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SIM900 AT Command Manual

SIM900_AT Command Manual_V1.03 81 12/24/2010

Response

TA reports one or more lines of information text which permit the user to

identify the version, revision level or data or other information of the

device.

Revision:<Revision Id>

Execution

Command

AT+FMR

Parameter

<Revision Id> the version, revision level or data or other information

of the device.

Reference

EIA/TIA-578-D

Note

3.2.40 AT+VTD Tone Duration

AT+VTD Tone Duration

Response

+VTD: (list of supported <n>s)

Test Command

AT+VTD=?

Parameter

See Write Command

Response

+VTD: <n>

Read Command

AT+VTD?

Parameter

See Write Command

Response

This Command refers to an integer <n> that defines the length of tones

emitted as a result of the +VTS Command. This does not affect the D

Command.

Write Command

AT+VTD = <n>

Parameter

<n> 1-255 duration of the tone in 1/10 seconds

Reference

GSM 07.07 [13]

Note

3.2.41 AT+VTS DTMF and Tone Generation

AT+VTS DTMF and Tone Generation

Test Command

AT+VTS=?

Response

+VTS: (list of supported <dtmf>s), ,(list of supported <duration>s)

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