DWDM-SFP10G5979 Cisco 10Gbps mode Fiber 80km SFP+ Transceiver Module

Cisco DWDM-SFP10G5979 Optical Transceiver Module Overview

The Cisco DWDM-SFP10G5979 optical transceiver is a precision-engineered networking component designed for dense wavelength division multiplexing environments. Built for high-capacity data transport, it supports long-distance optical communication with enhanced stability and signal integrity.

Main Specifications

• Manufacturer: Cisco
• Part Number: DWDM-SFP10G5979
• Product Type: SFP+ Optical Transceiver Module

Technical Specification

• Form Factor: SFP+
• Data Rate: 10Gbps
• Connector: Duplex LC
• Wavelength: 1559.79nm

Optical and Electrical Characteristics

• Transmit Power: -1 dBm to 4 dBm
• Receive Sensitivity: -24 dBm
• Optical Budget: 23 dB
• Maximum Reach: 80 km

Physical and Mechanical Attributes

• Hot-swappable SFP+ pluggable design
• Duplex LC optical interface for stable fiber connectivity
• Compact footprint suitable for high-density chassis deployment
• Optimized thermal performance for continuous operation

Key Optical Parameters

• Wavelength: 1559.79nm (DWDM grid compliant)
• Transmission Distance: Up to 80 kilometers
• Optical Budget: 23 dB link margin for stable connectivity

Performance Highlights

• Stable 10Gbps full-duplex data transmission
• Low latency optical signaling for real-time applications
• Reduced packet loss under high network congestion
• Optimized jitter control for synchronized data flow

Typical Compatibility Use Cases

• Carrier Ethernet backbone networks
• Metro optical transport systems
• Data center interconnect (DCI) architectures
• High-capacity enterprise WAN environments

Interoperability Features

• Seamless integration with DWDM channel grids
• Standard SFP+ port compatibility
• Support for LC duplex fiber cabling infrastructure
• Cross-platform deployment flexibility

Reliability Enhancements

• High optical budget supporting long-range links
• Reduced bit error rate (BER) in dense traffic conditions
• Temperature-resilient operation for continuous uptime
• Engineered for 24/7 enterprise-grade deployment

Efficiency Benefits

• Reduced thermal output for better rack cooling
• Lower energy usage per transmitted bit
• Optimized circuitry for sustained performance cycles

Common Deployment Scenarios

• Cloud computing infrastructure interconnects
• High-speed storage replication systems
• Core network backbone expansion
• High-performance computing (HPC) clusters

System-Level Advantages

• High-density wavelength division multiplexing support
• Reliable long-haul fiber communication capability
• Enterprise-grade signal integrity and performance stability
• Optimized for scalable optical network expansion

Cisco DWDM-SFP10G5979 10GBase-DWDM Optical Transceiver

The Cisco DWDM-SFP10G5979 10Gbps 10GBase-DWDM Single-mode Fiber 80km 1559.79nm Duplex LC Connector SFP+ Transceiver Module belongs to a highly specialized category of dense wavelength division multiplexing optical networking components designed for long-reach, high-capacity data transmission. This class of SFP+ optical transceivers is engineered to support 10 Gigabit Ethernet over single-mode fiber infrastructure, leveraging DWDM technology to maximize spectral efficiency across metropolitan and carrier-grade networks. The module is optimized for deployment in environments requiring stable long-distance optical communication, where signal integrity, wavelength precision, and interoperability with Cisco optical systems are critical.

Optical Transport Networks

Within optical transport architectures, DWDM SFP+ modules such as the Cisco DWDM-SFP10G5979 play a crucial role in enabling scalable bandwidth expansion without requiring additional fiber deployment. By assigning distinct wavelengths to each optical channel, DWDM technology allows multiple 10G signals to coexist on a single fiber pair. This transceiver operates at a fixed wavelength of 1559.79nm, aligning with ITU-T grid standards, ensuring seamless integration into wavelength-division multiplexed transport systems used in telecom, ISP backbone networks, and enterprise interconnect solutions.

Principles of DWDM Optical Transmission

Dense Wavelength Division Multiplexing is a sophisticated optical multiplexing technique that increases fiber capacity by transmitting multiple optical carriers simultaneously at different wavelengths. The Cisco DWDM-SFP10G5979 module operates within this framework, enabling a 10Gbps data stream to be carried over a precisely defined wavelength channel. DWDM systems typically operate on tight wavelength spacing, allowing dozens of channels to coexist within the C-band spectrum. This results in efficient utilization of existing fiber infrastructure while maintaining low latency and high throughput.

Wavelength Stability at 1559.79nm

The 1559.79nm wavelength specification places this module within a defined DWDM channel used in long-haul optical systems. This precise wavelength alignment is essential for minimizing inter-channel interference and ensuring optimal signal separation in multiplexed environments. The stability of this wavelength ensures compatibility with optical multiplexers, demultiplexers, and reconfigurable optical add-drop multiplexers (ROADMs), which are widely deployed in carrier-grade optical networks.

DWDM Channel Allocation and Spectral Efficiency

The DWDM channel allocation system is designed to optimize spectral density by spacing channels at standardized intervals. The Cisco DWDM-SFP10G5979 contributes to this architecture by providing a stable optical carrier that can be assigned within a dense wavelength grid. This allows network operators to scale bandwidth incrementally without modifying physical fiber routes, making it a cost-effective solution for expanding backbone capacity.

SFP+ Form Factor and Physical Design

Compact Small Form-Factor Pluggable Plus Design

The SFP+ form factor is a compact, hot-pluggable interface widely adopted in high-speed networking equipment. The Cisco DWDM-SFP10G5979 adheres to this standardized design, enabling seamless integration into compatible Cisco switches, routers, and optical transport equipment. Its compact size allows for high port density in networking hardware, which is essential for modern data centers and telecom aggregation points where space efficiency is a critical design requirement.

Hot-Swappable Operational Capability

One of the key features of SFP+ transceiver modules is their hot-swappable nature, allowing installation or replacement without powering down network equipment. This capability significantly enhances network uptime and reduces maintenance-related disruptions. In carrier environments where continuous service availability is mandatory, the ability to replace optical modules without downtime provides operational resilience.

Duplex LC Connector Interface

The duplex LC connector used in the Cisco DWDM-SFP10G5979 module ensures secure and low-loss fiber coupling. LC connectors are widely recognized for their precision alignment and compact design, making them ideal for high-density optical applications. The duplex configuration supports simultaneous transmission and reception of optical signals, which is essential for full-duplex 10Gbps Ethernet communication over single-mode fiber.

10GBase-DWDM Transmission Performance and Capabilities

High-Speed 10 Gigabit Ethernet Optical Transport

The module supports 10GBase-DWDM transmission standards, enabling data rates of up to 10Gbps over single-mode fiber. This performance level is suitable for backbone aggregation, metropolitan area networks, and inter-data center connectivity. The integration of DWDM technology with 10 Gigabit Ethernet allows for high-capacity transmission without requiring additional fiber deployment, significantly reducing infrastructure costs.

80km Long-Distance Transmission Capability

A defining feature of the Cisco DWDM-SFP10G5979 is its ability to support transmission distances up to 80 kilometers over single-mode fiber. This extended reach makes it suitable for metropolitan networks, regional interconnects, and long-haul enterprise deployments. The optical power budget and receiver sensitivity are carefully engineered to maintain signal integrity across this distance, even in environments with varying fiber conditions.

Signal Integrity and Optical Power Budget Optimization

Maintaining signal integrity over long distances requires precise balancing of optical power levels, dispersion effects, and attenuation factors. This transceiver is designed with optimized optical budget parameters that ensure stable performance across extended fiber spans. The integration of advanced laser technology and receiver sensitivity tuning helps maintain low bit error rates in demanding network environments.

Single-Mode Fiber Compatibility

Optimized for Long-Haul Single-Mode Fiber Networks

The Cisco DWDM-SFP10G5979 is specifically designed for use with single-mode fiber (SMF), which is the preferred medium for long-distance optical communication. Single-mode fiber provides low attenuation and minimal modal dispersion, making it ideal for high-speed DWDM transmission. This compatibility ensures that the module can be deployed in both existing fiber infrastructure and newly constructed optical networks.

Fiber Dispersion and Signal Management

Chromatic dispersion is a key challenge in long-distance optical communication, particularly at high data rates such as 10Gbps. The module’s design accounts for dispersion effects by maintaining precise wavelength control and signal modulation stability. In engineered networks, dispersion compensation techniques may be used alongside the transceiver to ensure optimal signal clarity over extended distances.

Network Scalability Through Fiber Reuse

DWDM technology enables network operators to maximize the utility of existing fiber infrastructure by allowing multiple wavelength channels to coexist. The Cisco DWDM-SFP10G5979 contributes to this scalability by providing a dedicated optical channel that can be integrated into a larger multiplexed system. This reduces the need for new fiber installation and supports incremental network expansion strategies.

Cisco Ecosystem Compatibility and Network Integration

Seamless Integration with Cisco Networking Equipment

The Cisco DWDM-SFP10G5979 module is engineered for compatibility with a wide range of Cisco networking platforms, including switches, routers, and optical transport systems. This ensures consistent performance, reliable detection, and full interoperability within Cisco-managed network environments. The module is designed to meet Cisco’s stringent quality and performance standards for enterprise and carrier-grade deployments.

Firmware and System-Level Compatibility

Cisco optical modules are typically validated for firmware and system compatibility within Cisco hardware ecosystems. This ensures that the DWDM-SFP10G5979 operates reliably under supported configurations, maintaining consistent performance across diverse network topologies.

Deployment Scenarios and Application Environments

Metropolitan Area Network (MAN) Connectivity

In metropolitan area networks, the Cisco DWDM-SFP10G5979 is frequently used to connect distributed network nodes across cities or large campuses. Its 80km reach allows service providers to interconnect central offices, aggregation points, and data hubs efficiently while maintaining high bandwidth availability.

Enterprise Data Center Interconnect (DCI)

For enterprise environments, this transceiver supports data center interconnect applications where high-speed replication, backup, and virtualization workloads require low-latency optical links. The DWDM capability ensures efficient bandwidth utilization across inter-data center fiber routes.

Carrier Backbone and Telecom Infrastructure

Telecommunication providers leverage DWDM SFP+ modules in backbone networks to support high-capacity traffic aggregation. The Cisco DWDM-SFP10G5979 contributes to long-haul transport systems that form the backbone of internet service provider infrastructure, enabling scalable and resilient connectivity.

Optical Signal-to-Noise Ratio (OSNR) Requirements

OSNR is a critical parameter in DWDM systems, as it determines the quality of the received optical signal relative to background noise. The performance of the Cisco DWDM-SFP10G5979 is optimized to maintain sufficient OSNR levels even in multiplexed environments where multiple channels share the same fiber infrastructure.

Thermal Stability and Environmental Performance

The module is designed to operate reliably across varying temperature conditions typically found in telecom rooms, data centers, and outdoor enclosures. Thermal stability ensures consistent wavelength accuracy and prevents drift that could affect DWDM channel alignment.