Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 109 Ver. 1.00 – 10/29/2008
2.1.5.3 AT+STTONE Start or Stop Generating a Tone
(continued)
< duration > 0-15300000 in milliseconds.
When the optional duration is not present,
default value is 500ms. When the duration
is 0, it plays once. When the duration is 0,
all other tones play once except 2 => called
subscriber busy, which plays 4 times.
Reference Reference 3GPP TS 22.001 F.2.5 Comfort
tones.
Standard Scope Optional
Enfora Implementation Scope Full
Notes All tones generated by audio speaker. The
tones need to be stopped before originating
calls.
Examples
AT+STTONE=1,7,5000 Generate Call Waiting tone for 5 seconds.
AT+STTONE=0,7 Stop Call Waiting tone.