Cisco SFP Module

The Cisco SFP Module is a compact, hot-swappable transceiver designed to extend your data networking capabilities with reliable 100Base-TX Fast Ethernet over copper. This copper SFP module plugs into any Cisco switch, router, or network device equipped with an SFP slot, delivering up to 100 Mbps over standard twisted pair copper cabling. Ideal for office LANs, edge deployments, or retrofit projects where Fast Ethernet remains in use, this SFP module offers plug-and-play convenience, low power consumption, and a seamless upgrade path for upgrading legacy infrastructure without a full hardware overhaul.

• High-performance 100 Mbps over copper — This Cisco SFP Module delivers the 100Base-TX data rate over twisted pair copper, enabling reliable Fast Ethernet connectivity for desktops, printers, IP cameras, and edge devices. Designed for short to medium distances, it helps future-proof existing networks by enabling faster access to local resources without overhauling cabling. With auto-negotiation, devices can negotiate the best speed and duplex settings, ensuring optimal performance with minimal configuration.
• Hot-swappable and maintenance-friendly — The hot-swappable SFP design lets you install or replace the module without powering down the entire chassis, minimizing downtime in busy networks. This practical capability is especially valuable for data centers, campus networks, and branch offices where service continuity matters. The module is built for Cisco-grade reliability, delivering consistent performance in demanding environments while simplifying routine maintenance and upgrades.
• Compact SFP form factor with Cisco compatibility — The SFP form factor fits into any device with a standard SFP slot, including Cisco switches, routers, and media converters. Its compact, standardized design ensures broad compatibility across Cisco and select third-party equipment that adheres to industry SFP specifications. This flexibility makes it easy to extend existing networks or segment traffic without a costly equipment upgrade.
• Cost-effective upgrade for legacy networks — For networks still relying on 100 Mbps Fast Ethernet, this Cisco SFP Module provides a cost-efficient path to broaden connectivity and improve network efficiency. By leveraging copper-based 100Base-TX, you can maximize existing cable investments and support rising user demands, while maintaining straightforward management and compatibility with familiar Cisco management interfaces.
• Reliable Cisco-grade performance and support — Built to Cisco’s high standards, this SFP Module offers dependable operation, consistent link quality, and compatibility with Cisco device firmware and management tools. Its proven reliability helps minimize downtime and support long-term network stability, backed by Cisco documentation and support ecosystems for troubleshooting and optimization.

Technical Details of Cisco SFP Module

• Data Rate — 100 Mbps (100Base-TX)
• Interface — 1 x 100Base-TX RJ-45 copper interface
• Cable Type — Twisted pair copper (Cat5e/6 recommended)
• Distance — Up to 100 meters (328.08 feet) over appropriate copper cabling
• Form Factor — Small Form-factor Pluggable (SFP)
• Hot-Swappable — Yes, supports hot-swapping for minimal downtime
• Standards — IEEE 802.3u, 100Base-TX compliant
• Compatibility — Designed for Cisco devices with SFP slots; supports standard SFP ecosystem

How to install Cisco SFP Module

• Prepare and inspect — Ensure you have the correct Cisco device with an available SFP slot. Power down or verify maintenance windows if you prefer, though this module supports hot-swapping. Ground yourself to prevent static damage and handle the module by its edges.
• Remove protective cap — If the SFP port has a protective dust cap, remove it to expose the connector while keeping the cap handy for future removal.
• Align and insert — With the module oriented correctly, gently insert it into the SFP slot until it seats securely. You should hear or feel a subtle click when it is fully engaged.
• Connect the copper link — Attach a Category 5e/6 copper Ethernet cable to the RJ-45 interface on the module. Ensure the connection is snug and the cable is routed to avoid tension or bending near the connector.
• Verify and configure — Power on the device if needed and check the link status LEDs on both the module and switch. Confirm that the port negotiates to 100 Mbps and the correct duplex setting. If automatic negotiation isn’t optimal in your environment, configure the port for the desired speed and duplex on the switch console or management interface.
• Monitor and troubleshoot — Use the switch's management interface to verify port status, error counters, and link stability. If a link fails to come up, re-seat the module, test with a different CAT cable, and verify that the device supports 100Base-TX operation on that port.

Frequently asked questions

• What is the Cisco SFP Module used for? — It provides 100Base-TX Fast Ethernet connectivity over copper twisted-pair cabling, enabling Ethernet uplinks and extensions via Cisco devices with SFP slots. It’s ideal for upgrading legacy networks or adding flexible copper links where fiber is unnecessary or impractical.
• Is this SFP module compatible with all Cisco switches? — It is designed for Cisco devices that support SFP modules and for equipment that adheres to standard SFP specifications. It’s best to confirm compatibility with your specific model and firmware version in Cisco’s documentation or the device’s hardware compatibility list.
• What is the maximum distance supported by 100Base-TX copper? — The standard distance is up to 100 meters (328.08 feet) on proper Cat5e/Cat6 cabling, which is sufficient for most office and campus edge deployments.
• Do I need fiber optic cables for this module? — No. This SFP Module uses copper twisted-pair cabling (RJ-45) for 100Base-TX, not fiber optic cabling. If you require longer distances or higher speeds, you would need a different module—such as a fiber-based SFP or higher-speed transceiver.
• How can I troubleshoot a link not coming up? — First, verify the SFP is properly seated and that the RJ-45 cable is in good condition and correctly connected. Check port settings (speed/duplex) on the switch, ensure auto-negotiation compatibility, and inspect LED indicators. If necessary, test with an alternate cable and a different switch port to isolate the issue.