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Working with GSM
Overview
The Dolphin 9900 terminal can be configured with an integrated, embedded GSM/GPRS quad-band radio
module for WWAN communication.
Note: The 9950 and 9951 are not available with GSM.
Requirements
Using GSM/GPRS requires a:
• Network subscription to a GSM/GPRS network (you need to know what service providers are in your
geographic area), and
• An installed SIM card that has been activated by the network service provider (see SIM Card
Installation on page 8-2).
Quad Band Antenna
The GSM radio features an external antenna that is optimized for power output and receiver sensitivity.
This is an omni-directional antenna with zero dBm gain.
For the MC-75 radio, there are two different antennas based on geographical location; each supports two
bandwidths:
Europe: Supports 900 MHz and 1800 MHz bands.
North America: Supports 850 MHz and 1900 MHz bands.
Signal Strength
The signal strength of the GSM connection is indicated by the number of bars that appear in the signal
strength icon in the Navigation bar at the top of the window.
GSM Short for Global System for Mobile communications, GSM is an open, non-proprietary wireless
WAN system that is constantly evolving and growing.
GPRS Short for General Packet Radio Service, GPRS is a non-voice value added service that allows
packet-switched data to be instantly sent and received across mobile telephone networks.
Icon Indicates…
The signal strength of the radio connection.
The signal strength of the phone (voice) connection; see page 8-5.
The signal strength of the data connection; see page 8-8.