Input/Output Ports and Connectors
The input/output (I/O) connectors are for attaching external devices, such as printers,
keyboards, and displays, to the server.
The I/O connectors on the server include:
Serial Port: The server comes with two serial ports.
(Refer to 'Input/Output Connectors and Expansion Slots' for the
locations of the connectors.)
These ports are used to communicate with printers, plotters,
external modems, scanners, and auxiliary terminals.
You can also use these ports to transfer data between computers.
Serial ports transfer data one bit at a time, using direct memory access (DMA).
DMA is a method of transferring data between I/O devices and system memory without
intervention by the system microprocessor.
Serial ports can transfer data asynchronously, which means that they can transmit
any number of characters at any time, with no restriction on the duration of the pauses
between characters.
The serial ports can transmit and receive data and commands at rates of from 300 bits per second
up to 345600 bits per second. To use a serial port at 345600 bits per second, you need a shielded
serial cable.
Each serial port has a 9-pin, male D-shell connector on the back of the server.
The pin-number assignments of this connector conform to the industry standard.
When you turn on the server, the POST routine assigns the serial ports to specific
communication port addresses.
Some application programs use only certain ports, and some modems are designed for use
only at certain communication port addresses. You might need to use the Configuration/Setup Utility program to change
communication port address assignments to resolve conflicts.
Parallel Port
The parallel port usually is used to communicate with printers, and transfers data one byte at
a time using DMA. The parallel port has a 25-pin, female D-shell connector on the back of the server.
(Refer to 'Input/Output Connectors and Expansion Slots' for the location of the connector.)
Video Port
The I/O function card in the server has one SVGA video port.
This port is used to attach a video monitor. The video port has a 15-pin analog connector on
the back of the server.
(Refer to 'Input/Output Connectors and Expansion Slots' for the location of the connector.)
Keyboard and Auxiliary-Device Ports
The I/O function card has one keyboard port and one auxiliary-device port that supports a
mouse or other pointing device.
(Refer to 'Input/Output Connectors and Expansion Slots' for the locations of the connectors.)
UltraSCSI Ports
The server has two UltraSCSI bus-master controllers on the I/O function card, one supports internal
devices and the other is connected to an external connector for support of external devices.
Each controller supports up to 15 SCSI devices.
You can use the 68-pin, SCSI connectors for these controllers to expand the capabilities of the
server by attaching different types of SCSI devices, such as drives or printers.
(Refer to 68-pin SCSI Connector)
Universal Serial Bus Ports
The I/O board in the Netfinity 7000 M10 contains two universal serial bus (USB) ports.
Each USB port has an external connector on the rear on the server for attaching devices that
previously used serial, parallel, keyboard, mouse, and game ports.
USB is an emerging serial interface standard for telephony and multimedia devices.
USB technology uses Plug and Play to determine what device is attached to the connector.
Each USB device is accessed by a unique USB address.
A device called a hub is used to convert the USB port into multiple attachment points.
A hub has multiple ports where devices can be attached.
USB provides 12 megabits-per-second (Mbps) data transfer rate with a maximum of 63 devices and a
maximum signal distance of 5 meters (16 ft.) per data segment.
Note: If more than one USB device is to be attached, the device must be connected to a hub.
(Refer to USB Connector)
10/100 Ethernet Port
The Advanced Remote Management Controller contains a 10/100 Ethernet controller.
The Ethernet controller has an external RJ-45 connector that is used with category 3, 4, or 5 unshielded
twisted-pair (UTP) cable. The connector enables the Advanced Remote Management Controller to attach to an
Ethernet network for remote communication.
Notes:
Dual Serial Port
The Advanced Remote Management Controller contains a dual serial port.
The port has an external connector that can be used to attach to a Y-cable that is shipped with
the server.
The serial connectors on the Y-cable and the pin-number assignments are the same as for the
system serial ports. This Y-cable can be used to attach to a modem that is dedicated to communication
with the Advanced Remote Management Controller.
You can obtain a listing of compatible modems and related information by accessing the following address:
http://www.pc.ibm.com/us/compat/ on the World Wide Web.
Please see the LEGAL - Trademark notice.
RS 485 Bus Port
The Advanced Remote Management Controller contains an RS 485 port.
The port has an external connector that must be attached to an optional Y-cable that provides
for chaining other compatible System Management Adapters for remote access.
The following table shows the pin-number assignments for the connectors used by the RS 485 bus port.
Table 8. RS 485 Bus Connector Pin-Number Assignments
Pin
Signal
1
Term power
2
+ Input
3
- Input
4
+ Output
5
- Output
6
Ground
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