10-3388-03 Cisco LC Multi-Mode 25 GBPS Transceiver.

Cisco 10-3388-03 LC Multi-Mode SFP28 Transceiver

The Cisco 10-3388-03 represents a high-performance optical transceiver module designed for modern data center and enterprise networking environments. This specific model functions as an SFP28 (Small Form-Factor Pluggable 28) transceiver operating at 25 gigabits per second. The module features an LC duplex connector interface and utilizes multi-mode fiber optic technology, making it an essential component for high-speed network infrastructure deployments requiring reliable short to medium distance connectivity solutions.

Form Factor and Physical Dimensions

This transceiver conforms to the SFP28 mechanical specification, maintaining backward compatibility with SFP+ form factor slots while supporting increased data rates. The module dimensions adhere to the MSA (Multi-Source Agreement) standards, measuring approximately 8.5mm in height, 13.4mm in width, and 56.5mm in depth. This compact design enables high port density deployment in switching platforms, allowing network administrators to maximize connectivity within limited rack space.

Performance Characteristics

Data Transmission Capabilities

This 25GBASE-SR SFP28 transceiver supports data rates of 25.78125 Gbps, compliant with IEEE 802.3by standards. The module is engineered to operate over OM3 and OM4 multi-mode fiber types, providing flexible deployment options for existing and new fiber infrastructure. The electrical interface utilizes a 25Gbps electrical serial interface, while the optical interface employs 850nm VCSEL (Vertical Cavity Surface Emitting Laser) technology for efficient multi-mode fiber transmission.

Transmission Distance Specifications

The maximum supported transmission distance varies depending on the fiber type: up to 70 meters over OM3 multi-mode fiber and up to 100 meters over OM4 multi-mode fiber. These distance specifications make the transceiver ideal for intra-rack, inter-rack, and data center top-of-rack switching applications. The module maintains a bit error rate (BER) of better than 10^-12, ensuring data integrity across all supported transmission distances.

Optical Performance Parameters

The transmitter section features an 850nm VCSEL with an average launch power ranging from -4.3 to +2.4 dBm. The receiver incorporates a PIN photodiode with a sensitivity of -7.9 dBm minimum and an overload of +2.4 dBm maximum. The extinction ratio is maintained at 3.5 dB or greater, while the relative intensity noise (RIN) is controlled at -128 dB/Hz or lower. These optical characteristics ensure stable performance across the specified operating conditions.

Compatibility and Interoperability

Cisco Platform Compatibility

The Cisco 10-3388-03 transceiver is qualified and tested for compatibility across a wide range of Cisco switching platforms. Compatible systems include the Nexus 3000 series (3032C-V, 3064, 3064-T, 31108TC-V, 31128PQ, 3132Q-V, 3164Q, 3232C, 3264Q), Nexus 9000 series (93108TC-EX, 93120TX, 93180YC-EX, 9332PQ, 9336PQ, 9364C), and MDS 9700 series directors. The module also supports UCS 6200 and 6300 series fabric interconnects, providing comprehensive coverage for data center networking requirements.

Fiber Optic Connection

When connecting fiber optic cables, inspect both connector ends for cleanliness using appropriate fiber inspection tools. Contaminated connectors can cause performance degradation or permanent damage to the optical interfaces. Use only certified OM3 or OM4 multi-mode fiber cables with LC duplex connectors. Ensure the cable bend radius does not exceed the manufacturer's specifications, typically 20mm for installation and 10mm during operation, to minimize signal attenuation and potential fiber damage.

Link Performance Optimization

For optimal link performance, verify that the received optical power falls within the specified range of -7.9 dBm to +2.4 dBm. Values approaching either threshold may indicate marginal link conditions that could affect long-term reliability. Monitor the laser bias current, as significant increases over time may indicate aging of the optical components. Regular monitoring of these parameters enables proactive maintenance and prevents unexpected network outages.

Applications and Use Cases

Data Center Networking Applications

The Cisco 10-3388-03 transceiver is particularly well-suited for 25GbE server connectivity in leaf-spine data center architectures. The 25Gbps data rate provides an optimal balance between cost and performance, offering 2.5 times the bandwidth of 10GbE while maintaining similar power and space requirements. This makes it ideal for connecting servers to top-of-rack switches in hyper-scale data centers, cloud infrastructure, and enterprise private cloud environments.

Storage Area Network Implementations

In storage networking, this transceiver supports 32G Fibre Channel over Ethernet (FCoE) implementations, providing high-speed connectivity for storage arrays and servers. The low latency characteristics make it suitable for storage traffic where consistent performance is critical. When deployed in Cisco MDS switches, the module enables unified fabric architectures that consolidate LAN and SAN traffic over a single network infrastructure.

High-Performance Computing Environments

High-performance computing clusters benefit from the 25Gbps bandwidth for internode communication, particularly in research institutions, financial trading systems, and scientific computing applications. The multi-mode fiber compatibility allows for cost-effective deployment within computing racks and between adjacent racks where transmission distances fall within the 100-meter specification. The transceiver's low power consumption contributes to reduced cooling requirements in dense computing environments.

Network Upgrade and Migration Scenarios

Organizations with existing 10GbE infrastructure can leverage this transceiver for gradual network upgrades. Many Cisco switches support mixed configurations of 10GbE and 25GbE, allowing phased migration paths. The SFP28 form factor maintains mechanical compatibility with SFP+ slots, providing flexibility in deployment options. Existing OM3/OM4 fiber infrastructure can typically be reused, reducing upgrade costs and complexity.

Technical Standards and Compliance

Industry Standards Conformance

The Cisco 10-3388-03 transceiver complies with multiple industry standards and specifications. It meets the IEEE 802.3by 25GBASE-SR standard for physical layer specifications and management parameters. The module conforms to SFP28 MSA (Multi-Source Agreement) specifications for mechanical dimensions, electrical interface, and management interface. Additional compliance includes RoHS Directive 2011/65/EU for restriction of hazardous substances and relevant portions of TIA-785 for short-wavelength laser safety.

Environmental and Safety Compliance

The transceiver meets various environmental standards including China RoHS for restriction of hazardous substances in electronic products marketed in China. It complies with WEEE (Waste Electrical and Electronic Equipment) directives for proper disposal and recycling. Electrostatic discharge protection meets the requirements of MIL-STD-883 Method 3015, providing ESD protection of at least 2kV for the electrical interface. The optical interface includes Class 1 laser safety features that prevent exposure to hazardous radiation levels during normal operation and maintenance.