 100 ppm
• Transmitter Wavelength Ranges:
• 1264.5 nm – 1277.5 nm
• 1284.5 nm – 1297.5 nm
• 1304.5 nm – 1317.5 nm
• 1324.5 nm – 1337.5 nm

Optical Power Levels

• Transmitter Output Power (Min): –6.5 dBm
• Transmitter Output Power (Max): 2.5 dBm
• Receiver Input Power (Min): –11.5 dBm
• Receiver Input Power (Max): 2.5 dBm

Cabling & Distance

• Cable Type: Single-Mode Fiber (SMF)
• Core/Cladding Size: 9/125 μm
• Fiber Grade: SMF
• Transmission Distance: Up to 2 km

Power & Temperature

• Maximum Power Consumption: 3.5 W
• Operating Temperature Range: 0°C to 70°C
• Storage Temperature Range: –40°C to 85°C

High-Speed Optical Networking 100G Transceiver Overview

The Juniper Networks 740-061408 QSFP-28 100G-CWDM4 Transceiver Module belongs to an advanced category of high-speed optical networking components designed to support modern data center, service provider, and enterprise backbone infrastructures. This category focuses on delivering reliable, high-bandwidth optical connectivity that enables seamless data transmission across short to medium distances while maintaining signal integrity, scalability, and operational efficiency. As network traffic continues to grow exponentially due to cloud computing, streaming services, artificial intelligence workloads, and distributed applications, 100G optical transceivers have become a foundational element of next-generation network architectures.

QSFP-28 transceiver modules are engineered to support 100 Gigabit Ethernet connectivity within a compact, hot-pluggable form factor. This category addresses the need for high port density, reduced power consumption, and simplified cabling architectures. CWDM4-based transceivers, such as this Juniper Networks module, further refine the category by utilizing coarse wavelength division multiplexing to transmit multiple optical signals over a single pair of single-mode fiber, optimizing fiber utilization and reducing infrastructure costs.

QSFP-28 Transceiver Technology Evolution

The QSFP-28 form factor represents a significant evolution in optical transceiver design, enabling four high-speed electrical lanes to be aggregated into a single optical interface. This category emerged as networks transitioned from 40G to 100G Ethernet, requiring higher throughput without proportional increases in physical space or power draw. QSFP-28 transceivers support data rates of up to 28 Gbps per lane, achieving a combined throughput of 100 Gbps while maintaining compatibility with existing high-speed networking platforms.

Within this category, CWDM4 transceivers stand out for their ability to transmit four distinct wavelengths over single-mode fiber. This approach contrasts with parallel optics solutions that require multiple fiber pairs, making CWDM4 an efficient choice for data centers seeking to maximize fiber plant utilization. The Juniper Networks 740-061408 module exemplifies this design philosophy by delivering high-performance optical transmission in a streamlined and interoperable package.

Coarse Wavelength Division Multiplexing Fundamentals

CWDM technology enables multiple optical signals to coexist on a single fiber by assigning each signal a distinct wavelength. In the context of 100G-CWDM4 transceivers, four wavelengths are combined to achieve the total data rate. This category benefits from reduced cabling complexity and lower deployment costs compared to parallel fiber solutions, particularly in environments where fiber resources are limited or expensive.

CWDM4 transceivers typically operate over distances of up to two kilometers on single-mode fiber, making them ideal for data center interconnects, campus networks, and metro-access applications. The controlled wavelength spacing and precise optical components used in this category ensure consistent performance, low crosstalk, and reliable signal transmission across the supported distance range.

Optical Performance Characteristics and Signal Integrity

The optical transceiver category defined by QSFP-28 100G-CWDM4 modules prioritizes signal integrity, low latency, and high reliability. These transceivers are engineered to meet stringent optical power budgets and sensitivity requirements, ensuring stable communication even in challenging network environments. The Juniper Networks 740-061408 module is designed to align with industry standards for 100G Ethernet, providing predictable performance across compliant networking equipment.

High-quality laser sources, precision optical filters, and advanced modulation techniques are integral to this category. These components work together to maintain consistent signal quality across varying temperatures, fiber lengths, and network loads. As a result, QSFP-28 CWDM4 transceivers are well-suited for mission-critical applications where downtime or data loss is unacceptable.

Data Throughput and Latency Optimization

100G transceivers play a critical role in minimizing network bottlenecks by delivering high aggregate bandwidth within a single port. This category enables network architects to design flatter network topologies, reducing the number of hops between endpoints and lowering overall latency. For latency-sensitive applications such as real-time analytics, financial trading systems, and distributed databases, this performance advantage is particularly valuable.

QSFP-28 transceivers support advanced forward error correction and signal conditioning features that enhance data integrity without introducing significant latency overhead. These capabilities ensure that high-speed data streams remain accurate and synchronized, even under peak traffic conditions.

Thermal Stability and Environmental Tolerance

Thermal performance is a defining characteristic of enterprise-grade optical transceivers. The QSFP-28 100G-CWDM4 category is designed to operate reliably within a specified temperature range, supporting deployment in dense data center racks and outdoor-accessible network environments. Advanced thermal management techniques, including optimized heat dissipation and temperature monitoring, help maintain consistent optical output and prevent performance degradation.

Environmental tolerance extends beyond temperature to include resistance to electromagnetic interference and mechanical stress. These attributes contribute to long-term operational stability, making the category suitable for continuous operation in demanding network infrastructures.

Compatibility and Interoperability Across Network Platforms

One of the defining advantages of the QSFP-28 100G-CWDM4 transceiver category is its emphasis on interoperability. These modules are designed to integrate seamlessly with a wide range of networking equipment, including switches, routers, and aggregation platforms. The Juniper Networks 740-061408 transceiver is specifically optimized for Juniper hardware ecosystems, ensuring full compatibility, feature support, and firmware alignment.

Standards compliance is central to this category, as adherence to IEEE and MSA specifications ensures predictable behavior across compliant devices. This standardization simplifies network design, reduces integration risk, and enables multi-vendor interoperability where supported.

Hot-Pluggable Design and Operational Flexibility

QSFP-28 transceivers are hot-pluggable, allowing network operators to install, replace, or upgrade modules without powering down equipment. This capability is essential for maintaining uptime in enterprise and service provider networks. The category supports rapid maintenance and scalability, enabling organizations to adapt their network infrastructure as bandwidth demands evolve.

Hot-pluggable design also facilitates inventory management and reduces mean time to repair. Network administrators can quickly swap transceivers to resolve issues or deploy new links, minimizing service disruption.

Single-Mode Fiber Infrastructure Integration

The QSFP-28 100G-CWDM4 category is optimized for single-mode fiber deployments, which are commonly used for longer-distance and higher-bandwidth applications. Single-mode fiber offers lower attenuation and higher capacity compared to multimode alternatives, making it a preferred choice for modern data center and metro networks.

By leveraging CWDM technology over single-mode fiber, this category enables efficient use of existing fiber infrastructure. Organizations can upgrade network speeds without extensive re-cabling, preserving capital investment and accelerating deployment timelines.

Data Centers and Service Provider Networks

The application scope of the QSFP-28 100G-CWDM4 transceiver category spans a wide range of network environments. In hyperscale and enterprise data centers, these transceivers are used to interconnect leaf and spine switches, supporting high-throughput east-west traffic. The ability to deliver 100G connectivity within a compact footprint aligns with the high-density requirements of modern data center designs.

Service provider networks leverage this category to support aggregation and access layers, enabling efficient transport of large volumes of data between network segments. The combination of high bandwidth and moderate reach makes CWDM4 transceivers suitable for metro-access and regional network deployments.

Cloud Computing

 on high-speed optical connectivity to support virtualized workloads, distributed storage, and scalable application platforms. The QSFP-28 100G-CWDM4 category provides the bandwidth and reliability necessary to maintain consistent performance across dynamic cloud environments. Low latency and high throughput ensure that virtual machines and containers can communicate efficiently, supporting seamless workload migration and resource scaling.

In private cloud and hybrid cloud deployments, these transceivers enable secure and high-capacity links between data centers and edge locations. This connectivity is essential for supporting disaster recovery, data replication, and centralized management strategies.

Enterprise Backbone and Campus Networks

Large enterprise networks utilize 100G optical transceivers to build robust backbone infrastructures that connect core switches, aggregation layers, and remote facilities. The QSFP-28 100G-CWDM4 category supports these use cases by providing reliable connectivity over distances suitable for campus and metropolitan environments.

As enterprises adopt bandwidth-intensive applications such as video collaboration, big data analytics, and real-time monitoring, the need for high-capacity backbone links continues to grow. This category addresses those requirements while maintaining operational simplicity and scalability.