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3Com 3C6021 NetBuilder II Ethernet Module AUI & BNC Connections

3Com 3C6021 NetBuilder II Ethernet Module AUI & BNC Connections
3Com 3C6021 NetBuilder II Ethernet Module AUI & BNC Connections
Overview The 3Com NetBuilder II Ethernet Module (model 3C6021) provides a versatile interface for legacy Ethernet networks that require both AUI and BNC (coaxial) connections. Designed for the NetBuilder II system, this module lets you integrate olde... Read More
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$389.95
  • In Stock: 7
  • Manufacturer: 3Com
  • Model or Part: 3C6021
  • Condition: Refurbished
  • Weight: 4.00lb
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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 NetBuilder II Ethernet Module (model 3C6021) provides a versatile interface for legacy Ethernet networks that require both AUI and BNC (coaxial) connections. Designed for the NetBuilder II system, this module lets you integrate older 10Base5 and 10Base2 cabling with modern network equipment, extending the life of existing infrastructure while delivering reliable performance.

Key Features

  • Dual media support - AUI connector for external transceivers and BNC connector for thin coaxial cable
  • Plug-in design for easy installation in the NetBuilder II chassis
  • Supports 10 megabit per second Ethernet (10BASE5 and 10BASE2)
  • Robust metal housing for EMI shielding and durability
  • LED indicators for link status and activity
  • Compatible with standard 3Com NetBuilder II backplane specifications

Technical Specifications

  • Manufacturer: 3Com
  • Model/Part Number: 3C6021
  • Interface: AUI (Attachment Unit Interface) and BNC (Bayonet Neill Conway)
  • Data Rate: 10 Mbps
  • Cable Types: Thick coax (10BASE5) via AUI, thin coax (10BASE2) via BNC
  • Operating Temperature: 0 to 70 deg C
  • Power Consumption: less than 2 watts
  • Dimensions: fits standard NetBuilder II slot (approx 1.75 in height)
  • Compliance: FCC Part 15, CE

Typical Applications

  • Legacy office or campus networks that still use coaxial Ethernet cabling
  • Industrial environments where rugged cabling is required
  • Network upgrades that need to bridge old and new equipment without rewiring
  • Educational institutions maintaining historic lab setups
  • Small to medium businesses extending the useful life of existing Ethernet infrastructure

By adding the 3C6021 NetBuilder II Ethernet Module, you gain flexible connectivity options, protect your investment in older cabling, and ensure seamless communication across mixed media networks.