IBM 8668 Hardware Maintenance Manual - Page 95

System management ports, Universal Serial Bus ports, Notes, USB cables and hubs

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The following table shows the pin-number assignments for the 15-pin analog video connector on the rear of your server. 5 1 15 11 Table 3. Video-port connector pin-number assignments Pin Signal Pin Signal Pin 1 Red 6 Ground 11 2 Green or monochrome 7 Ground 12 3 Blue 8 Ground 13 4 Not connected 5 Ground 9 +5 V dc 14 DDC 10 Ground 15 Signal Not connected DDC SDA Horizontal synchronization (Hsync) Vertical synchronization (Vsync) DDC SCL System management ports The integrated system management (ISM) ports (ISM-A and ISM-B) use a dual RJ-45 connector to interconnect ISM processors of several servers through an optional Remote Supervisor Adapter. Note: ISM ports (ISM A and B) are used for the RS-485 interconnect network communications. Refer to the Remote Supervisor Adapter option documentation for detailed information about the ASM interconnect network. Universal Serial Bus ports Your server has two Universal Serial Bus (USB) ports, which are configured automatically. USB is an emerging serial interface standard for telephony and multimedia devices. It uses Plug and Play technology to determine the type of device attached to the connector. Notes: 1. If you attach a standard (non-USB) keyboard to the keyboard connector, the USB ports and devices will be disabled during the power-on self-test (POST). 2. If you install a USB keyboard that has a mouse port, the USB keyboard emulates a mouse and you will not be able to disable the mouse settings in the Configuration/Setup Utility program. USB cables and hubs: You need a 4-pin cable to connect devices to USB 1 or USB 2. If you plan to attach more than two 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. Installing options 87

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The following table shows the pin-number assignments for the 15-pin analog video
connector on the rear of your server.
1
5
11
15
Table 3. Video-port connector pin-number assignments
Pin
Signal
Pin
Signal
Pin
Signal
1
Red
6
Ground
11
Not connected
2
Green or monochrome
7
Ground
12
DDC SDA
3
Blue
8
Ground
13
Horizontal synchronization
(Hsync)
4
Not connected
9
+5 V dc
DDC
14
Vertical synchronization
(Vsync)
5
Ground
10
Ground
15
DDC SCL
System management ports
The integrated system management (ISM) ports (ISM-A and ISM-B) use a dual
RJ-45 connector to interconnect ISM processors of several servers through an
optional Remote Supervisor Adapter.
Note:
ISM ports (ISM A and B) are used for the RS-485 interconnect network
communications.
Refer to the Remote Supervisor Adapter option documentation for detailed
information about the ASM interconnect network.
Universal Serial Bus ports
Your server has two Universal Serial Bus (USB) ports, which are configured
automatically. USB is an emerging serial interface standard for telephony and
multimedia devices. It uses Plug and Play technology to determine the type of
device attached to the connector.
Notes:
1.
If you attach a standard (non-USB) keyboard to the keyboard connector, the
USB ports and devices will be disabled during the power-on self-test (POST).
2.
If you install a USB keyboard that has a mouse port, the USB keyboard
emulates a mouse and you will not be able to disable the mouse settings in the
Configuration/Setup Utility program.
USB cables and hubs:
You need a 4-pin cable to connect devices to USB 1 or USB
2. If you plan to attach more than two 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.
Installing options
87