Specifications

UC864-E/G AT Commands Reference Guide

80304ST10041a Rev. 3 - 18/07/08

3.5.4.6 Voice Control

3.5.4.6.1 DTMF Tones Transmission - +VTS

+VTS - DTMF Tones Transmission

AT+VTS=

[,duration]

Execution command allows the transmission of DTMF tones.

Parameters:

<dtmfstring> - string of <dtmf>s, i.e. ASCII characters in the set (0-9),

#,*,(A-D); the string can be at most 255 <dtmf>s long; it allows the

user to send a sequence of DTMF tones, each of them with a duration

that 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).

AT+VTS=? Test command provides the list of supported <dtmf>s and the list of

supported <duration>s in the format:

(list of supported <dtmf>s)[,(list of supported <duration>s)]

Reference 3GPP TS 27.007 and TIA IS-101

3.5.4.6.2 Tone Duration - +VTD

+VTD - Tone Duration

AT+VTD=

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:

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