Cisco C3KX-NM-1G=

Overview

The Cisco C3KX-NM-1G= is a 4-port gigabit expansion module designed to enhance the connectivity of Cisco Catalyst 3560X and 3750X series switches. It provides four slots for 1-Gigabit SFP modules, enabling flexible fiber or copper connections tailored to your network requirements. With support for data transfer speeds up to 1000 Mbps, this module helps maintain fast and reliable network performance while allowing you to scale your infrastructure efficiently.

Its lightweight design, weighing just 3 pounds, makes it easy to install in both desktop and rack-mounted environments. This module is ideal for IT professionals managing growing networks in small to medium-sized businesses, educational institutions, or branch offices that need to add more gigabit ports without replacing existing hardware.

Key features

• Four 1-Gigabit SFP module slots that provide flexible options for fiber or copper connections
• Compatibility with a wide range of standard SFP modules, allowing easy customization and upgrades
• Reliable Ethernet interface that integrates seamlessly with existing Cisco Catalyst switches
• Supports data transfer speeds up to 1000 Mbps to ensure consistent network performance
• Lightweight design at just 3 pounds, simplifying installation and handling
• Designed specifically for Cisco Catalyst 3560X and 3750X series switches to expand port capacity

Key specs

• Number of ports: 4 SFP slots
• Data transfer rate: up to 1000 Mbps (1 Gbps)
• Compatibility: Cisco Catalyst 3560X and 3750X series switches
• Weight: approximately 3 pounds
• Interface type: Ethernet

Connectivity and compatibility

This expansion module supports a variety of standard 1-Gigabit SFP modules, giving you the flexibility to choose fiber or copper connections based on your network setup. It integrates directly with Cisco Catalyst 3560X and 3750X switches, making it a straightforward way to increase port density without changing your existing switch infrastructure.

• Supports both fiber and copper SFP modules for versatile network configurations
• Compatible with Cisco Catalyst 3560X and 3750X series for seamless integration

Ideal uses and environments

The module is well suited to environments where network growth demands additional gigabit ports without the expense of replacing switches. It fits well in small to medium-sized business networks, branch offices, and educational institutions where reliable and scalable connectivity is essential. IT teams can quickly expand network capacity to support new devices and increased traffic with minimal disruption.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Shipping costs are calculated at checkout based on destination, total weight, and selected speed. Free shipping applies to carts over $100 (excluding heavyweight items). All available options and final pricing are clearly shown before payment so you can choose the service that best fits your needs.

Deliveries are handled by major carriers such as USPS, UPS, and FedEx. Estimated delivery times are displayed at checkout and may vary depending on service level and location. Please note that these are estimates and can be affected by weather, holidays, or carrier volume. Once your order ships, you’ll receive a tracking number for real-time updates from pickup to final delivery.

Providing an accurate shipping address helps prevent delays, and changes may be limited once the order has been dispatched. P.O. boxes are supported only when permitted by the selected carrier. Packaging and handoff are optimized to protect items during transit, though oversized or high-weight products may require special handling. All shipping methods and any related constraints are clearly shown during checkout.

Learn more

Returns are accepted within 30 days of delivery. Items must be unused, in the same condition received, with tags, manuals, accessories, and original, unaltered packaging. Any item kept will be deducted from the refund. Start a return by sending us an email. Items sent back without approval may be refused or returned to the sender.

Some items are not returnable: opened TVs/combos/monitors 37″+, opened computers or software, electronic downloads, opened consumables (film, paper, bulbs, media, ink), custom or modified computers, special-order or “nonreturnable” items, submerged underwater gear, and opened educational media.

After inspection, refunds are issued to the original payment method; allow 5–7 business days for the credit to post. Shipping, handling, customs duties, and import taxes are nonrefundable. If an item is used, incomplete, or not in original condition, a 30% restocking fee may apply. Direct exchanges are not offered; purchase the replacement and return the original for a refund.

We act solely as a reseller. Any product warranty is provided and administered by the manufacturer, not by our store. That means eligibility, coverage, and outcomes are determined by the manufacturer’s policy for each brand and model. Before purchasing, we recommend reviewing the warranty terms on the manufacturer’s website or in the product documentation to confirm what is covered and for how long.

If you need warranty service, please file the claim directly with the manufacturer. They may require proof of purchase, the product serial number, original packaging, photos, or basic troubleshooting. Some brands ask you to register the product or obtain a case number before shipping it for repair or replacement. We don’t submit or approve claims, but we can point you to the correct support links and contact details.

Keep your invoice and packaging in a safe place, and report any functional issues to the manufacturer as soon as they appear. If you’re unsure whether a problem is covered, the manufacturer’s support team can confirm next steps and timelines. While we cannot intervene in decisions or outcomes, we’re happy to provide purchase documentation or guidance so you can move through the warranty process smoothly.

Learn more