HP 4108GL Management And Configuration Manual page 427

I The time quota for the account has been exhausted.
The time credit for the account has expired.
I
I The access attempt is outside of the timeframe allowed for the
account.
I The allowed number of concurrent logins for the account has been
exceeded
For more help, refer to the documentation provided with your TACACS+
server application.
Unknown Users Allowed to Login to the Switch. Your TACACS+ appli-
cation may be configured to allow access to unknown users by assigning them
the privileges included in a default user profile. Refer to the documentation
provided with your TACACS+ server application.
System Allows Fewer Login Attempts than Specified in the Switch
Configuration. Your TACACS+ server application may be configured to
allow fewer login attempts than you have configured in the switch with the
aaa authentication num-attempts command.
Troubleshooting
Unusual Network Activity
18-15