User's Manual

Network SupportChapter —4
110 700 Series Color Mobile Computer User’s Manual
WWAN Radio Options
The 700 Series Computer can integrate either the GSM/GPRS or the
CDMA/1xRTT radio along with the 802.11b radio and the Wireless
Printing option. The WWAN radio option accommodates any Wireless
WAN requirements, such as taking the 700 Series Computer off the prem-
ises in a delivery vehicle to cover a much larger area.
GSM/GPRS
The GSM (Global System for Mobile communications) and GPRS (Gen-
eral Packet Radio Service) wireless infrastructure increases voice capacity,
enables personalized “user-aware” services, and creates networking efficien-
cies to help wireless service providers drive reduced operating costs.
S GSM is an open, nonproprietary system. One of its great strengths is
the international roaming capability. This provides seamless and s ame-
standardized same-number contactability world-wide. GSM satellite
roaming has extended service access to areas with unavailable terrestrial
coverage.
S GPRS is the high-speed data evolution of GSM. GPRS supports Inter-
net Protocol (IP), enabling access to Internet and intranet content and
applications from GPRS wireless devices. The anticipated data rate for
GPRS is 115 Kbps and throughput rates of 30-60 Kbps have been
achieved initially. This high speed capability enables vehicle applications
to become real-time and to use the Internet for access to corporate data
or information in the form of traffic or navigation.
CDMA/1xRTT SB555
Code Division Multiple Access (CDMA) is a form of “spread-spectrum,” a
family of digital communication techniques used in military applications
for years. The core principle of spread-spectrum is the use of noise-like
carrier waves, and, as the name implies, bandwidths much wider than that
required for simple point-to-point communication at the same data rate.
S 1XRTT, the first phase of CDMA2000, is designed to support up to
144 KB per s econd packet data transmission and to double the voice
capacity of current generation CDMA networks.
S SB555 Embedded Module, from Sierra Wireless, provides complete
wireless functionality and integrates easily into the most compact and
slender mobile applications with its small flexible design. The SB555
offers maximum coverage and access to entire CDMA networks.