Multitech MT9234ZBAUSBCDC Betriebsanweisung PDF herunterladen (Seite 46)

Chapter 4 – Voice Commands

Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H) 46

+VTS Send Voice Tone(s)

Description: This command causes the modem to send DTMF digit or hookflash tones with the

duration specified by +VTD, to send DTMF digit or hookflash tone duration specified

by this command, or to send single or dual tone frequencies with duration specified

with this command.

Syntax: AT+VTS=<string>

Values: <string> The tone generation string consists of elements in a list where each

element is separated by commas. Each element can be:

1. A single character which the modem interprets as a DTMF digit (0–9,

#, *, and A–D) or hookflash (!), with a duration given by the +VTD

command.

2. A 3-element string enclosed in square brackets "[freq1,freq2,dur]",

which the modem interprets as a general dual tone and duration

(dur) selection.

3. A 2-element string enclosed in curly braces "{X,dur}", which the

modem interprets as a DTMF digit ((0–9, #, *, and A–D) or hookflash

(!), with a duration (dur) different than that given by the +VTD

command.

Missing parameters are assumed to be the default value. Unspecified

values always default to 0 for frequencies, DTMF * for DTMF tones, and

+VTD for duration. The omission of commas (and associated

subparameters) is valid.

Result Codes: OK if the PC accepts the command.

ERROR if the modem encountered an error in parsing the subparameter or if the

selected frequency is out of range.

Example: Using the +VTS command for tone generation without using any null elements:

AT=VTS=1,2,[1000,1300,50],{*6},{800,1300,50},9

The above string will perform as follows:

1. Play DTMF 1 with a duration given by the +VTD command.

2. Play DTMF 2 with a duration given by the +VTD command.

3. Play tone pair at 1000 Hz and 1300 Hz with a duration of 500 ms.

4. Play DTMF * with a duration of 60 ms.

5. Play tone pair at 800 Hz and 1300 Hz with a duration of 500 ms.

6. Play DTMF 9 with a duration given by the +VTD command.

Reports: +VTS=? Reports Frequency Support. Reports the current frequency range in the

form <freq1>,<freq2>,<dur> , where <freq1> is the first frequency range,<freq2> is

the second frequency range, and<dur> is the duration range for the square brackets

and curly braces constructs. The units are in 0.01 seconds. The range of valid <dur>

values is that of the +VTD command.

Example: In the lines below, the modem responds to the +VTS=? command by

reporting that it supports two frequencies, both in the range of 200-3300 Hz, and

supports a duration range from 0 to 5 seconds.

AT+VTS=?

(200-3300), (200-3300), (0-500)

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