Universal Serial Bus Ports; Integrated System Management Ports - IBM eServer 342 xSeries User Reference Manual

Universal Serial Bus ports

Your 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
2. If you install a USB keyboard that has a mouse port, the USB keyboard emulates
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 device, 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 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.
The following table shows the pin-number assignments for the USB-port connectors
on the rear of your server.
Table 8. USB-port connector pin-number assignments.

Integrated System Management ports

Your server has one communication port dedicated to system management. This port
uses a standard D-shell serial-port connector, Serial C. Future releases of the
Integrated System Management (ISM) firmware code will enable the Integrated
System Management processor to send or communicate using a modem and this
dedicated serial port.
The Integrated System Management (ISM) ports (ISM-A and ISM-B) use a dual RJ-45
connector to interconnect processors of several rack-mounted servers through an
optional Remote Supervisor Adapter. The servers can communicate though half-
duplex mode. You should use ISM-B as the input connector and ISM-A as the output
connector to the next server.
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IBM xSeries 342: User's Reference
ports and devices will not be initialized during the power-on self-test (POST).
a mouse and you will not be able to disable the mouse settings in the
Configuration/Setup Utility program.
1 4
Pin
1
2
3
4
Signal
+ 5 V VCC
-Data
+Data
Ground