Nrz Nrzi; Crcs - Cisco 7000 Series Hardware Installation And Maintenance

Figure
Figure
Caution
jackscrews
operating
NRZ
and NRZI Formats
All
interfaces
Both
voltage
decoded
are
the presence
no
as
values
support
environments
instructions
Checks
Redundancy
Cyclic
All
interfaces
but
also
Note
resulting display
CRC-32
use the
Release
Version
are using
16-bit
E1-G.703/G.704
2-31
with DB-15 Connectors
E1-G.7031G.704
2-32
with Twinax Connectors
of the
It is
requirement
DB-15
the
on
connector
both nonreturn
support
two
formats use
different voltage
no
with
levels signal transitions
using absolute values
of data the beginning
at
NRZI
transition
uses differential
NRZ
the factory default
NRZI
which
format
is commonly
the section
See
Configuring
CRC5
the
except E1-G.703/G.704
CRC
The
32-bit
support
HIP
To
determine
if
your
Number
indicates Part
feature the display indicates
If
CRC-32
feature
If are using
you
the
9.177 or
system
earlier
and Maintenance Release
1.2
HIP Microcode
Version
CRC
Cable
Interface for
120-Ohm
on Both Ends
Interface
Cable 120-Ohm
for
and
Cables
of the
approval
statutory
backshell
are securely
NRZ
and nonretum
zero
to
for transmission
levels
no
return
to zero voltage
NRZI
and
uses the same
of
bit interval
as signal
decode
encoding
to
signals
on interface most
all types
is
used
EIA/TIA-232
with
NRZI Format
16-bit
use
cyclic
B1-G.703/G.704
interface
CRC
will 32-bit
support
Hardware
81-0050-01
Number
Part 81-0050-02
HIP
Microcode
Version
will default
32-bit
to
9.178
or later the system
software release will cause
1.3 any
Network
Preparing
Balanced Connections
Balanced
Connections
E1-G.703/G.704
interface
down
screwed
while the FSIP
NRZI
zero inverted
to
NRZ
maintain constant
signals
bit
level during
constant but
signal levels
and
the absence
transition
rather than
determining
common
All interface types also
IBM
connections
in
in for configuration
this
chapter
CRC
check
redundancy
CRC
uses
4-bit
show command
use the
diag
Version
1.0 cannot
you
Hardware
Version 1.1 you
and Maintenance
1.2
CRC
HIP
If
are
you using
default
will
to 16-bit
the system
default
to
Preparing
Connections
the
that
is
formats
and
interval
interprets
of data
absolute
by default
the
If
use the
can
Microcode
CRC
If
you
to
2-37
for Installation