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Dolphin® 7900 Series User’s Guide Rev D 11 - 1
11
Wireless WAN (WWAN) Communications with GSM/GPRS
Overview
Dolphin terminals can be configured with a Siemens
®
GSM/GPRS tri-band radio module for Wireless WAN connectivity.
GSM GSM stands for Global System for Mobile communications. It is an open, non-proprietary wireless
wide area networking system that is constantly evolving and growing. One of its great strengths is
international roaming capability, which provides standardized dialing in more than 170 countries.
GPRS GPRS stands for General Packet Radio Service. It is a non-voice value added service that allows
packet switched data and information to be instantly sent and received across a network.
GSM Radio types
Dolphin 7900 terminals can support either an MC-45 or MC-46 radio.
MC-45 Radio Supports 900/1800/1900 MHz frequencies for use in Europe, Middle Eastern, and Asian countries.
Dolphin terminals with an MC-45 radio have two-way voice and data communication.
MC-46 Radio Supports 850/1800/ 1900 MHz frequencies for use in the U.S., Latin America, and Canada.
Dolphin terminals with an MC-46 radio have two-way data communication only.
Enabling the GSM/GPRS Radio Driver
When the mobile computer is first initialized, the radio driver for the GSM module is installed. Before using the radio, make sure
that the GSM radio is enabled. For more information,
see Radio Manager on page 4-5.
Tri-Band Antenna
Dolphin 7900 terminals configured with an MC-45 or MC-46 radio feature an external antenna that is optimized for power output
and receiver sensitivity.
Requirements
Using GMS/GPRS on a Dolphin terminal requires a:
• Network subscription to a GSM/GPRS network (you need to know what service providers are in your geographic area), and
• SIM card installed on the terminal (see SIM Card on page 11-2).
Capabilities
Dolphin computers with integrated GSM/GPRS MC-45 radios are optimized for the following two-way voice and data
communications:
• GSM voice data ("dial-up")
• Short Message Service (SMS) text messages
• GPRS Class 10 data transmissions average - 40-60 Kbps (The speed is dependent on the wireless network carrier.)