Hssi Connections; Equipment Racks - Cisco 7000 Series Hardware Installation And Maintenance

For
The
following
T1E1
Broadband ISDN
Power
HSSI Connections
The
High-Speed
length
between
pairs
receptacles
cable however
SCSI-type

Equipment Racks

An
optional
rack The mounting
obstructions
supplies
mounted
the
to
dimensions
To
use the optional
The
The
but not
The
removed
after
If
clearance
16
When
Allow
can
necessary
connecting
The
be rack-mounted
overly
Consider
other
supplies
having
Further Reference
contain information
publications
ANSI
.2/92-020R2 the Draft
Customer
ATT
Margin
Analysis
Serial Interface
50
15
of for
feet
meters
HIP DSU
and
the the
is
and end
each
at
50-pin plug
HSSI
The
interface cable
HSSI
the cable
specification
cable connect the
to
kit is
rack-mounting
kit not suitable
is
such
as
power strip
In Telco environments
on
an equipment
shelf provided
and
interface
supplies
power
rack-mount
kit
rack between
width of the
rack between
of the
depth
32 inches
than
more
height of the chassis
is
approximately
The must have
rack
remove the chassis feet
installation
to
the rack has
vertical
power
remove
and
to install
inches deep
which
both of
rack
planning installation
your
of clearance
at least to feet
back
push within one foot of
it
maintenance
for
installing or replacing
network
cables
or
ports for cooling are located
air
with
or
little
rack
congested
and
the
equipment
cabling
will not obstruct
equipment
or interface
processors
disconnect cables
to unnecessarily
on
determining
American
National
Standard
Interfaces
Installation
Physical
Technical Note TN89-OO4LWP
HSSI
standard EIA/TIA
Mbps HSSI
52
connections
HSSI
meters The
feet
DTE DCE
Both and
ports
similar
to
is
SCSI-IT-type
more
stringent than
is
HSSI
interface
may
prevent
available for
the router
mounting
for use with
Telco-type
could
that
impair access
or
at installation sites that
use nonstandard
the rack dimensions
that
2-3 show
processors Figure
rack
must meet
equipment
your
two
the front
mounting
strips
and
the
front rear
mounting
19
20
inches
clearance
sufficient vertical
or other potential obstacle
strip
both interface
processors
must be
out of the chassis
pulled
straight
consider the following
behind the rack for
wall or cabinet normal
for
interface
interface
units
the front
on and
rear of the chassis
no vertical However
clearance
that is installed
already
the airflow through the chassis or impair
Route from
cables
away
to
perform equipment
and power budget
attenuation
Telecommunications
for
Layer
Specification
May 1989
maximum
612/613
specifies
The
nominal
cable
typical
interface cable
comprises
DSU
HIP
on and
the the
small computer
systems
SCSI-IT
for
that
Substituting
of the interface
proper operation
standard
in 19-inch
equipment racks or those
the interface
to
processors
racks the router can
allow safe
installation
and
the chassis footprint
the following
requirements
must be
17 3/4 inches
or rails
must be
19
at least
strips
when
1/4 inches the chassis
the chassis and
to insert
ensure allow
that will
it
and power
11 deep
inches
See
Figure
guidelines
maintenance
the rack mobile you
If
is
and
it
operation
pull
or
power
processors supplies
so multiple routers
avoid the router
placing
rack Ensure
in the
cables
that
access
to
components
field-replaceable
maintenance
or
upgrades
Preparing
Site
Requirements
entitled
cable
length
25 twisted
are
50-pin
interface
equipment
with
and power
be
and
access
outer
inches
1/4
feet are
if
required
sufficient
supplies
2-3
when
out
or
can
an
in
from
the
power
avoid
to
2-13
for Installation