Intel MD566X manual Dtmf and Tone Generation, AT+VTS=DTMF or

56K V.92 Data, Fax, and Voice Chipset

Table 6-1. Voice Mode Command Descriptions (Continued)

DTMF and Tone Generation: (cont.)

1) Single ASCII character in the set, 0-9, #, *, ! and A-D, which is interpreted as a single DTMF tone. DTMF tones are sent as a single element expressed in the form:

	AT+VTS=<DTMF or !>
	For example, to send a DTMF 1 tone, issue AT+VTS=1 to the modem.
	2) String drawn from the first set but not including a flash hook code “!” and en-
	closed in brackets “[ ]”,which can produce a single or dual tone. The string in-
	cludes three parameters, which set the frequency of two non-standard DTMF or
	single tones and a common duration for both. The quantity in brackets consists
	of a three-element list that is expressed in the following format:
	AT+VTS=[<first tone freq 1>, <second tone freq 2>,
	<duration>]
	If the duration is not specified in the <duration> parameter, the modem sends
	tones for the duration specified by the +VTD=n command.
	a) Single tones can be sent in brackets using the following format:
	AT+VTS=[<first tone freq 1>]
+VTS=m	none	or
(cont.)
	AT+VTS=[<first tone freq 1>, <space>, <duration>]
	For example:	AT+VTS=[3000] This sends a single tone of 3000 Hz with a de-
	fault duration specified by +VTD=n.
	For example: AT+VTS=[3000,,50]
	This sends a	single tone of 3000 Hz with a duration of 500 ms (50 x
	0.01 second).

b)Dual tones may be sent using the following format:

AT+VTS=[<first tone freq 1>,<second tone freq 2>]

or

AT+VTS=[<first tone freq 1>,<second tone freq 2>, <duration>]

For example: AT+VTS=[3000,3300]

This sends a dual tone of 3000 Hz and 3300 Hz with the default duration set by the +VTD=n command.

For example: AT+VTS=[3000,3300,50]

This sends a dual tone of 3000 Hz and 3300 Hz with a duration of 500 ms (50 x 0.01 second).

98 Intel Confidential Programmer’s Guide