Point-To-Multipoint (Pmp) - Microhard Systems Nano IP Series Operating Manual

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 re-
ferred to as ‗Repeater/Remotes'.
Example 5.2.1
A 4-node network consisting of a Master, 1 Repeater, and 2 Remotes. 1 Remote is to commu-
nicate with the Master through a Repeater; the other is to communicate directly with the Master.
Refer to Section 6.1.4
for important
information regarding
the configuration of a
PMP Master's
Retransmissions.
© Microhard Systems Inc.
Image 5C: PMP Example 5.2.1: Master

There is no DESTINATION UNIT displayed as, in PMP, the DESTINATION is pre-
set to 65535: the BROADCAST address (‗multipoint').

RETRANSMISSIONS are set to 0. Refer to Section 6.1.4 for more information.

There is a REPEATER in this example network, therefore the MASTER's ‗Repeater'
configuration option is set to Yes.
CONFIDENTIAL 35