System information

4-20
AlphaServer 800 Service Guide
Table 4-2 RMC Troubleshooting (continued)
Symptom Possible Cause Suggested Solution
After the system is
powered up, the COM1
port seems to hang and
then starts working after a
few seconds.
This delay is normal
behavior due to
initialization.
Wait a few seconds for
the COM1 port to start
working.
New password and escape
sequence are forgotten.
Reset the RMC to its
factory default settings.
Refer to Section 4.3.
The remote user sees a
“+++” string on the
screen.
The modem is confirming
whether the modem has
really lost carrier. This
occurs when the modem
sees an idle time,
followed by a “3,”
followed by a carriage
return, with no subsequent
traffic. If the modem is
still connected, it will
remain so.
This is normal behavior.
The message “unknown
command” is displayed
when the user enters a
carriage return be itself.
The terminal or terminal
emulator is including a
line feed character with
the carriage return.
Change the terminal or
terminal emulator setting
so that “new line” is not
selected.
Cannot enable modem or
modem will not answer.
The modem is not
configured correctly to
work with the RMC.
Modify the modem
initialization string
according to your modem
documentation.