US Robotics Mhz 56k PC Card Modem XJ1560 w/ xjack connector -used- see below!!!! | eBay
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US Robotics CC4336 33.6 PCMCIA Card Modem - No Cable | RecycledGoods.com
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U.S. Robotics 56K/14.4K PCMCIA V90 Xjack Connector Megahertz Modem Card with Rapidcomm SW
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NEC USR 56K X2 PC Card PCMCIA Modem with XJack XJ1560 Laptop OP-710-4016 | eBay
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Apollo FM336 33.6 PCMCIA Laptop modem (New) V.34bis 33.6K PC Card Data/Fax Modem. Comes with all accessories. For Win NT 3.x, 4.x, Win 3.x, Win 95, OSR2, and DOS major Operating Systems. -
3Com Megahertz 10/100 LAN+56K Global Modem CardBus PC Card - Walmart.com