Network
Connection
Considerations
Serial
Connections
Back
Front
The
serial
interface
ports are located
on
the
rear
of
the
router
See
Figure
2-4
Figure
2-5
Figure
2-6
and
Figure
2-7
The
serial
ports
are
50-pin
D-type
subconnectors
The
router
is
available
as
DTE
only
except
models 3104 and 3204
On
models 3104 and
3204
the
serial
ports can
be configured
as
DTE
or
DCE
depending
on
the
special
serial
cable being
used
DTE
serial
ports
require
that
clocking
be
provided
by
CSU/DSU
or
modem
If
the
systems
serial
port
is
labeled with
V2
then
for
optimum performance
use the version of
the
cable with
the
part
number
ending
in
-02
for
example
72-0740-02
DCE
or
72-0671-02
DTE
You must
use
special
serial
cable
to
connect
the router
to
modem
or
CSU/DSU
as
shown
in
Figure
2-12
This cable
is
available
from
us and
is
usually ordered
with
the
system
See
Appendix
for
cable
specifications
For ordering information
contact
your
sales
representative
Figure
2-12
Serial
Cable Connections
Token
Ring
lobe
cable
not included
Standard
IEEE.802.5
connector
Media
attachment
unit
MAU
9-pin
connector
Router
top view
Figure
2-11
Token
Ring
Cable Connections
Serial port
50-pin
connector
Router
RS-232
RS-449V.35
X.21
or
EIA-530 connector
Modem
or
CSU/DSU
Preparing
for Installation
2-13
Содержание 3000 Series
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