IBM 887022X Maintenance Manual - Page 156

Universal, Serial, ports, cables, USB-port, connectors, Keyboard, connector, Video

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Universal Serial Bus ports The server has three Universal Serial Bus (USB) ports, which are configured automatically. USB is a serial interface standard for telephony and multimedia devices. It uses Plug and Play technology to determine the type of device attached to the connector. USB cables and hubs You need a 4-pin cable to connect devices to USB 1, USB 2, and USB 3. If you plan to attach more than three USB devices, you must use a hub to connect the devices. The hub provides multiple connectors for attaching additional external USB devices. USB technology provides up to 12 Mbps speed with a maximum of 127 external devices and a maximum signal distance of 5 meters (16 ft) per segment. USB-port connectors There are two USB-port connectors on the rear of the server and one USB-port connector on the front. These USB-port connectors are used to attach USB compatible devices to the server. The following illustration shows the pin-number assignments for the USB-port connectors on the server. 1 4 Keyboard connector There is one keyboard connector on the rear of the server. Note: If you attach a standard keyboard to the keyboard connector, the USB ports and devices will be disabled during the power-on self-test (POST). The following illustration shows the pin-number assignments for the keyboard connector on the end of the cable. 6 4 2 5 3 1 Video connector The following illustration shows the pin-number assignments for the 15-pin analog video connector on the rear of the server. 5 1 15 11 146 xSeries 445 Type 8870: Hardware Maintenance Manual and Troubleshooting Guide

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Universal
Serial
Bus
ports
The
server
has
three
Universal
Serial
Bus
(USB)
ports,
which
are
configured
automatically.
USB
is
a
serial
interface
standard
for
telephony
and
multimedia
devices.
It
uses
Plug
and
Play
technology
to
determine
the
type
of
device
attached
to
the
connector.
USB
cables
and
hubs
You
need
a
4-pin
cable
to
connect
devices
to
USB
1,
USB
2,
and
USB
3.
If
you
plan
to
attach
more
than
three
USB
devices,
you
must
use
a
hub
to
connect
the
devices.
The
hub
provides
multiple
connectors
for
attaching
additional
external
USB
devices.
USB
technology
provides
up
to
12
Mbps
speed
with
a
maximum
of
127
external
devices
and
a
maximum
signal
distance
of
5
meters
(16
ft)
per
segment.
USB-port
connectors
There
are
two
USB-port
connectors
on
the
rear
of
the
server
and
one
USB-port
connector
on
the
front.
These
USB-port
connectors
are
used
to
attach
USB
compatible
devices
to
the
server.
The
following
illustration
shows
the
pin-number
assignments
for
the
USB-port
connectors
on
the
server.
1
4
Keyboard
connector
There
is
one
keyboard
connector
on
the
rear
of
the
server.
Note:
If
you
attach
a
standard
keyboard
to
the
keyboard
connector,
the
USB
ports
and
devices
will
be
disabled
during
the
power-on
self-test
(POST).
The
following
illustration
shows
the
pin-number
assignments
for
the
keyboard
connector
on
the
end
of
the
cable.
6
4
2
1
3
5
Video
connector
The
following
illustration
shows
the
pin-number
assignments
for
the
15-pin
analog
video
connector
on
the
rear
of
the
server.
1
5
11
15
146
xSeries
445
Type
8870:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide