Test command

The test command lists supported <n>s.

Response syntax:

+CNMA: (list of supported <n>s)
<n>
0 – The command operates in the same way as defined for the text mode.
1 – Send RP-ACK.
2 – Send RP-ERROR.

Example:

AT+CNMA=?
+CNMA: (0-2)
OK