Motorola V186 - Cell Phone - GSM System Planner Manual page 138

The schematic representation of this system is shown below. The system assumes that the
two nodes, RTU 15 and RTU 40, cannot "hear" each other. They communicate via the
FEP, which is also a Store & Forward node. This system, therefore, consists of four zones
and three nodes (RTU 15, RTU 40, and FIU). Any communication between RTUs in
different zones passes through these three nodes.
FEP
In the above situation, three nodes with their accessible (logical) links should be defined.
Using the STS site configuration, the RTUs in zone 1 should be configured to have
access
to the RADIO 1/1 link, and the RTUs in zone 2 to the RADIO 1/2 link. RTU 15 should
be configured to have access to both RADIO 1/1 and RADIO 1/3 links, while RTU 40
should be configured to have access to both RADIO 1/2 and RADIO 1/4 links.
The FEP is configured to have access to both RADIO 1/3 and RADIO 1/4 links.
Assuming that the two nodes (RTU 15 and RTU 40) can "hear" each other, the result is a
system consisting of three zones and two nodes, as shown in the following figure:
FEP
RADIO 1/3
RTU 15
RADIO 1/4
RTU 40
RTU 15
RTU 40
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ZONE 1
RADIO 1/1
ZONE 2
RADIO 1/2
RADIO 1/1
RADIO 1/2
Communications