Hitachi GR2000 Series - Manual (Page 171)

Troubleshooting
GR2K-GA-0015 7-5
Ver. 07-02
7.2 Problem in operation terminal
7.2.1 Cannot be properly input and display from console
When a connection failure occurs with a console, take necessary actions depending
on the symptoms as shown in Table 7-4. When you have a trouble with the modem,
take necessary actions as shown in Table 7-5 and also in the manual attached to the
modem.
Table 7-4 Symptoms and Actions Against Connection Failures with Device
Management Terminal
No. Symptom Action
1 Nothing is displayed on the
screen. Confirm with the procedure below.
1. Confirm that the status lamp of the router lights in green. See Section 7.1.2
when it does not light in green.
2. Ensure that cable is connected properly.
3. Ensure that RS232C cross cable is used.
4. Ensure that terminal software settings, such as port number, communication
speed, data length, parity bit, stop bit, and flow control are as follows:
• Communication speed: 1200, 2400, 4800, 9600, 19200bps
• Data length: 8 bits
• Parity bit: none
• Stop bit: 1 bit
• Flow control: none
2 Key input is not accepted. Confirm with the procedure below.
1. Flow control by XON/XOFF might be interrupting data transmission/receipt.
Reset the interrupt with Ctrl+Q. If key input is still disabled, confirm the
following
2. Ensure that terminal software is configured properly.
3. Ctrl+S might have suspended the screen. Press any key.
3 Abnormal characters
appear at login. Negotiation with communication software may be incorrect. Inspect the
transmission speed setting on communication software.
1. If the transmission speed for the CONSOLE(RS232C) has been set to
undefined, ensure that the transmission speed on terminal software is set to
9600 bps router command; Configuration Command (CLI type 1).
2. If the transmission speed for the CONSOLE(RS232C) has been set to 19200,
9600, 4800, 2400, or 1200 bps, ensure that the transmission speed on
terminal software is accordingly set by router command; Configuration
Command (CLI type 1).
3. If the transmission speed for the CONSOLE(RS232C) has been set to auto,
ensure that the transmission speed on terminal software is set to 19200,
9600, 4800, 2400, or 1200 bps by router command; Configuration Command
(CLI type 1). Issue a break signal from terminal software, and ensure that
login window appears. Login window may not appear until multiple break
signals are issued, depending on the transmission speed. See the manual of
terminal software for how to issue the break signal.
4. If the device management terminal is connected to the AUX port, ensure that
the transmission speed of terminal software is set to 9600 bps.
4 Abnormal characters
appear during user name
input. Transmission speed for the CONSOLE(RS232C) in the configuration information
may have been changed. See above for possible actions.
5 You cannot log in. Confirm with the procedure below.
1. If login prompt is not displayed, the router is starting. Wait a moment.
2. See if the maximum number of accounts have logged in. See Subsection
4.2.4, “Setting the number of users who can simultaneously log in" on
page 4-4 for details.