The 3Com NJ100 Network Jack instantly expands a single Ethernet or Fast Ethernet LAN connection into four 10/100 switched ports at any desktop. Up to two optional pass-through ports accommodate dedicated subnets or analog voice lines. The jack's compact design lets you install it virtually anywhere you need more LAN connectivity without expensive rewiring or a tangle of cables. Replace an existing wall jack, or use it as the LAN outlet in modular office paneling.