Lucent-technologies Host-Based Controller Modem AT Uživatelský manuál stáhnout pdf (Strana 55)

Data Addendum Host-Based Controller Modem

June 15, 1998 AT Command Set

AT Voice Commands Reference (continued)

Version 1.0 Lucent Technologies Inc.

Example # 8: Call screening & recording a message with TAD—using the wave driver to transmit and

receive voice samples

The TAD application is loaded. The modem is initially idle, in data mode (+FCLASS=0).

Command Description

RING DCE reports ringing from remote station.

AT+FCLASS=8 The modem enters voice mode.

OK DCE responds.

AT+VGT=128 Set speaker volume to normal.

OK DCE responds.

AT+VSD=128,0 DTE selects normal silence detection sensitivity, and a silence detection interval

of 0 seconds. Disable silence detection.

OK DCE responds.

AT+VSM=129,8000 DTE selects 16-bit linear voice compression with 8.0 kHz sampling rate.

OK DCE responds.

<DLE>-R DCE detects another ring, and notifies DTE.

AT+VLS=1 The modem answers call.

OK DCE is off-hook

The TAD next plays its greeting message, issues a beep, and records the caller's message.

The Application may transmit voice samples using the wave driver. The application may issue

WAVE_OUT_OPEN and WAVE_OUT_WRITE messages to the wave driver.

At the end of the greeting message the application may issue the WAVE_OUT_STOP message to the wave

driver.

AT+VTS=[933,0,120] DTE annotates greeting message with a 1.2 second beep.

OK DCE responds.

The Application may receive voice samples using the wave driver. The application may issue

WAVE_IN_OPEN and WAVE_IN_START messages to the wave driver.

AT+VSD=128,50 DTE selects normal silence detection sensitivity and a silence detection interval

5 seconds. Enable silence detection.

OK DCE responds.

AT+VLS=5 Speaker is attached to system, and modem is off-hook.

OK DCE is off-hook

The caller leaves a message, and hangs up. The modem detects silence for a specified period of time,

and then notifies the DTE.

<DLE>-s DCE issues presumed end of message after silence detection interval has

elapsed.

At the end of the message the application may issue the WAVE_IN_STOP message to the wave driver.

ATH DTE issues standard command to terminate call. DCE goes on-hook,

speaker and microphone are detached from system, and modem returns to

data mode (+FCLASS=0).

OK DCE response.

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