GSMGSM (Global System for Mobile communication) is a digital mobile telephony system that is widely used in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies (TDMA, GSM, and CDMA). GSM digitizes and compresses data, then sends it down a channel with two other streams of user data, each in its own time slot. It operates at either the 900 MHz or 1800 MHz frequency band.
GSM, GPRS, EDGE
PCMCIAShort for Personal Computer Memory Card International Association, and pronounced as separate letters, PCMCIA is an organization consisting of some 500 companies that has developed a standard for small, credit card-sized devices, called PC Cards. Originally designed for adding memory to portable computers, the PCMCIA standard has been expanded several times and is now suitable for many types of devices. There are in fact three types of PCMCIA cards.
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Type: GSM; Supported Standards: GSM, GPRS, EDGE, 3G, HSDPA, HSPA +; Placement: external; Interface: USB; Power over USB: Yes; Dimensions (WxHxD): 89 x 12 x 45 mm; Weight: 45 g; Additional information: to receive data - 28.8 Mb/s., transmission - 5.7 Mbit/s., connector for external antenna, memory ex...
Type: CDMA; Supported Standards: CDMA, EV-DO Rev A; Placement: external; Interface: USB; Power over USB: Yes; Dimensions (WxHxD): 77 x 16 x 36 mm; Weight: 42 g;...