Troubleshooting guide

3. Troubleshooting Functional Failures During Operation
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Table 3-4: Problems occurring during connection to the modem and action to take
3.3.2 Login from a remote terminal is not possible
If a problem occurs during connection to a remote terminal, check the status according to the
following table.
6 When the communication
speed of the communication
software is changed after
login, unexpected characters
are displayed and no
commands can be entered.
Despite changing the communication speed of the communication software after
login, correct display is not possible. Restore the original communication speed
of the communication software.
7 A user wants to use Tera
Term Pro to log in, but
unexpected characters are
displayed during login.
Negotiation with the communication software might not have been performed
correctly. See No. 3. Issue a break signal by pressing the Alt + B keys
simultaneously. Note, however, that the login page might not be displayed unless
the break signal is issued several times, depending on the communication speed
of Tera Term Pro.
8 Item names and the
corresponding content are
displayed out of alignment.
The displayed information might be greater than the maximum number of
characters that can be displayed on one line. Change the screen size setting of the
communication software to increase the number of characters that can be
displayed on one line.
No. Problem Items to check
1 The modem does not answer
automatically.
Check the following:
• The cables are connected correctly.
• The power of the modem is turned on.
• The phone number is correctly specified.
• The settings for the modem are correct.
• If the modem is connected to two terminals, a line connection can
be established by dialing.
2 Unexpected characters are displayed at
login.
Perform the following procedure:
1. Set the communication speed of the modem to 9600 bit/s.
2. If the modem supports the V.90, K56flex, x2, or later
communication standards, specify the V.34 or earlier
communication mode to connect to the line.
3 After a line disconnection, redialing
fails to connect due to a busy line.
After a line is disconnected, the modem might not answer for some
seconds. See the documentation for the modem.
4 After a line failure, the connection
cannot be re-established.
If a line is disconnected due to a line failure, it might take up to 120
seconds before you can reconnect. If you want to reconnect
immediately, log in as another user, and use the
killuser command
to forcibly log out the user connected to the AUX port with a dial-up
IP connection.
5 After a line disconnection, the
connection cannot be re-established.
If a dial-up IP connection is disconnected, it might take some time
before you can reconnect. In such case, wait 300 seconds or so before
trying to reconnect.
No. Problem Items to check