Abnormal condition responses, A.2 abnormal condition responses – Comtech EF Data SNM-1010L User Manual
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SNM-1010L Data/Control Modem
Revision 0
Remote Control Channel Commands/Responses
MN/SNM1010L.OM
A.2
Abnormal Condition Responses
If a satellite modem receives a message which does not match the established protocol
or cannot be implemented, a negative acknowledgment message is sent in response. The
possible message formats are:
?ER1_PARITY ERROR'cr''lf']
(Error message for received parity errors.)
?ER2_INVALID PARAMETER'cr''lf']
(Error message for a recognized command which cannot be implemented or has
parameters which re out-of-range.)
?ER3_UNRECOGNIZABLE COMMAND'cr''lf']
(Error message for unrecognizable command or bad command syntax.)
?ER4_MODEM IN LOCAL MODE'cr''lf']
(Modem in local error, use the REM command to go to remote mode.)
?ER5_HARD CODED PARAMETER'cr''lf']
(Error message indicating that the parameter is hardware dependent and may not
be changed remotely.)
A–2