IBM 8669 Hardware Maintenance Manual - Page 80

Universal Serial Bus ports, USB cables and hubs, USB-port connectors

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pin-number assignments conform to the industry standard. 1 5 6 9 Pin Signal 1 Data carrier detect 2 Receive data 3 Transmit data 4 Data terminal ready 5 Signal ground Pin Signal 6 Data set ready 7 Request to send 8 Clear to send 9 Ring indicator Universal Serial Bus ports The server has two Universal Serial Bus (USB) ports, which configure 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 12 megabits-per-second (Mbps) speed with a maximum of 127 external devices and a maximum signal distance of five meters (16 ft.) per segment. USB-port connectors: Each USB port has an external connector on the rear of the server for attaching USB compatible devices. 1 4 The following table shows the pin-number assignments for the USB-port connectors on the rear of the server. Table 3. USB-port connector pin-number assignments Pin Signal 1 VCC + 5 V VCC 2 -Data 3 +Data 4 Ground 70 Hardware Maintenance Manual: xSeries 342 Type 8669

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pin-number assignments conform to the industry standard.
1
5
6
9
Pin
Signal
Pin
Signal
1
Data carrier detect
6
Data set ready
2
Receive data
7
Request to send
3
Transmit data
8
Clear to send
4
Data terminal ready
9
Ring indicator
5
Signal ground
Universal Serial Bus ports
The server has two Universal Serial Bus (USB) ports, which configure 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 12 megabits-per-second (Mbps) speed with a maximum
of 127 external devices and a maximum signal distance of five meters (16 ft.) per
segment.
USB-port connectors:
Each USB port has an external connector on the rear of
the server for attaching USB compatible devices.
1
4
The following table shows the pin-number assignments for the USB-port connectors
on the rear of the server.
Table 3. USB-port connector pin-number assignments
Pin
Signal
1
VCC + 5 V VCC
2
-Data
3
+Data
4
Ground
70
Hardware Maintenance Manual: xSeries 342 Type 8669