ZyXEL Communications 2864 Series, User Manual, Page: 195 / 267

16–19
• AT+V TD ?
The DCE returns the current beep duration and pause interval setting followed by
the
OK
result code.
• AT+V TD =?
The DCE returns the permitted values for the beep duration and pause interval.
The response is:
(0-255), (0-255)
OK
• AT+V DD =<
dds
>,<
ddi
>
This command causes the DCE to set the DTMF detection threshold and the re-
quired period of continuous DTMF tone detection before the DCE can report a
DTMF event.
<dds> : The DCE uses this subparameter to select the sensitivity threshold
level of DTMF detection; a lower value of this subparameter implies
that the DTE wants the DCE to detect the DTMF tone more
sensitively. The range of the threshold <
dds
> is from 0 to 15. A
value of zero disables the DTMF detection. The default value is 5.
<ddi> : The required period of continuous DTMF tone detection before the
DCE can report a DTMF event. A value of zero disables the DTMF
detection. The range of the interval <
ddi
> is from 0 to 255 in units
of 5 ms. The default value is 8 (40 ms).
The DCE returns the
OK
result code if the DCE accepts this command, or it re-
turns the
ERROR
result code if any of the <
dds
> or <
ddi
> values is out of range.
• AT+V DD ?
This command causes the DCE to report the current <
dds
> and <
ddi
> settings.
The format of the response is:
<dds>,<ddi>
OK
• AT+V DD =?
This command causes the DCE to report the permitted range of <
dds
> and
<
ddi
>. The response is:
(0-15),(0-255)
OK
• AT+V SY =<
timer
>
This command sets the DCE's voice recording resync timer. The range of <timer> is
from 0 to 255 in 50ms units. The default value is 0 (disable). A value of 0 disables re-
sync generation. In Voice Receival Mode, the speech coder is reset and generates a resync
symbol - <DLE><DC2> in the voice data according to this timer interval.