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Dolphin® 7900 Series Mobile Computer User’s Guide
11 - 1
11
Wireless WAN (WWAN) Communications with GSM/GPRS
Overview
Dolphin 7900 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
4-6.
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 7900 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 7900 computers with integrated GSM/GPRS MC-45 radios are optimized for the following two-way voice and data
communications:
• GSM voice data ("dial-up") - see
Using the Dialler
on page
11-5.
• Short Message Service (SMS) text messages - see
SMS Manager
on page
11-16.
• GPRS Class 10 data transmissions average - 40-60 Kbps (The speed is dependent on the wireless network carrier.)
Summary of Contents for Dolphin 7900 Series
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