4-20 DS10 Console Reference
Table 4–5 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. Wait a few seconds for
the COM1 port to start
working.
New password and escape sequence are forgotten.
RMC console must be
reset to factory defaults.
See Section 4.12.
The remote user sees a “+++” string on the screen.
The modem is confirming
whether the modem has really
lost carrier
This is normal
behavior.
The message “unknown command” is displayed when the user enters a
carriage return by 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.
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