Intel SR870BN4 - Server Platform - 0 MB RAM Product Manual page 112

Flow control and baud rate are set for IPMI messaging (flow control is set to hardware flow
control; the baud rate is set to 19.2 kbps).
The multiplexor that determines who controls the serial connector has various default settings
enabled and disabled.
Connection Mode
The connection mode determines the protocols used when performing IPMI messaging to the BMC.
After selecting a connection mode, clicking on the Next button displays the screen for the selected
mode.
Direct Connect Mode: When Direct Connect Mode is selected, the client console and target
server are connected by a null modem cable attached between the serial ports of each system.
Modem Mode: When Modem Mode is selected, the client system establishes a connection to
the target server using a modem. Each system must have a modem attached, and the user on
the client system must have the dial string for the modem connected to the target server.
Access Mode
This option is used to configure the access mode for the Serial/Modem channel. The choices are:
Pre-boot only: The Serial/Modem channel is available only out-of-band while the machine is
powered-off and during POST until the boot process is initiated. This option is primarily used
with serial port sharing where it may be desirable to ensure that the BMC does not control the
serial port while the operating system is running. The Pre-boot only setting does not affect
Serial/Modem alerting. If alerting is enabled and software does not handle the event, the BMC
takes control of the port for the time that it takes to deliver the alert.
Always Available: The channel is dedicated to communication with the BMC and is available
during all system states (powered-down, powered-up, pre-boot, sleep, run-time, etc.).
Shared: Shared is the same as Always Available, but the BIOS leaves the serial port available
for software use.
Disabled: The channel is not allowed to communicate with the BMC except for alerting.
Privilege Level Limit
This is the maximum privilege level that users can have on this channel. It restricts users of the
channel to a set of BMC commands that can be issued at that privilege level. For example, if the
channel privilege limit is configured with a maximum privilege level of Operator, and a user is
configured to have Administrator privilege, that user can still only execute Operator level
commands over this channel. See the LAN Channel Configuration Sub-task for a description of the
privilege levels.
112 Intel® SR870BN4 Server System Product Guide