3Com 07-0408-000 PCMCIA Dongle 10/100 RJ-45 Ethernet LAN Adapter Cable

3Com 07-0408-000 PCMCIA Dongle 10/100 RJ-45 Ethernet LAN Adapter Cable

The 3Com 07-0408-000 is a PCMCIA dongle cable that connects a 3Com PC Card (PCMCIA) network interface card to a standard RJ-45 Ethernet jack. One end plugs into the PCMCIA NIC card's dongle port; the other end provides a female RJ-45 port for a standard Cat5/Cat5e patch cable. This dongle is required for the NIC to connect to a wired 10/100 Ethernet network — the PCMCIA card itself does not have a built-in RJ-45 port. Manufactured by Foxconn for 3Com.

Specifications & What's Included

• Part Number: 07-0408-000
• Manufactured by: Foxconn for 3Com
• Interface: PCMCIA (PC Card) proprietary dongle connector
• Network connector: RJ-45 (8P8C) female
• Supported speeds: 10BaseT / 100BaseTX (10/100 Mbps)
• Compatible with: 3Com PCMCIA 10/100 NIC cards (requires matching dongle port)
• Cable style: short flexible pigtail dongle, approximately 4–5 inches
• Includes: dongle cable only — no PCMCIA NIC card included

Applications

PCMCIA (PC Card) network adapter dongles like this one were standard accessories for laptop NICs of the late 1990s and early 2000s. Because PCMCIA cards are too thin to house a full-depth RJ-45 port directly, manufacturers used a short dongle cable to bring the Ethernet connector out to a usable position while keeping the card slim in the slot. The 3Com 07-0408-000 pairs specifically with 3Com's PCMCIA 10/100 network cards and is a commonly needed replacement for users maintaining older laptops — IBM ThinkPads, Toshiba Satellites, Compaq Armada, and similar machines from that era — that relied on 3Com PC Card NICs for wired network connectivity. These dongles are frequently lost or damaged, making the replacement market active among legacy laptop users and IT support organizations maintaining older equipment.