Sun Microsystems Cobalt LX50, Руководство пользователя

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Chapter 2: Installing the Server in a Rack
2-30 User Guide—Sun Cobalt LX50 Server
AC Power Connector
This connector is where you plug in the AC power cord (a power cord is supplied appropriate to your geographic
region).
Rear Panel RJ-45 Serial 2 Connector
The intended use for the RJ-45 serial port, located in the back of the system, is for remote EMP communication by
connecting the port to a serial terminal concentrator. With the optional RJ-45 to DB9 Serial Adapter Kit, the serial
port can also be configured for use with a modem. Table 4, “Replaceable Components,” on page 1-4 gives ordering
information for the adapter kit. The rear serial port is traditionally referred to as COM2 (DOS, Windows), or ttyS1
(Linux).
Serial terminal concentrators use one of two serial communication standards. Some terminal concentrators require a
Data Carrier Detect (DCD) signal, while others require a Data Set Ready (DSR) signal. The server Main Board can be
configured to support either of these configurations by setting the appropriate jumper on the jumper block, located
directly behind the RJ-45 serial connector on the Main Board.
The back RJ-45 Serial 2 port can support any standard serial device. An RJ-45 connector was selected to allow for
direct support for serial port concentrators, which typically use RJ-45 connectors and are widely used in the high-
density server market to access the server management features of the server.
To give support for either of two serial configuration standards used by serial port concentrators, the J6A2 jumper
block, located on the Main Board inside the server directly behind the rear RJ-45 serial port, must be jumpered
appropriately according to which standard is desired.
For serial devices that require a DSR signal (default), the J6A2 jumper block must be configured as follows: both
jumpers are in position 1 and 2. Pin 1 is denoted by an arrow directly next to the jumper block.
Figure 30. J6A2 Jumper Block Configured for DSR Signal (pin 7 connected to DSR)
For serial devices that require a DCD signal, the J6A2 jumper block must be configured as follows: Both jumpers are
in positions 2 and 3. Pin 1 is denoted by an arrow directly next to the jumper block. The following diagram provides
the J6A2 jumper block pinout for this configuration.
Warning: Do not attempt to modify or use the supplied AC power cord if it is not the exact
type required.
The power supply cord is the main disconnect to AC power. The socket outlet must be installed
near the equipment and readily accessible.
✍
Note: By default, as configured in the factory, the server Main Board has the back RJ-45 serial
port configured to support a DSR signal that is compatible with industry-standard serial
concentrators. To change the configuration, the J6A2 jumper block must be accessed (the top
cover must be removed to access this jumper block).
Pin
1
Pin
2
Pin
3
J6A2
J6A2 Jumper Block
(viewed from front of LX50 server)