HE863 family AT commands reference guide
80377ST10083a Rev.6 – 2012-11-12
Reproduction forbidden without written authorization from Telit Communications S.p.A.- All Rights Reserved. Page 89 of 229
+VTS - DTMF Tones Transmission
was defined through +VTD command.
<duration> - duration of a tone in 1/100 sec.; this parameter can be specified only
if the length of first parameter is just one ASCII character
0 - a single DTMF tone will be transmitted for a duration depending on the
network, no matter what the current +VTD setting is.
1..255 - a single DTMF tone will be transmitted for a time <duration> (in 10 ms
multiples), no matter what the current +VTD setting is.
Note: this commands operates in voice mode only (see +FCLASS).
Note: this command is only available during voice call
AT+VTS=?
Test command provides <dtmf> and supported <duration>s in the format:
( <dtmf>)[,(supported <duration>)]
Reference 3GPP TS 27.007 and TIA IS-101
3.5.3.6.2. Tone Duration - +VTD
+VTD - Tone Duration
AT+VTD=
<duration>
Set command sets the length of tones transmitted with +VTS command.
Parameter:
<duration> - duration of a tone
0 - the duration of every single tone is dependent on the network (factory default)
1..255 - duration of every single tone in 1/10 sec.
AT+VTD?
Read command reports the current Tone Duration, in the format:
<duration>
AT+VTD=?
Test command provides the list of supported <duration>s in the format:
(list of supported <duration>s)
Reference 3GPP TS 27.007 and TIA IS-101
3.5.3.7. Commands For GPRS
3.5.3.7.1. GPRS Mobile Station Class - +CGCLASS
+CGCLASS - GPRS mobile station class
AT+CGCLASS=
[<class>]
Set command sets the GPRS class according to <class> parameter.
Parameter:
<class> - GPRS class
“A” - WCDMA
“B” - GSM/GPRS
“CG” - class C in GPRS only mode (GPRS only)
“CC” - class C in circuit switched only mode (GSM only)
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