Microhard Systems IP-921, Operating Manual

Page: 30 / 173

© Microhard Systems Inc. CONFIDENTIAL 30
IP9xx Series
5.0 Network Topologies
The RADIO network topology
d e t e r m i n e s
t h e p a t h s
available for the movement of
data.
Take this important fact into
consideration when selecting
a network topology.
The IP Series 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 set-
tings. 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 be-
tween 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 capac-
ity) should the radio signal path dictate such a requirement. (Note
that a Repeater may also concurrently function as a Remote, i.e. it
may pass data to and from an attached device(s).)
A PTP configuration may also be used in a more dynamic sense:
there may be many Remotes (and Repeaters) within such a net-
work, however the Master may have its ‗Destination Address‘
changed as and when required to communicate with a specific re-
mote unit.
An example of a basic PTP network consisting of two IP Series is
on the next page.
Notes re Example 5.1.1:

Configuration options are based upon the chosen Op-
erating 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 MAS-
TER is not as critical a setting as it is in a Point-to-
Multipoint (PMP) system.