Test command

Response syntax:

+CNMA: (list of supported <n>s)

The test command parameter and its defined values are the following:

<n>

0 – The command operates in the same way as defined for the text mode

1 – Send RP-ACK

2 – Send RP-ERROR

The following command example lists the supported delivery statuses:

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