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The interface between the AirPort Card wireless LAN module and the KeyLargo IC is a subset of the PCMCIA interface.
The AirPort Card contains a media access controller (MAC), a digital signal processor (DSP), and a radio-frequency (RF) section. The card has a connector for the cable to the antennas, which are built into the computer's enclosure .
The design of the AirPort Card is based on the IEEE 802.11 standard. The card transmits and receives data at up to 11 Mbps and is compatible with older systems that operate at 1 or 2 Mbps. For information about its operation, see AirPort Card Wireless LAN Module.