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Chapter 4: Network Topologies
4. Network Topologies
The MDR100A-R5 or MDR112A-R5 may be configured to operate in a number of different operating modes and participate in
various network topologies.
NOTE: This section describes network topologies and also contains details about related factory default settings to enable the
reader to readily see the correlation between various registers. Refer to Chapter 5 for detailed information about
configuration options and details.
For convenience, a number of factory default configurations related both to operating modes and network topologies are
available. Configuring modems using factory default settings has the following benefits:
• Hastens the configuration process.
Load default and if necessary, apply only minor settings adjustments.
• Aids in troubleshooting.
if settings have been adjusted and basic communications cannot be established, simply revert to the applicable factory default
setting and any improper adjustments will be overwritten and a “fresh start” can be made with known-to-work settings.
Settings (S) register S133 configures the modem for the “Network Type” within which it will be participating.
4.1 Point-to-Point (PTP)
In a point-to-point network, a path is created to transfer data between Point A and Point B, where Point A may be considered the
Master modem and Point B a Slave. Such a PTP network may also involve one or more Repeaters (in a store-and-forward capacity)
if the radio signal path dictates this requirement.
A PTP configuration may also be used in a more dynamic sense: there may be many Slaves (and Repeaters) within the networ;
however, the Master may have its “Destination Address” (S140) changed if and when required to communicate with a specific
Slave.
PTP factory default settings:
Master &F6
Slave &F7
slow mode (optional) :
Master &F8
Slave &F9
