Connecting to the Network
3-16 Installation
Connecting UTP Cables
The
fixed
RJ45
front
panel
connections
of
the
4G4202
‐
72
and
4G4282
‐
49
are
10/100/1000
Mbps
ports.
These
ports
have
internal
crossovers,
and
also
support
automatic
‐
polarity
sensing
when
configured
for
automatic
‐
negotiation.
If
automatic
‐
negotiation
is
not
activated
on
a
port,
use
a
straight
‐
through
cable
when
connecting
a
workstation
to
the
port.
When
connecting
a
networking
device
to
the
port,
such
as
a
bridge,
repeater,
or
router,
use
a
crossover
cable.
If
a
port
is
set
for
auto
‐
negotiation,
automatic
‐
polarity
sensing
is
also
activated.
Automatic
‐
polarity
sensing
eliminates
the
need
for
a
crossover
cable,
whether
the
connection
is
to
another
network
device
or
a
workstation.
In
this
procedure,
the
4G4202
‐
72
is
used
as
the
example
to
connect
a
twisted
pair
segment
to
the
module.
It
is
also
assumed
that
the
chassis
power
is
turned
on
to
provide
power
to
the
module.
Refer
to
Figure 3
‐
8
on
page 3
‐
17
and
proceed
as
follows:
1.
Ensure
that
the
device
connected
to
the
other
end
of
the
segment
is
powered
ON.
2.
Connect
the
twisted
pair
segment
to
the
module
by
inserting
the
RJ45
connector
on
the
twisted
pair
segment
into
the
appropriate
RJ45
port
connector.
3.
Verify
that
a
link
exists
by
checking
that
the
port
RX
(Receive)
LED
is
ON
(flashing
amber,
blinking
green,
or
solid
green).
If
the
RX
LED
is
OFF
and
the
TX
(Transmit)
LED
is
not
blinking
amber,
perform
the
following
steps
until
it
is
on:
a.
To
view
the
receive
and
transmit
activity
on
a
group
of
segments,
press
the
GROUP
SELECT
button
(see
Figure 3
‐
8
on
page 3
‐
17)
to
step
to
the
group
of
interest
(Groups
1
through
3
on
the
4G4202
‐
72,
or
Groups
1
through
5
on
the
4G4282
‐
49).
Each
time
the
GROUP
SELECT
button
is
pressed,
a
GROUP
LED
lights
up
in
sequence,
indicating
which
Group
is
selected.
The
receive
and
transmit
activity
for
that
group
of
segments
is
then
indicated
by
the
RX
and
TX
LEDs
for
each
segment.
b. Verify
that
the
cabling
being
used
is
Category
5
UTP
with
an
impedance
between
85
and
111 ohms.
For
the
port
to
operate
at
100
or
1000
Mbps,
Category 5
cabling
must
be
used
and
installed
properly.
c.
Verify
that
the
device
at
the
other
end
of
the
twisted
pair
segment
is
on
and
properly
connected
to
the
segment.
d. Verify
that
the
RJ45
connectors
on
the
twisted
pair
segment
have
the
proper
pinouts
and
check
the
cable
for
continuity.
Typically,
a
crossover
cable
is
used
between
network
devices.
A
straight
‐
through
cable
is
used
to
connect
between
switches
or
hub
devices
and
an
end
system
(computer).
Refer
to
Figure 3
‐
9
and
Note:
All RJ45 front panel ports on the 4G4202-72
and
4G4282-49
support Category 5
Unshielded Twisted Pair (UTP) cabling with an impedance between 85 and 111 ohms.
Category 3 cable may be used if the connection is going to be used only for 10 Mbps.
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