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Serial
connectors
There
are
two
serial
connectors
on
the
rear
of
the
computer.
Use
these
connectors
to
connect
serial
devices.
The
following
illustration
shows
a
serial
connector.
1
5
6
9
Ultra320
SCSI
connector
Your
computer
has
an
integrated
SCSI
controller.
This
single-channel
controller
supports
an
independent,
Ultra320
SCSI
channel
that
supports
up
to
15
SCSI
devices.
The
SCSI
connector
for
the
channel
is
on
the
system
board.
The
controller
has
the
following
features:
v
Double-transition
clocking
to
achieve
up
to
320
MBps
(mgegbytes
per
second)
data-transfer
rates
v
Domain
name
validation
to
negotiate
compatible
data-transfer
speeds
with
each
device
v
Cyclic-redundancy
checking
(CRC)
to
improve
data
reliability
v
An
active
terminator
for
SCSI
bus
termination
SCSI
cabling
requirements
You
can
install
four
internal
SCSI
devices
using
the
SCSI
signal
cable
that
comes
with
some
computer
models.
If
you
plan
to
attach
external
SCSI
devices,
you
must
order
an
optional
PCI
SCSI
adapter
and
external
cable.
To
select
and
order
the
correct
cables
for
use
with
external
devices,
contact
your
IBM
marketing
representative
or
authorized
reseller.
To
receive
an
indication
of
SCSI
hard-disk
drive
activity,
you
must
also
connect
the
SCSI
adapter
to
the
SCSI
LED
connector
on
the
system
board.
See
“System-board
internal
connectors”
on
page
52
for
the
locations
of
the
SCSI
connectors.
Setting
SCSI
IDs
Each
SCSI
device
that
is
connected
to
a
SCSI
controller
must
have
a
unique
SCSI
ID.
This
ID
enables
the
SCSI
controller
to
identify
the
device
and
ensure
that
different
devices
on
the
same
SCSI
channel
do
not
attempt
to
transfer
data
simultaneously.
SCSI
devices
that
are
connected
to
different
SCSI
channels
can
have
duplicate
SCSI
IDs.
See
the
information
that
comes
with
the
device
for
instructions
for
setting
its
SCSI
ID.
Universal
Serial
Bus
connectors
There
are
six
Universal
Serial
Bus
(USB)
2.0
connectors,
two
on
the
front
and
four
on
the
rear
of
the
computer.
Use
the
USB
connectors
to
connect
optional
telephony
and
multimedia
devices.
USB
2.0
technology
transfers
data
at
up
to
480
Mb
per
second
(Mbps)
with
a
maximum
of
127
external
devices
and
a
maximum
signal
distance
of
5
meters
(16
ft)
per
segment
(if
the
device
that
is
attached
to
the
computer
is
a
USB
2.0
device).
If
multiple
USB
devices
are
attached
to
the
computer,
the
USB
hub
must
be
USB
2.0;
otherwise,
all
USB
2.0
devices
will
transfer
data
at
12
Mbps.
Using
Plug
and
Play
technology,
USB
devices
are
configured
automatically.
The
following
illustration
shows
a
USB
connector.
1
4
Use
a
4-pin
USB
cable
to
connect
an
external
devices
to
a
USB
connector.
Chapter
4.
Installing
options
73
Содержание IntelliStation M Pro 6230
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