Check the listing for details. 3Com 3CXM356 Megahertz 56K WinModem PC Card. Condition: Used. Listed at 4.99 USD. This 3Com PCMCIA modem card is compatible with Type II PC Card (PCMCIA) ports and has a maximum data rate of 56 KBps. It is a great addition for those looking to enhance their laptop's connectivity capabilities. The 3CXM356 model is a reliable choice for individuals who require a high-speed modem for their internet needs. This used 3Com modem card is specifically designed for laptops and provides a stable and secure internet connection. It is perfect for those who are always on the go and need to stay connected. Whether you need to check your emails or browse the web, this 3Com modem card will provide you with the speed and reliability that you need.