30-1299-03 Cisco 1000BASE-LX/LH SFP Transceiver Module.

Overview of Cisco 30-1299-03 1000BASE-LX/LH SFP (Mini-GBIC) Transceiver Module

The Cisco 30-1299-03 1000BASE-LX/LH SFP (Mini-GBIC) Transceiver Module is a highly reliable and versatile networking component designed to support Gigabit Ethernet and Fiber Channel applications over long distances. This small form-factor pluggable (SFP) module allows businesses and data centers to deploy cost-effective optical connectivity solutions without compromising performance or compatibility. Supporting both long-haul (LH) and long-wavelength (LX) communication standards, it integrates seamlessly into Cisco switches and routers, providing scalable, high-performance fiber connectivity.

Technical Specifications

Form Factor and Build Quality

The 30-1299-03 transceiver uses a compact SFP (Mini-GBIC) design, which enables easy insertion and removal in compatible networking equipment. Its hot-swappable nature allows for on-the-fly replacement and upgrades, minimizing downtime and increasing operational flexibility. Designed with durability in mind, the transceiver features high-quality components that meet Cisco’s strict manufacturing standards, ensuring long-term reliability even in demanding network environments.

Performance Characteristics

• Data Rate: Up to 1.25 Gbps (Gigabit Ethernet)
• Wavelength: 1310 nm
• Distance Support: Up to 10 km (6.2 miles) over single-mode fiber (SMF)
• Connector Type: LC Duplex
• Fiber Type: Single-mode (SMF); compatible with multimode with mode conditioning patch cord (MCP)
• DOM Support: Digital Optical Monitoring (depending on switch compatibility)

Compatibility and Interoperability

The Cisco 30-1299-03 module is engineered for maximum compatibility with a wide range of Cisco networking devices including switches, routers, and firewalls. It supports IEEE 802.3z 1000BASE-LX standard, ensuring seamless interoperability in multi-vendor environments. The module is also often compatible with Cisco Catalyst and Nexus series, making it a popular choice across enterprise, service provider, and data center applications.

Key Features and Benefits

High-Speed Data Transmission

With transmission speeds of up to 1.25 Gbps, the 30-1299-03 delivers reliable performance for high-bandwidth applications such as video streaming, voice over IP (VoIP), and data backup. This makes it suitable for enterprise environments where consistent data throughput is critical.

Extended Range Connectivity

One of the most attractive features of this transceiver is its extended range. Capable of transmitting data over distances of up to 10 km on standard single-mode fiber, it supports long-range network deployment without the need for signal repeaters or amplifiers.

Hot-Swappable Functionality

As a hot-swappable module, the Cisco 30-1299-03 allows network technicians to install or replace the unit without powering down the system. This capability is especially beneficial in mission-critical environments where uptime is a top priority.

Energy Efficiency

The module consumes minimal power, contributing to lower operational costs and reduced heat output. Its efficient design ensures performance without compromising sustainability, aligning with modern data center energy practices.

Digital Optical Monitoring (DOM)

Some versions of the 30-1299-03 support Digital Optical Monitoring, enabling real-time access to operational parameters such as temperature, optical power, and transceiver voltage. This feature enhances network manageability and fault diagnostics.

Application Scenarios

Enterprise Backbone Connectivity

The module is ideal for linking core switches in an enterprise network over long distances. It helps build a robust and scalable network backbone capable of supporting diverse digital workflows and high traffic loads.

Data Center Interconnects

In data centers, the 30-1299-03 plays a pivotal role in interconnecting servers, storage systems, and switches. Its high performance and long reach make it suitable for large-scale deployments across server racks or between buildings.

Campus Network Integration

Campuses that span multiple buildings can use this module to establish high-speed fiber links between facilities. Its 10 km range and SFP form factor make it well-suited for bridging long distances on campus networks.

Service Provider Networks

ISPs and telecom providers utilize this transceiver in edge and aggregation layers of their networks. Its support for single-mode fiber and long-distance operation aligns with the requirements of metropolitan and regional networks.

Common Use Cases in Networking

Redundant Uplink Ports

Many network switches support redundant uplinks using dual SFP ports. The 30-1299-03 serves as a reliable transceiver for building resilient topologies with failover capabilities, reducing the risk of network outages.

Disaster Recovery and Backup Networks

Organizations implementing DR (Disaster Recovery) strategies leverage this module to establish reliable and high-speed fiber links to off-site backup locations. The long-distance capability ensures effective data replication and continuity.

Video Surveillance and IP Camera Networks

High-resolution IP camera systems generate significant data. The Cisco 30-1299-03 supports efficient aggregation and transmission of surveillance video across campus or metropolitan fiber infrastructures.

High-Density Aggregation Switches

In dense aggregation layers, this transceiver provides a space-efficient and scalable solution for connecting multiple access switches to core or distribution switches via fiber.

Comparative Advantages

Versus Copper Transceivers

Compared to RJ-45 copper-based Gigabit transceivers, the Cisco 30-1299-03 offers greater range, better signal integrity, and immunity to electromagnetic interference. These advantages make it ideal for mission-critical and long-distance applications.

Versus Multi-Mode Fiber SFPs

While multi-mode SFPs are suitable for short distances, the 30-1299-03 outperforms them when it comes to reach. It eliminates the need for additional switches or media converters in extended fiber runs, simplifying infrastructure design.

OEM vs Cisco Certified

While third-party OEM modules may offer cost savings, Cisco-certified transceivers like the 30-1299-03 ensure maximum compatibility, firmware support, and compliance with manufacturer warranties. Cisco's SmartNet and TAC services typically exclude unsupported modules, making genuine components the safer choice.

Procurement and Availability

Availability on the Market

The Cisco 30-1299-03 is widely available through authorized Cisco distributors, resellers, and online marketplaces. It is often stocked by vendors specializing in enterprise and data center networking equipment.

Used and Refurbished Options

Many IT procurement teams consider refurbished modules to reduce costs. Cisco offers certified refurbished units through its official channels, which undergo rigorous testing to meet quality standards.

Part Numbers and Ordering Info

The module is typically referenced by part numbers such as 30-1299-03 and may also be listed under Cisco product ID GLC-LH-SMD. Always verify compatibility with your device’s datasheet or official documentation.

Environmental and Compliance Standards

RoHS Compliance

The Cisco 30-1299-03 meets Restriction of Hazardous Substances (RoHS) standards, ensuring environmental responsibility by limiting the use of harmful materials.

Operating Conditions

• Operating Temperature: 0°C to 70°C (32°F to 158°F)
• Storage Temperature: -40°C to 85°C (-40°F to 185°F)
• Humidity: 10% to 85% non-condensing

MTBF and Reliability

The module boasts an industry-leading Mean Time Between Failures (MTBF), typically exceeding 1 million hours. This reliability rating ensures minimal disruption and long service life under normal operating conditions.

FAQs and Troubleshooting Tips

Does this module support DOM?

Yes, many Cisco 30-1299-03 modules support Digital Optical Monitoring, but feature availability may vary by switch model and IOS version.

This with multimode fiber

Although optimized for single-mode fiber, it can be used with multimode fiber via a mode conditioning patch cable. This helps mitigate modal dispersion and ensures stable performance.

Is it compatible with third-party switches

While Cisco designs its modules for Cisco devices, they may function in some third-party equipment. However, full support, including DOM, may not be available unless certified by the switch vendor.