3Com Switch 7700 Configuration Manual page 23

By default, terminal service is enabled on all the user interfaces.
Note the following points:
For the sake of security, the undo shell command can only be used on the user
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interfaces other than the AUX user interface.
You cannot use this command on the user interface through which you log in.
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You must confirm your privilege before using the undo shell command in any
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legal user interface.
Configuring idle-timeout By default, idle-timeout is enabled and set to 10
minutes on all the user interfaces. The idle-timeout command is described in
Table 5.
Table 5 Idle Timeout
Operation
Configure idle-timeout
Restore the default idle-timeout
Locking the User Interface The lock command locks the current user interface
and prompts the user to enter a password. This makes it impossible for others to
operate in the interface after the user leaves. The lock command is described in
Table 6.
Table 6 Lock User Interface
Operation
Lock user interface
Setting the Screen Length If a command displays more than one screen of
information, you can use the screen length command to determine how many
lines are displayed on a screen so that information can be separated in different
screens and you can view it more conveniently. The screen-length command is
described in Table 7.
Table 7 Setting Screen Length
Operation
Set the screen length
Restore the default screen length
By default, the terminal screen length is 24 lines.
Setting the History Command Buffer Size
Table 8 describes the history-command max-size command. By default, the size
of the history command buffer is 10.
Table 8 Set the History Command Buffer Size
Operation
Set the history command buffer size
Setting Terminal Parameters
Command
idle-timeout minutes [ seconds ]
(idle-timeout 0 means disabling
idle-timeout.)
undo idle-timeout
Command
lock
Command
screen-length screen-length (screen-length
0 indicates to disable screen display separation
function.)
undo screen-length
Command
history-command max-size value
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