Cisco 7000 Series Hardware Installation And Maintenance page 78

For
brief
Timing
the
to
All
serial
completely
chapter
speeds
greater than
far
commonly
is
and
can
shown
RS-232 Connections
By far
signal speeds
60-pin
known
connectors
RP also use
Console and
RP
ports
OQ
Figure
RS-449 Connections
RS-449
Mbps
to
distances
Industrys
hardware
connections
_____________
Figure
of the clockrate
descriptions
Clock in
Signals Chapter
documentation
software
related
distance limits
to
are subject
signals
For
lost
cabling
specific
The
distance and
rate limits
and distances
for
signaling
these For instance
used without
problems
any
them
for
compensate
you
do
However
here
so
at
your
most common
the
interface
64 kbps The
router
to
up
plug The
network
opposite
DB-25
commonly
that
is
as
network end
the of
at the
RS-232 however
connections
Auxiliary ports support
Console
and
refer
Auxiliary
to
RS-232 Cable Connectors
2-15 Adapter
which
balanced
supports
RS-232
version of
that
The RS-449 was
standard
resistance convert
to to
and
the of
to size
larger
fewer than
possible
possible
Cable Connectors
RS-449
2-16
Adapter
and invert-transmit-clock
command
For complete
beyond which
distance limitations
refer
these
in are the
descriptions
however
you can
usually get
maximum
recommended
the
understand the
If
you
should with
results
good
get rates
own risk
U.S
RS-232
standard the
in
FSIP
end RS-232
of
all
end
of cable
the adapter
is
RS-232
used connections
for
The
cable
adapter
system
FSIP
the
ports support
connections
only asynchronous
Equipment
Port Connection
OTE
DCE
Network End
and unbalanced RS-423
RS-422
and
functions
more
provides
RS-232
intended
to
replace
RS-449 was due
to
primarily
RS-449
the 37-pin connectors
with the smaller
25-pin
DTE
Network End
Network
Preparing
commands
refer
Configuring
to
and
instructions
descriptions
signal degrades
significantly
Distance
Limitations
in this
to
maximum
IEEE-recommended
and
distances
results
good
at speeds
V.35 Mbps but
for
rate is
electrical that
might
problems
and
distances greater than
unbalanced
supports circuits
cables
adapter is high-density
standard D-shell connector
25-pin
shows
2-15 the
Figure
Console
and
Auxiliary ports
synchronous connections
For
information
further
in this
chapter
transmissions faster
is
transmissions
over
supports
but not widely
was adopted
it
DB-25
the large base of
installed
which number
limited the
RS-232
connector
for Installation
Preparing
Connections
refer
or
is
Mbps
arise
those
at
on
the
and
the
on
the
up
greater
of
2-21