Hand Held Products 7900 - Manual (Page 137)

Dolphin® 7900 User’s Guide Rev F
10/16/07
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Wireless WAN (WWAN) Communications with GSM/GPRS
Overview
Dolphin terminals can be configured with a Siemens ® GSM/GPRS quad-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.
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 7-8.
GSM Radios
Dolphin 7900 terminals can support an MC-45, MC-46, or MC-75 radio.
MC-45 Radio Supports 900/1800/1900 MHz frequencies for use in Europe, Middle East, Asia and Australia.
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., Canada, and Latin America.
Dolphin terminals with an MC-46 radio have two-way data communication only.
MC-75 Radio Supports 850/900/1800/1900 MHz frequencies for use in the U.S., Canada, Latin America, Europe,
Middle East, Asia, and Australia.
Dolphin terminals with an MC-75 radio have two-way voice and data communication .
Dual-Band Antenna
Dolphin terminals configured with a GSM radio feature 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.
This antenna is color-coded with a white O-ring on
the inside of the antenna.
North America Supports 850 MHz and 1900 MHz bands.
This antenna is color-coded with a green O-ring on
the inside of the antenna.
Requirements
Using GSM/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 10-2) .
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.)
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