CME GPP-3 Specifications download pdf (Page 157)

3GPP

3GPP TS 27.007 V6.3.0 (2003-

06)

Release 6

C.2.11 DTMF and tone generation +VTS

This command allows the transmission of DTMF tones and arbitrary tones (see note). These tones may be used (for

example) when announcing the start of a recording period. The command is write only. In this profile of commands,

this command does not operate in data or fax modes of operation (+FCLASS=0,1,2-7).

NOTE 1: D is used only for dialling.

The string parameter of the command consists of combinations of the following separated by commas:

1. <DTMF>. A single ASCII character in the set 0-9, #,*,A-D. This is interpreted as a single ACSII character whose

duration is set by the +VTD command.

NOTE 2: In GSM this operates only in voice mode.

2. [<tone1>,<tone2>,<duration>]. This is interpreted as a dual tone of frequencies <tone1> and <tone2>,

lasting for a time <duration> (in 10 ms multiples).

NOTE 3: This does not operate in GSM.

3. {<DTMF>,<duration>}. This is interpreted as a DTMF tone of different duration from that mandated by the

+VTD command.

NOTE 4: In GSM this operates only in voice mode.

Table C.18: +VTS

Command

Return

+VTS=as above

+VTS=?

(list of supported <tone1>s),(list of supported <tone2>s)

,(list of supported <duration>s)

C.2.12 Tone duration +VTD

This 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. A value different than zero causes a tone of duration <n>/10 seconds. The value zero causes a

"manufacturer specific" value.

Table C.19: +VTD

Command

Return

+VTD=<n>

+VTD?

<n>

+VTD=?

(list of supported <n>s)

NOTE: In GSM/UMTS the value of tone duration is preset and cannot be altered.

C.2.13 Transmit data state +VTX

This action command causes the TA to receive audio data from the computer and send it to a destination determined by

the +VLS command. Once the audio datastream has started, commands to the TA shall be embedded in the data stream,

and shielded using the normal <DLE> methods. The transmit process is terminated by the use of embedded commands

or by the time-out of an inactivity timer. It is recommended that the TA has a buffer to allow the TA to convert

potentially bursty data from the computer into synchronous data for "transmission". The command is write only.

Table C.20: +VTX

Command

Return

+VTX

CONNECT

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CME GPP-3 Specifications Page 157

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