Network-Wide Diagnostics; Redundant Versus Non-Redundant Operation - GE MDS 4790 Series Installation & Operation Manual

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All assemblies, including the duplexer and power supply, are contained
in the radio's compact (2RU high) enclosure. The radio's compact size
allows it to fit into most existing systems, in either tabletop or rack
mounted configurations. Connectors are provided on the rear panel for
easy connection of power, antenna, data, alarm, and diagnostic func-
tions.

2.1 Network-Wide Diagnostics

Newer GE MDS remote and master station radios, including the
MDS 4790/9790 Series, offer network-wide diagnostics capability. Net-
work-wide diagnostics communications is a modern, packetized mode
that has several advantages over DTMF diagnostics communications
(used by older GE MDS radios):
• You can gather diagnostic data over a large radio network with-
out disrupting the system communications flow.
• When required, you can increase diagnostics communications
speed by actively collecting diagnostic data.
• You can access diagnostic data for each radio in the network
from any radio diagnostics port in the network.
• You can broadcast certain messages to all radios in the system
simultaneously.
You can use the MDS 4790/9790 Series Master Station to poll remote
radios in its radio system for diagnostic data. For more information on
the implementation of network-wide diagnostics, refer to the GE MDS
Network-wide Diagnostics Handbook (P/N 05-3467A01).

2.2 Redundant versus Non-redundant Operation

A redundant configuration means that the master station has two com-
plete transceiver boards and power supplies installed in the enclosure. In
the event of a failure in the primary equipment, the controlling logic
switches to the stand-by unit. The stand-by transceiver board is con-
stantly operating and its operational readiness is monitored. However,
the power amplifier in the stand-by board is not operating when it is in
stand-by mode.
In a non-redundant configuration, there is only one transceiver board
installed in the "A" slot of the enclosure, and back-up transceiver board
operation is not possible.
Transceiver boards may be moved from one master station to another,
or an additional transceiver board may be added to a non-redundant
master station. You do not need to specify redundant or non-redundant
operation, or select the active transceiver board. Installing or replacing
MDS 4790/9790 Series I/O Guide MDS 05-3438A01, Rev. F