R.4.12
SEL-421 Relay Reference Manual Date Code 20111215
Communications Interfaces
Communications Card
Ethernet card, and have set the SEL-2032 Access Level 2 password to
SUB35L2, then SUB35L2 is the password for Access Level 2 on your
Ethernet card.
The Ethernet card uses access levels and passwords in two ways. First, if you
are connected to the Ethernet card user interface, the Ethernet card limits
command access based on your access level. You are connected to the
Ethernet card user interface if you are using a terminal or Telnet program and
see one of the prompts shown in Table 4.11. For example, if your Ethernet
card is installed in an SEL-2032, you can Telnet to the Ethernet card or make a
transparent connection from one of the SEL-2032 serial ports to the Ethernet
card.
Second, the Ethernet card uses access level names and passwords as user
names and passwords for protocols that require you to log in to establish a
connection. For example, if you are making an FTP connection to the Ethernet
card, you will be prompted for an FTP user name and password. In this case,
use host access levels and passwords to connect. Use the host access level for
the FTP user name and the corresponding password for the FTP password.
Access levels are listed with corresponding passwords in Table 4.12.
Connections that are closed manually by ending the network connection or by
using the Ethernet card QUIT command are terminated. This means that to
reestablish the connection and return to the original access level, you must log
in using the access level commands and passwords.
When a connection with the Ethernet card or the host “times out,” the
connection is closed and the access level is reduced to 0. There is a timeout
setting associated with connections to the Ethernet card and connections to the
host through the Ethernet card. The timeout settings and their specific
operation are described in the host-specific sections.
Access failures cause the Ethernet card to close connections, assert the alarm
bit, and prevent connections for a variable delay period.
2ACCESS
Use the 2ACCESS command to change to Access Level 2. If the current level
is not Access Level 1, the Ethernet card responds with “Invalid access level.”
When you enter the 2AC command, the Ethernet card prompts you to enter
the Access Level 2 password. If the password is Null or you enter the
password set in the host, the access level changes to Access Level 2.
Passwords are case sensitive; you must enter them exactly as set. The host
maintains the password and user list. For more details, see the host-specific
sections.
If you are unable to enter the correct password after the third failed attempt,
the Ethernet card asserts the ALARM bit in the Status register and terminates
the connection for some connection types. See the host-specific sections for
more information on how your host uses the ALARM bit from the Ethernet
card.
Table 4.12 Access Level User Names and Passwords
Access Level User Name Password
0QUINone
1 ACC User-definable
2 2AC User-definable
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