User Manual

Introduction: DataTAC network technology
RIM 801D OEM Radio Modem – Integrator’s Guide
3
DataTAC network technology
The DataTAC infrastructure has become an international data
communications standard, offering fast data transmission rates with
accurate, highly reliable message delivery. DataTAC networks are deployed
around the world from North America to Europe to Asia-Pacific.
Using an advanced Radio Data Link Access Procedure (RD-LAP) radio
channel protocol, DataTAC systems provide transmission rates up to 19.2
kb per second and 9.6 kb per second depending on the country. Those rates
mean fewer delays and faster response times for the mobile user. For
network operators, they mean greater capacity to accommodate more
customers, while minimizing the required investment in network
infrastructure.
DataTAC’s error detection and correction schemes provide increased
message accuracy, fewer message retries and enhanced networks
throughput. With DataTAC technology, the state of the entire network is
constantly monitored and safety mechanisms including system alarms,
remote diagnostics and redundant back-up links ensure network reliability
and availability.
The key components of the network infrastructure include the Network
Management Center (NMC), Area Communications Controller (ACC) and
base site equipment.
The NMC is an advanced client-server based management tool which
provides all network administration, operation and maintenance functions. It
acts as the central point of control in the DataTAC system.
The ACC consists of the Radio Network Gateway (RNG), Radio Network
Controller (RNC), and Communications Hub. The ACC is primarily
responsible for all message switching and routing functions, as well as
providing the key communication link between host computers and remote
base stations. Connectivity between the host computer and the infrastructure
is established using industry standard X.25 or TCP/IP host link protocols.
The ACC maintains all customer-specific information for each device on the
system and allows users within a given geographic area to connect to host
application services. It manages user device authorization, roaming control
and base site control. It also collects all system usage/traffic information for
accounting/billing purposes and detailed analysis of usage patterns.