
Connecting to COM Port for Local Management
3-24 Installation
4.
Verify
that
a
link
exists
by
checking
that
the
port
RX
LED
is
on
(flashing
amber,
blinking
green,
or
solid
green).
5.
If
the
RX
LED
is
off,
perform
the
following
steps
until
it
is
on:
a.
Verify
that
the
device
at
the
other
end
of
the
segment
is
ON
and
connected
to
the
segment.
b. If
there
are
separate
fiber
‐
optic
connections
on
the
other
device,
check
the
crossover
of
the
cables.
Swap
the
cable
connections
if
necessary.
c.
Check
that
the
fiber
‐
optic
connection
meets
the
dB
loss
and
cable
specifications
outlined
in
the
Cabling
Guide
for
multimode
fiber
‐
optic
cabling.
To
obtain
this
document,
refer
to
“
Related
Documents
”
on
page i
‐
xvii.
6.
Repeat
steps
1
through
5,
above,
until
all
connections
have
been
made.
Connecting to COM Port for Local Management
This
section
describes
how
to
install
a
UTP
straight
‐
through
cable
with
RJ45
connectors
and
optional
adapters
to
connect
a
PC,
a
VT
series
terminal,
or
a
modem
to
an
Enterasys Networks
module
to
access
Local
Management.
This
section
also
provides
the
pinout
assignments
of
the
adapters.
What Is Needed
The
following
is
a
list
of
the
user
‐
supplied
parts
that
may
be
needed
depending
on
the
connection:
•
RJ45
‐
to
‐
DB9
female
adapter
•
UTP
straight
‐
through
cable
terminated
at
both
ends
with
RJ45
connectors
•
RJ45
‐
to
‐
DB25
female
adapter
•
RJ45
‐
to
‐
DB25
male
adapter
Note:
When installing Mini-GBICs in the front-panel ports 1 through 18, you may
need to select a group of ports to verify the port operation. Initially GROUP 1 LED is
green, indicating that the status RX/TX LEDs are showing the activity on Group 1
ports (1 through 6). To view the receive and transmit activity on another group, press
the GROUP SELECT button for less than one second (refer back to
Figure 3-7
) to
step to the next GROUP (1, 2, or 3) of 6 ports. The receive and transmit activity for
that group of segments is then indicated by the RX and TX LEDs for each segment.
Note:
If a link has not been established, refer to
Chapter 4
for LED troubleshooting
details. If the problem persists, refer to “
Getting Help
” on page xviii for details on
contacting Enterasys Networks for support.
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