Vertiv LC-MM-SFP SFP Multi Mode Fiber Module
Overview
The Vertiv LC-MM-SFP is a small form-factor pluggable (SFP) multi mode fiber module with LC connectors, designed to extend KVM, AV, and signal connections over fiber optic cable in rack and data center environments where copper falls short. If you are planning a fiber extension for a Vertiv KVM or signal distribution system and need to plug into existing multi mode plant — OM3 or OM4 runs already in the building — the LC-MM-SFP is the direct-fit transceiver for that job. It occupies a standard SFP slot on compatible Vertiv host equipment and converts electrical signals to optical for transmission across multi mode fiber with LC-type connectors on both ends.
Vertiv publishes this module alongside three sibling accessories in the same family: the Vertiv LC-SM-SFP for single mode runs, the RJ45-CATX-SFP 1000BASE-T copper transceiver for Cat5e/Cat6 runs, and the 10Gb HMX-MM-10G-SFP and HMX-SM-10G-SFP modules for higher-bandwidth HMX-series deployments. Knowing which fiber type is already installed is the single most important pre-purchase question — multi mode and single mode are not interchangeable at the transceiver layer.
Key Features
- Multi Mode Fiber (MMF) Support: Pairs with existing OM1/OM2/OM3/OM4 multi mode plant using LC duplex connectors — the connector type most commonly pre-installed in data centers and server rooms built in the last 15 years. No re-termination required if your runs are already LC-terminated MMF.
- LC Connector Interface: LC (Lucent Connector) is a compact, latching connector that fits in high-density patch panels without the bulk of older SC connectors. This matters in fiber optic cabling environments where rack-unit space is at a premium.
- SFP Form Factor: Standard small form-factor pluggable design slots directly into the SFP cage on compatible Vertiv host units — hot-swap capable on most platforms, meaning you can swap or replace the module during a maintenance window without powering down the chassis.
- Fiber-over-Distance Advantage: Multi mode fiber eliminates the 100m distance ceiling of copper Cat cable for KVM and signal extension. For runs across a data center floor, between adjacent buildings, or through conduit where copper attenuation becomes a problem, fiber is the correct medium. Exact distance depends on the host equipment and the fiber grade in place.
- Family Scalability: The LC-MM-SFP sits in a modular ecosystem. When bandwidth requirements grow — for example, moving from standard KVM signals to 10Gb video extension — the HMX-MM-10G-SFP drops into the same form factor on HMX-series hardware without rewiring the fiber plant, provided OM3 or OM4 cable is already in place.
- Reduced Electromagnetic Interference: Fiber carries no copper conductor, so it is immune to EMI from motor drives, UPS systems, generators, and other electrical equipment common in data center and industrial environments. In server rooms where dense power distribution creates interference floors, fiber links maintain signal integrity that copper cannot.
Integration and Compatibility
The LC-MM-SFP is designed for use with Vertiv KVM switches, extenders, and matrix systems that include an SFP expansion slot. Vertiv's product line includes complementary network switches and signal extension hardware where this module provides the fiber interface. The companion single mode module (LC-SM-SFP) covers long-haul runs over OS1/OS2 fiber where multi mode reach is insufficient — typically for inter-building runs exceeding the multi mode distance threshold. For copper-based installations where fiber is not available, the RJ45-CATX-SFP provides a 1000BASE-T alternative in the same SFP slot.
Before ordering, confirm that the target Vertiv host unit lists SFP module support in its specification sheet, and verify whether the installed fiber plant is multi mode (typically identified by orange or aqua jacket) or single mode (typically yellow jacket). Pairing an MMF module with SMF cable — or vice versa — will not produce a working link. Consult your KVM infrastructure documentation to confirm the required SFP type for your specific platform.
For environments that require 10Gb throughput — for instance, HMX-series high-performance KVM extenders used in broadcast or control room applications — evaluate the HMX-MM-10G-SFP instead of the LC-MM-SFP, as the 10Gb variant is specifically designed for that host hardware family.
Frequently Asked Questions
Q: What is the difference between the LC-MM-SFP and the LC-SM-SFP?
A: The LC-MM-SFP is a multi mode fiber module, intended for use with OM1, OM2, OM3, or OM4 multi mode fiber cable typically found in shorter intra-building runs. The LC-SM-SFP is a single mode fiber module for OS1/OS2 single mode cable used in longer-distance runs, such as inter-building connections. The two are not interchangeable — match the module type to the fiber type installed in your environment.
Q: What connector type does the LC-MM-SFP use?
A: The LC-MM-SFP uses LC (Lucent Connector) type connectors on the fiber side. LC is a compact duplex connector common in data center and enterprise fiber infrastructure installed over the past 15 years. If your existing patch panel or fiber runs terminate in SC or ST connectors, you will need an LC adapter or re-termination before this module can be used.
Q: Which Vertiv host equipment is the LC-MM-SFP compatible with?
A: The LC-MM-SFP is compatible with Vertiv KVM switches, extenders, and matrix systems that include an SFP expansion slot. Verify your specific host unit's specification sheet to confirm SFP module compatibility. For Vertiv HMX-series high-performance extenders requiring 10Gb bandwidth, use the HMX-MM-10G-SFP instead.
Q: Can the LC-MM-SFP be used with the RJ45-CATX-SFP copper module in the same system?
A: The LC-MM-SFP and RJ45-CATX-SFP are both SFP-form-factor modules within the same Vertiv accessory family, but they serve different media types — fiber versus copper Cat cable. They can coexist in a system with multiple SFP slots, but a single SFP port accepts only one module at a time. Choose based on the cable medium available at each connection point.
Q: Is the LC-MM-SFP hot-swappable?
A: SFP modules are generally hot-swap capable on most SFP-enabled host platforms, allowing replacement during maintenance windows without powering down the chassis. Confirm hot-swap support in your specific Vertiv host unit's documentation before performing a live swap in production.
The LC-MM-SFP is a straightforward but load-bearing component in any Vertiv KVM or signal-extension deployment where the cable plant is multi mode fiber with LC terminations. I have seen this module specified on data center consolidation projects where the customer already had OM3 horizontal runs in place and needed to bring KVM signals across the floor without pulling new copper — the LC-MM-SFP drops into the SFP slot and the existing fiber does the work.
Technical Highlights:
- Multi Mode LC Interface: Terminates directly on LC duplex connectors — the dominant connector format in enterprise fiber infrastructure built after 2005. No patch cord adapters needed if your runs are already LC-to-LC.
- SFP Slot Compatibility: Standard SFP form factor means this module fits any Vertiv host unit with an SFP expansion bay — the same physical slot accommodated by the LC-SM-SFP, RJ45-CATX-SFP, and the 10Gb HMX variants, giving you media flexibility without hardware changes.
- Fiber Medium Benefits: No copper conductor means zero EMI susceptibility — a real operational advantage in data centers with high-density power infrastructure, UPS banks, or generator transfer switches running in proximity to the KVM signal path.
Deployment Considerations:
- Verify the fiber jacket color before ordering: multi mode is typically orange (OM1/OM2) or aqua (OM3/OM4); single mode is yellow. A mismatched module-to-fiber pairing produces no link, not a degraded one.
- If the deployment is on HMX-series Vertiv hardware and requires 10Gb throughput — broadcast control rooms or high-performance KVM applications — the LC-MM-SFP is not the right pick; use the HMX-MM-10G-SFP, which is purpose-rated for that platform and bandwidth tier.
For data center KVM consolidation projects where OM3 or OM4 fiber is already home-run to the rack, the LC-MM-SFP is the correct, lowest-friction transceiver to close the fiber extension loop on compatible Vertiv equipment — no rewiring, no new conduit, just the module and the patch cord.
