CDM-840 Remote Router MN-CDM840
Serial-based Remote Product Management Revision 3
7–7
? (ASCII Code 63)
If the Controller issues a command to set a parameter to a particular value, and the value sent is not valid, the Target then
acknowledges the message and responds with ‘?’. This indicates that there was an error in the message sent by the Controller.
For example: >0000/TFQ? (with no message arguments).
! (ASCII Code 33)
If the Controller issues a command that the Target does not recognize, the Target responds by echoing the invalid instruction code,
followed by ‘!’.
For example: >0000/ABC!
* (ASCII Code 42)
If the Controller issues a command to set a parameter to a particular value, and the value sent is valid, but the modem will not permit
that particular parameter to be changed at present, the Target responds by echoing the valid instruction code, followed by ‘*’.
For example: >0000/TFQ* (with message arguments)
# (ASCII Code 35)
If the Controller sends a correctly formatted command, but the Target is not in Remote Mode, the unit does not allow reconfiguration
and responds by echoing the valid instruction code, followed by ‘#’.
For example: >0000/TFQ#
7.2.2.6 Optional Message Arguments
Arguments are not required for all messages.
Comma ‘,’ (ASCII Code 44), period ‘.’ (ASCII Code 46), the numbers ‘0’ to ‘9’ (ASCII Codes 48 to 57), and the uppercase alphabetic
characters ‘A’ to ‘Z’ (ASCII Codes 65 to 90) may be used.
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