IEEE Consumer Electronics Magazine - October 2015 - 141

Insteon
RF-Only Devices

RF Insteon

n

R

F

eo
st
In

USB/RS232/Ethernet

F

In
st
eo

R

n

WWW

RF Insteon

Insteon Hub or PLM
Dual-Band Device

PL Insteon and ×10

Insteon
Dual-Band Device

PL Insteon and ×10

PL Insteon and ×10

Insteon
Dual-Band Device

Home's Electrical Wiring-Phase 1

Home's Electrical Wiring-Phase 2

Insteon
PL-Only Device

Insteon
PL-Only Device

FIGURE 1. An Insteon packet transfer diagram (courtesy of Insteon Inc.).

retransmission), RF1 to DB1 to DB2 to
RF3 (two retransmissions), and RF1 to
DB1 to RF2 to DB2 to RF3 (three retransmissions) are some examples.
On the PL, path diversity has a similar beneficial effect. For example, the
drawing shows PL device PL1B without a direct communication path to
device PL4B. In the real world, this
might occur because of signal attenuation problems or because a direct path

through the electric wiring does not
exist. But a message from PL1B will
still reach PL4B by taking a path
through DB2 (one retransmission),
through PL2B to DB2 (two retransmissions), or through PL2B to DB2 to
PL3B (three retransmissions).
Figure 2 also shows how messages
can travel among PL devices that are
installed on different phases of a home's
wiring. To accomplish phase bridging, at

least one Insteon hybrid RF/PL device
must be installed on each PL phase. In
the figure, hybrid device DB1 is
installed on phase A and DB2 is
installed on phase B. Direct RF paths
between DB1 to DB2 or indirect paths
using RF2 or RF4 (one retransmission)
allow messages to propagate between
the PL phases, even though there is no
direct electrical connection. With all
devices repeating messages, there must

october 2015

^

IEEE ConsumEr ElECtronICs magazInE

141



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