Advanced AT Commands for SupraExpress 56 i PRO series

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[AT commands]

This is not a comprehensive list of all AT commands. However, it does include commands and codes not available on all modem models. To find out what features your modem supports, issue ATi10 from a terminal program. The most current AT Command lists are available on Diamond's various online services.
ATI commands:
I Report Identification and Diagnostic Information: I2 Returns checksum on the firmware ROM; I3 Returns firmware version, name of modem (based upon SUP number), date; I4 Returns K56FLEXDP; I92 Returns product code I.D. number SUPxxxx of modem.

AT# commands:
#MFR=Identify Manufacturer: This command request the modem manufacturer

#VBS=Bits Per Sample: This command selects the degree of ADPCM voice compression or format of linear PCM to be used
: Parameters: n = 2 or 4 (ADPCM Voice compression) bits/sample or 8 (PCM) bits/sample

Default: 4

#VSD=Enable Silence Deletion (Voice Receive) [ADPCM]

This command provides command response compatibility.

Parameters: n = 0 or 1

Default: 0

#VSP=Silence Detection Period (Voice Receive) [ADPCM]: This command sets the Voice Receive Mode silence detection period (inactivity timer) value. The parameter, in units of 100 ms, can be used when receiving voice data. This is an amount of time, which if elapsed without receiving any ADPCM data, causes the modem to send the <DLE>s or <DLE>q codes after insuring that the buffer is empty.; The modem determines what constitutes silence. This involves monitoring and debouncing the modem value for average energy. If this debounced value is less than an arbitrary threshold constituting the modem's definition of silence for a period greater than that defined by the #VSP setting, the modem sends the <DLE>q or <DLE>s shielded code to the DTE.; Parameters: n = 0 - 255 (0-25.5 seconds); Default: 55

#VSR=Sampling Rate Selection

This parameter, along with the bits per sample (VBS) command, determines the necessary DTE interface speed to transmit and receive in Voice/Audio Mode.

Parameters: n = 7200 (7200 Hz sampling rate for ADPCM or PCM) or

n = 11025 (11.025 kHz sampling rate for PCM only)

Default: 7200

#VSS=Silence Detection tuner (Voice Receive) [ADPCM]: This command enables or disables the Voice Receive mode silence detection and controls the sensitivity employed by the modem in ADPCM compressing periods of silence.; Parameters: n = 0 - 3; Default: 0

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