XJACK
TYPE OF EXTENDABLE CONNECTOR OR ANTENNA FOR A TYPE II PC CARD
X-jack; X-JACK; X-Jack; XJack; Xjack
In laptop computing, the XJACK is a type of extendable connector or antenna for a type II PC card, designed by the Megahertz subsidiary of 3Com. When not in use, the XJACK retracts into the PC card for storage.