4/1131. INTRODUCTIONThe Nokia D211 combines GSM/HSCSD/GPRS and WLAN in one PC card /11/. It includes aGSM transceiver with built-in data capabilities, SIM card reader, antenna and PC Cardinterface in a very compact package. The functionality of the Nokia D211 can be controlledby the host unit using AT commands. The Nokia D211 can be plugged into computers orother devices having a PC card type II slot, or integrated into vertical solutions such asvending machines or security systems.With the Nokia D211 you have access to the data functionality of GSM and WLAN networks.Short message (SM), connection oriented data and facsimile services can be used. TheNokia D211 is a dual band PC card transceiver designed for operation in EGSM 900, GSM1800 and GSM900/1800 dual band networks. It supports:• High Speed Circuit Switched Data (HSCSD), which offers data rates of up to 43.2 kbit/sby using multiple receive and transmit time slots.• General Packet Radio Service (GPRS), which offers data rates of up to 64.2 kbit/s byusing multiple receive and transmit time slots.• Wireless Local Area Network (IEEE 802.11b), which offers data rates of up to 11 Mbit/sby using 2.4GHz license free ISM band.This document describes the interfaces of the Nokia D211 and the details required forimplementing a functional interface to the Nokia D211. Both hardware and software issuesare included in this document.
