Network Topologies; Point-To-Point (Ptp) - Cal Amp Phantom II Operating Manual

5.0 Network Topologies

The RADIO network topology
determines the paths available
for the movement of data.
Take this important fact into
consideration when selecting a
network topology.
© CalAmp
The Phantom II may be configured to operate in a number of
different operating modes and participate in various network
topologies.
Note: This section describes radio network topologies in general
and includes examples of corresponding Radio Configuration
settings. Refer to section 6 for further detailed information
regarding configuration options.

5.1 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 Remote. Such a
PTP network may also involve one or more Repeaters (in a store-
and-forward capacity) should the radio signal path dictate such a
requirement.
A PTP configuration may also be used in a more dynamic sense:
there may be many Remotes (and Repeaters) within such a
network, however the Master may have its 'Destination Address'
changed as and when required to communicate with a specific
remote unit.
An example of a basic PTP network consisting of two Phantom II
modems is on the next page.
As shown in Example 5.1.1:

Configuration options are based upon the chosen
Operating Mode of the unit: select the Operating Mode
first.

The DESTINATION UNIT for the MASTER is the UNIT
ADDRESS of the REMOTE, and vice versa (noting that
the MASTER's Unit Address (not visible) is preset, and
must remain as, '1').

For a PTP system, RETRANSMISSIONS on a
MASTER is not as critical a setting as it is in a Point-to-
Multipoint (PMP) system.
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