Comtech EF Data SDM-300A - Manual (Page 395)

SDM-300A Satellite Modem Revision 6
Remote Control Operation MN/SLM3650.IOM
A–3
A.3 Commands/Responses Format
The command/response portion of the message contains a variable length
character sequence which conveys command and response data.
If a satellite modem receives a message addressed to it which does
not match the established protocol or can not be implemented a negetive
acknowledgement message is sent in response. This message is:
>add/?ER1_PARITY ERROR'cr''lf']
Error message for received parity errors.
>add/?ER2_INVALID PARAMETER'cr''lf'}
Error message for a recognized command which can not be implemented or has
parameters which are out of range.
+
>add/?ER3_UNRECOGNIZABLE COMMAND'cr''lf']
Error message for unrecognizable command or bad command syntax.
>add/?ER4_MODEM IN LOCAL MODE'cr''lf']
MODEM in local error, use the REM command to go to remote mode.
>add/?ER5_HARD CODED PARAMETER'cr''lf']
Error message indicating that the parameter is hardware dependent
and may not be changed remotely.
A.4 End Character
Each message is ended with a single character which signals the end
of message. This character is:
'cr' - Carriage return character for commands.
']' - End bracket for responses.