Modem 常用AT指令集(23) +FPTS: Page transfer status.+FPTS= Page transfer status.+FREV? Identify revision.+FSPL Enable polling+FTSI: Report the transmit station ID.VOICE/AUDIO COMMANDS#BDR Select baud rate (turn off autobaud).#CLS Select data, fax, or voice.#MDL? Identify model.#MFR? Identify manufacturer.#REV? Identify revision level.#SPK= Speakerphone setting.#TL Audio output transmit level.#VBQ? Query buffer size.#VBS Bits per sample.#VBT Beep tone timer.#VCI? Identify compression method.#VGT Set playback volume in the command state.#VLS Voice line select.#VRA Ringback goes away timer (originate).#VRN Ringback never came timer (originate).#VRX Voice receive mode.#VSD Enable silence deletion (no function, command response only).#VSK Buffer skid setting.#VSP Silence detection period (voice receive).#VSR Sampling rate selection.#VSS Silence detection tuner (voice receive).#VTD DTMF/tone reporting.#VTM Enable timing mark placement.#VTS Generate tone signals.#VTX Voice transmit mode.