AT Commands Reference
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AT+CRTT?
+CRTT: 4 //Ring type number 4 (Bravo)
AT+CRTT=5,4 //Invalid operation
+CME ERROR: <err>
4.8.1.2 S94, Sidetone Effect
This command is used for g18 compatibility. This command reduces the microphone audio input that is routed to the selected
speaker, so that people speaking will hear themselves talking. Refer to “+MAFEAT, Features Selection” on page 167.
Set Command
The Set command sets the sidetone status.
Read Command
The Read command returns the sidetone status.
Test Command
Command Response/Action
ATS94=<n> OK
or:
+CME ERROR: <err>
Command Response/Action
ATS94? <000-disabled, 001-enabled>
OK
or:
+CME ERROR: <err>
Command Response/Action
ATS94=? +CME ERROR: <err>