Investing Internet Technology Windows Internet Tech. However, its communications and networking hardware is still renowned as being among the best. Megahertz PC combo cards come in a variety of flavors. The global feature allows the modem to be used with phone jacks and systems all around the world, whereas the non-global version is specific to the country where it is sold. Card to Cable Interface Mainstream notebook modem and LAN cards come standard with a dongle interface to connect to phone lines or Ethernet cables to the PC card.
Dongles are external boxes which connect through a small port in the side of the PC card.
However, there are also other proprietary interfaces. Xjack is one specific to 3Com products. Instead of a standard dongle, a small jack pops out of the side of the PC card for cables to be plugged in, without an external connector. The advantage of cardbus is that it requires lower CPU utilization, and has a much higher potential transfer rate with its wider data bus. It is a global access, dongle interface, non-cardbus interface version of the 3Com MegaHertz.