Name: 3CRNJ240FXSCTAA-75 3Com IntelliJack NJ240FX 4-Port 10/100Base-TX + 1-Port 100Base-FX Compact Ethernet Switch
Brand: 3Com
SKU: 3CRNJ240FXSCTAA-75
Price: 85.54 USD
Availability: InStock
Rating: 4.8 (119 reviews)

Product Overview
The 3Com IntelliJack NJ240FX combines multiple Ethernet ports with a fiber interface to serve small-scale networking needs effectively. It fits neatly into setups where space and connection diversity matter, offering a practical bridge between standard copper networks and fiber links without fuss.

General Information
Brand	3Com
Part Number	3CRNJ240FXSCTAA-75
Condition	Refurbished

Technical Information
Switch Type	Managed Switch
Mount Type	Wall Mount
Switch Ports	5 (4 x 10/100Base-TX RJ-45, 1 x 100Base-FX fiber SC)
Number of Ports	5-Ports
Port Type	10/100Base-TX, RJ-45, SFP
Port Speed	10/100 Mbps
UpLink Ports	1 x 100Base‑FX SC uplink
POE Support	No
Switching Capacity	1 Gbps
VLAN Support	No
Stackable	No
Layer Support	Layer 2
Connector Type	RJ-45, SC multimode fiber

Management and Configuration
Remote Protocols	No

Power & Cooling
Fans	Fanless

Physical Characteristics
Dimensions	1.81" × 2.83" × 4.57"
Weight	4.00

Miscellaneous
Compliant Standards	IEEE 802.3, IEEE 802.3u, IEEE 802.3x

Product Description
The 3Com IntelliJack NJ240FX is a compact Ethernet switch designed to provide both copper and fiber connectivity options. It's often found in small office setups or branch locations where space is at a premium but reliable network access is necessary. This switch is built for users needing to connect multiple devices via copper Ethernet while also integrating fiber links for longer distance or higher interference-resistant connections. Key Features Four 10/100Base-TX ports offer versatile wired connections for various devices One 100Base-FX port enables fiber optic networking to extend reach beyond copper limits Compact design fits easily into tight networking racks or workspaces Supports auto-negotiation and full duplex for optimized throughput Simple plug-and-play setup reduces installation complexity This switch is commonly deployed in office closets, telecom rooms, or remote branch sites where mixed media connections are required. It provides a straightforward way to expand network capabilities without adding complexity. Its blend of copper and fiber ports makes it useful in environments where standard Ethernet and fiber coexist, delivering consistent performance over varied cabling.

Use Cases
The 3Com IntelliJack NJ240FX switch is well-suited for small office environments and remote branch locations that require a blend of copper and fiber connectivity within limited rack space. It benefits network administrators seeking reliable aggregation points where both fast Ethernet copper ports and fiber uplinks are needed to interconnect disparate network segments efficiently. How It's Used: Connecting multiple desktop workstations to a fiber backbone in small to medium-sized business (SMB) offices. Serving as an edge switch in retail stores or kiosks where space constraints demand a compact yet versatile network device. Linking remote office locations to central networks through fiber connections to support secure and stable communications. Integrating legacy 10/100Base-TX devices with newer fiber infrastructure in educational or healthcare campuses. Facilitating network segmentation in branch offices to improve traffic management and reduce broadcast domains. This switch enhances network performance by offering seamless interconnection between copper and fiber media, allowing for scalable deployment as organizational needs evolve. Its compact form and reliable technology support ongoing operational efficiency without requiring significant infrastructure changes.