© Microhard Systems Inc. CONFIDENTIAL 32
IP9xx Series
5.0 Network Topologies
5.2 Point-to-Multipoint (PMP)
In a Point-to-Multipoint network, a path is created to transfer data
between the Master modem and numerous remote modems. The
remote modems may simply be Remotes with which the Master
communicates directly, and/or Remotes which communicate via
Repeaters. Some or all of the Repeaters may also act as Remotes
in this type of Network, i.e. the Repeaters are not only storing and
forwarding data, but are also acting as Remotes. Such Repeaters
may be referred to as ‗Repeater/Remotes‘.
Example 5.2.1
A 4-node network consisting of a Master, 1 Repeater, and 2 Re-
motes. 1 Remote is to communicate with the Master through a Re-
peater; the other is to communicate directly with the Master.
There is no DESTINATION UNIT displayed as, in PMP,
the DESTINATION is preset to 65535: the BROAD-
CAST address (‗multipoint‘).
RETRANSMISSIONS are set to 0. Refer to Section
6.1.4 for more information.
There is a REPEATER in this example network, there-
fore the MASTER‘s ‗Repeater‘ configuration option is
set to Yes.
Image 5C: PMP Example 5.2.1: Master
Refer to Section 6.1.4 for
im port a n t inform ation
regarding the configuration of
a P M P M a s t e r ‘ s
Retransmissions.
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