Doc
No.
FM5640
issue
3
Page
6
5.
DECT
OVERVIEW
The
maximum
theoretical
range
for
any
DECT
system
is
500
metres
under
ideal
conditions,
in
practice
the
range
will
rarely
exceed
300
metres
due
to
reflections
from
nearby
buildings,
trees,
water,
etc.
Obstructions
inside
buildings
such
as
walls
and
floors
will
reduce
the
range,
some
construction
materials
such
as
foil
backed
plasterboard,
reinforced
concrete
or
stone
walls
will
reduce
range
further.
Environmental
conditions
such
as
high
levels
of
transmission
at
nearby
frequencies
or
emissions
from
other
electrical
equipment
may
also
reduce
range.
Clear
line
‐
of
‐
sight
will
give
maximum
radio
coverage,
it
is
impossible
to
state
a
specific
indoor
range
in
advance
of
a
site
survey;
however,
as
a
guide
you
can
usually
achieve
50
metres
radius
from
the
Server/Base
Station
or
Repeater.
Locating
the
Server/Base
Station
as
high
and
free
from
immediate
obstruction
as
possible
will
help
to
maximise
its
range.
Even
if
the
Server/Base
Station
is
placed
in
the
optimum
position
it
may
not
always
achieve
coverage
in
the
most
remote
corners,
if
this
is
the
case
then
additional
Repeaters
will
be
required.
Repeaters
are
generally
placed
in
a
star
configuration
around
the
Server/Base
station;
however,
it
is
possible
to
extend
the
coverage
in
one
direction
with
up
to
3
repeater
jumps.
A
site
survey
will
be
required
to
establish
the
best
DECT
system
and
Base/Repeater
configuration
required.
The
Server,
Base
Stations
and
Repeaters
should
always
be
located
at
least
5
metres
away
from
the
Nursecall
Panels,
RFE’s
or
any
other
electrical
equipment
to
avoid
the
risk
of
interference.
All
DECT
products
must
be
sited
in
a
dry
secure
area;
they
are
NOT
suitable
for
outdoor
locations.
AVOID LOCATING DECT PRODUCTS…
WITHIN
5
METRES
OF
OTHER
ELECTRONIC
EQUIPMENT
DIRECTLY
ABOVE
A
HEATER
IN
DIRECT
SUNLIGHT
NEAR
TO
SPLASHING
WATER
IMPORTANT NOTE:
Care
must
be
taken
during
installation
and
commissioning
of
any
DECT
system
to
ensure
full
radio
coverage
and
correct
Radio
Part
Numbering
of
Base
Stations
and
Repeaters.
Failure
to
follow
the
Manufacturer’s
installation
and
programming
instructions
may
result
in
blind
spots
or
calls
dropping
‐
out
when
moving
between
radio
cells.
Always
perform
several
test
calls
in
all
extremes
of
the
building
with
all
DECT
handsets
in
use,
i.e.
simultaneous
phone
‐
phone
calls.
ENTS
