Sun Microsystems Sun Fire V445 Server Administration Manual page 111

Caution – Although access to the ALOM system controller through the network
management port is secure, access through the serial management port is not secure.
Therefore, avoid connecting a serial modem to the serial management port.
Note – The ALOM system controller serial management port (labeled SERIAL
MGT) and network management port (labeled NET MGT) are present in the Solaris
OS device tree as /dev/ttya, and in the OpenBoot configuration variables as ttya.
However, the serial management port does not function as a standard serial
connection. If you want to attach a standard serial device to the system (such as a
printer), you need to use the DB-9 connector on the system back panel, which
corresponds to /dev/ttyb in the Solaris device tree, and as ttyb in the OpenBoot
configuration variables. See
information.
The ALOM system controller card runs independently of the host server, and
operates off standby power from the server power supplies. The card features
on-board devices that interface with the server environmental monitoring subsystem
and can automatically alert administrators to system problems. Together, these
features enable the ALOM system controller card and ALOM system controller
software to serve as a lights out management tool that continues to function even
when the server OS goes offline or when the server is powered off.
The ALOM system controller card plugs in to a dedicated slot on the motherboard
and provides the following ports (as shown in
system's back panel:
Serial communication port via an RJ-45 connector (serial management port,
labeled SERIAL MGT)
10-Mbps Ethernet port via an RJ-45 twisted-pair Ethernet (TPE) connector
(network management port, labeled NET MGT) with green Link/Activity
indicator
"About the Serial Ports" on page 96
FIGURE 4-3
for more
) through an opening in the
Chapter 4 Configuring Hardware 79