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HC25 AT Command Set - Portech.com.tw

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<strong>HC25</strong> <strong>AT</strong> <strong>Command</strong> <strong>Set</strong><br />

16.4 <strong>AT</strong>+VTS<br />

s<br />

16.4 <strong>AT</strong>+VTS DTMF and tone generation<br />

<strong>AT</strong>+VTS is intended to send ASCII characters which cause the Mobile Switching Center (MSC) to transmit DTMF<br />

tones to a remote subscriber. The <strong>com</strong>mand can only be used during active voice calls and offers the following<br />

variant:<br />

• <strong>AT</strong>+VTS=[,] allows to send a single DTMF tone. The duration can be indvidually determined<br />

during the call.<br />

Syntax<br />

Test <strong>Command</strong><br />

<strong>AT</strong>+VTS=<br />

Response(s)<br />

+VTS: (list of supporteds), (list of supporteds)<br />

OK<br />

Write <strong>Command</strong><br />

<strong>AT</strong>+VTS=[, ]<br />

Response(s)<br />

OK<br />

ERROR<br />

+CME ERROR<br />

Reference(s) PIN USB0-MDM USB0-APP Last<br />

GSM 07.07 - + + -<br />

Parameter Description<br />

(str)<br />

ASCII character in the set 0...9,#,*, A, B, C, D. The string must be enclosed in quotation marks ("...").<br />

(num)<br />

Tone duration in 1/10 seconds with tolerance. If not specified the default value (300 ms) is used.<br />

The minimum duration of DTMF signals is 300ms. DTMF tones below 300ms cannot be generated.<br />

1...[3]...255<br />

<strong>HC25</strong>_<strong>AT</strong>C_V01.200 Page 253 of 290 7/25/07<br />

Confidential / Released

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