Avocent CCM - Manual (Page 16)

2 CCM Installer/User Guide
User authentication and data security
The CCM user database supports up to 64 user accounts, which include usernames, passwords and/
or keys, plus specifications of access rights/levels to CCM appliance ports and commands. User
definitions may be changed at any time. You may choose to have user access authenticated locally
at the CCM user database and/or at one or more RADIUS (Remote Access Dial-In User Service)
servers. Data security may be enhanced using industry-standard SSH encryption.
Extensive command set
The CCM appliance offers a wide range of commands that allow administrators to easily configure,
control and display information about the CCM appliance operating environment, including its
ports, user accounts and active sessions. The serial CLI is always available on the unit’s console
port, and may be easily accessed during a session with an attached serial device.
The user interface also offers descriptive error message data and built-in command help
information. On-board Trivial File Transfer Protocol (TFTP) support allows administrators to
upload new functionality to CCM appliances in the field.
Port history
Each CCM port has a buffer that holds the most recent 64K bytes of online and offline serial data.
A separate history command mode lets you navigate within a port’s current history file and conduct
tailored searches.
You may also configure the appliance to write serial port data to a file on an NFS server, thus
preventing data loss due to overflow of the history buffer.
Safety Precautions
To avoid potential device problems, if the building has 3-phase AC power, ensure that a computer
and its monitor (if used) are on the same phase. For best results, they should be on the same circuit.
To avoid potentially fatal shock hazard and possible damage to equipment, please observe the
following precautions:
•
Do not use a 2-wire extension cord in any product configuration containing this appliance.
• Test AC outlets at the computer and monitor (if used) for proper polarity and grounding.
• Use only with grounded outlets at both the computer and monitor. When using a backup Unin-
terruptible Power Supply (UPS), power the computer, the monitor and the CCM appliance off
the supply.
NOTE: The AC inlet is the main disconnect.
Rack mount safety considerations
• Elevated Ambient Temperature: If installed in a closed rack assembly, the operation tempera-
ture of the rack environment may be greater than room ambient. Use care not to exceed the
rated maximum ambient temperature of the unit.