Cisco 7000 Series Hardware Installation And Maintenance page 140

NRZI Format
Configuring
The
default
support
primarily with
interface
In the
encoding
7010
interface
nrzi-encoding
AZ
disable
To
command
For
complete
Configuring 32-Bit
Cyclic
All interfaces
CRC
transmitted
ongoing
same
the
The
default
the slot
follows
7010
interface
crc 32
AZ
To
disable
and
port address
For
complete
Serial Port
Replacing Adapter
The
port adapter
of the port
cable
no
is
than
either
automatically
Although you do
speed
appropriate
DCE
clockrate
loopback
for interface
all
types
nonreturn zero inverted
to
RS-232
connections
and
the port address
slot
specify
the
example follows
that
first
terminal
configure
serial
2/0
NRZI
on
encoding port
NRZ
and
brief overview of
command
and
descriptions
CRC
Redundancy Check
use 16-bit
redundancy
cyclic
an
is
error-checking technique
CRC
data 32-bit
Because
detection with
less
error
setting
interfaces
all serial
for
and port address of interface
the
serial on
the an
port
first
terminal
configure
serial
2/0
mode
and
32-bit return
of the interface and
CRCs
overview of
brief refer
command
and
descriptions
Cables
cable connected
to
The FSIP
not configured
are
ports
attached the software
to
port
DTE DCE
or interface
from
uses clock
signal
have
not
to configure
time
the
first you configure
clock source for
the
type
and
the
interface later replace
DCE
unless
detects that
it
on
port without
test serial
NRZ
for nonreturn zero
to
is
NRZI
NRZ
most
encoding
is
IBM
environments To
in
of interface followed
the
FSIP
in IP
on
serial an
port
and
port address
the slot
specify
NRZ
NRZI
and NRZI
refer
to
the
instructions refer
to
CRC
check
default but
by
numeric
calculated
that uses
transmits
data streams
longer
retransmits
However
both
the
CRC
To
for 16-bit enable
is
command
followed by the
FSIP in
1P
slot configured
is
the default
to 16-bit
on
setting
command
use the crc32
no
Checks
Cyclic Redundancy
to
the
instructions refer to
FSIP
each port determines
DTE
for either
or
the port
identifies
as
When
cable
attached
is
the appropriate
source external
clock for the ports
source
DCE
Because
interface
port as
mode
of cable
detects
it
DCE DTE
cable with cable
cable attached This configuration
is
cable attached
port adapter
Installing
types also
format however
all
NRZI
common
encoding
NRZI
on
enable
encoding
any
command
the
by nrzi-encoding
NRZI
slot is configured for
and
the no
use
nrzi-encoding
Formats For
in
Chapter
documentation
software
related
32-bit
also
support
value detect
in
to errors
it
at faster rates provides
sender and the receiver
must
CRC
on
32-bit an interface
crc32
In example
the
CRC
for 32-bit
specify the
interface
specific
CRCs
in Chapter
documentation
software
related
interface type and
the electrical
DCE
mode When
by default
Unattached
Cable
Universal
mode
the port recognizes
the
DTE
for
or internal for
have
do define the clock
to
you
the ports automatically
clock
rate
you can
configure
FSIP
the
the will ignore
allows perform
to
you
and
IPs
Configuring
used
is
CRC
better
use
specify
that
slot
For
mode
there
rather
and
DCE
use
the
for
internal
Maintenance
5-19