Specifications

PRIVATE DATATAC SYSTEM FEATURES
Data Messaging Services
R4-11-4G Wireless Data Communications Network 1-3
1.3 Private DataTAC System Features
The Private DataTAC network features provide or enhance wireless
computer access to host computer networks. This section covers the
following:
• Data Messaging Services
— Bearer Services
— Host Connectivity
• Network Management
— RD-LAP Protocol Rate Agility
• Large System Support
— Controller Redundancy
— Fault Tolerant Wireless Network Gateway
— Mobility Management
• Security Services
— User Authentication
— Data Encryption
— Encryption Key Management
1.3.1 Data Messaging Services
Private DataTAC 2.0.3 provides data communication services by using land
mobile radio frequency pairs called radio channels. These radio channels
operate in duplex mode. One frequency transmits and the other receives at a
given radio end point. Radio channels provide the wireless link over which
user information is passed. Data messaging services include the following:
• Bearer Services
• Host Connectivity
1.3.1.1 Bearer Services
Private DataTAC networks enable wireless computers to use both Formatted
Logical Messaging (FLM) and Internet Protocol (IP) bearer service
communication sessions operating on the same computing device. The
network does so by using both the WNG and MWCS II.
1.3.1.1.1 FLM Bearer Service
FLM bearer service is the message transport associated with a Motorola
proprietary FLM host connection protocol for wireline, fixed-end host
applications to communicate through the Private DataTAC network. It also
defines the various methods for field applications to communicate through a
Private DataTAC network.