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3Com 3CB9LF20R CoreBuilder 9000, 20-Port 10/100 Fast Ethernet RJ45 Layer 2 Switching Module

3Com 3CB9LF20R CoreBuilder 9000, 20-Port 10/100 Fast Ethernet RJ45 Layer 2 Switching Module
3Com 3CB9LF20R CoreBuilder 9000, 20-Port 10/100 Fast Ethernet RJ45 Layer 2 Switching Module
Overview The 3Com CoreBuilder 9000 20-Port 10/100 Fast Ethernet RJ45 Layer 2 Switching Module (model 3CB9LF20R) delivers reliable, high-performance connectivity for enterprise and campus networks. Designed as a compact, hot-swappable line card, it in... Read More
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$116.95
  • In Stock: 1
  • Manufacturer: 3Com
  • Model or Part: 3CB9LF20R
  • Condition: Refurbished
  • Weight: 15.00lb
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Item Condition

New - Sealed or Open Box Condition
Excellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item

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Overview

The 3Com CoreBuilder 9000 20-Port 10/100 Fast Ethernet RJ45 Layer 2 Switching Module (model 3CB9LF20R) delivers reliable, high-performance connectivity for enterprise and campus networks. Designed as a compact, hot-swappable line card, it integrates seamlessly into CoreBuilder chassis to expand network capacity while maintaining low latency and robust traffic management.

Key Features

  • Twenty 10/100 Mbps RJ45 ports for flexible device attachment
  • Full Layer 2 switching with support for VLANs, STP, RSTP and MSTP
  • Plug-and-play hot-swap capability reduces downtime during upgrades
  • Low power consumption and fan-less design for quiet operation
  • Comprehensive QoS with 8 priority queues per port to prioritize voice and video traffic
  • Built-in security features including port security, MAC address filtering and DHCP snooping

Technical Specifications

  • Model/Part Number: 3CB9LF20R
  • Port Type: RJ45 10/100 Fast Ethernet
  • Number of Ports: 20
  • Switching Capacity: 2 Gbps
  • Forwarding Rate: 1.5 Mpps
  • MAC Address Table: 8K entries
  • Operating Temperature: 0 to 40 deg C
  • Power Supply: 12 VDC, 2 A
  • Dimensions: 1U height, standard 19 inch rack mount

Typical Applications

  • Campus and branch office Ethernet aggregation
  • Connecting workstations, IP phones, printers and access points
  • Layer 2 edge switching in data center top-of-rack deployments
  • Network upgrades where minimal disruption and hot-swap capability are critical
  • Environments that require secure, managed Ethernet access with QoS for voice and video

With its proven 3Com reliability and feature-rich design, the CoreBuilder 9000 20-Port Fast Ethernet module provides a cost-effective solution for expanding network capacity while delivering the performance and control needed in modern wired infrastructures.