Specifications

PRIVATE DATATAC SYSTEM FEATURES
Large System Support
R4-11-4G Wireless Data Communications Network 1-7
1.3.3.1.1 FullVision INM Controlled Redundancy
If the customer’s Private DataTAC network does not require a WNG, the
customer can use FullVision INM-controlled Radio Network Controller
(RNC) redundancy. The FullVision INM monitors two RNCs. One RNC is
active and handles messaging to and from the wireline host and mobile
computers. The other RNC is in a warm standby state, ready for the
FullVision INM to activate it if the primary RNC fails. This configuration is a
method of ensuring the data communications messaging path from the
customer wireline network to the wireless data computer.
This configuration supports only a single redundant pair of RNCs. This
configuration introduces the use of an SNMP-controlled A/B switch, which
controls the communications path between the RNCs and the associated base
stations.
1.3.3.1.2 WNG Controlled Redundancy
A Private DataTAC network using a WNG, provides for controller
redundancy for up to four pairs of RNCs in a redundant configuration. One
RNC is active and handles messaging to and from the wireline host and
mobile computers. The other RNC is in a warm standby state, ready for the
WNG to activate it if the primary RNC fails. This configuration introduces
the use of a Simple Network Management Protocol (SNMP) controlled A/B
switch, which controls the communications path between the RNCs and the
associated base stations.
1.3.3.1.3 Host Controlled Redundancy
If the Private DataTAC network does not contain a WNG or FullVision INM,
the customer’s host can control the RNC redundancy. The host monitors the
state of the active RNC and decides when to switch to a standby RNC. This
configuration supports FLM bearer services only and requires an A/B switch
at the RNC.
For more information on redundancy control, see to the Private DataTAC 1.0/
2.0 Application Design Guide, FullVision Integrated Network Manager Functional
Specification and the Wireless Network Gateway™ Product Specification.
1.3.3.2 Fault Tolerant Wireless Network Gateway
The WNG fault tolerant hardware platform combines automatic fault
recovery and intelligent configuration management to assure high
availability and data integrity in UNIX
® based applications environment
providing a broad selection of reliability and configuration alternatives. The
redundant component architecture within this gateway protects against a
single point system failure providing for very reliable messaging.
For more information, see to the Private DataTAC Network Capabilities
Specification and the Wireless Network Gateway™ Product Specification.