參數資料
| 型號： | SI2494-A-GM |
| 廠商： | Silicon Laboratories Inc |
| 文件頁數： | 33/70頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ISOMODEM 56KBPS 38-QFN |
| 標準包裝： | 364 |
| 系列： | * |
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Si2494/39
Rev. 1.0
39
+VRX
Receive Voice Stream.
Enable DTE receive of voice stream. The DCE will return a CONNECT response followed by
the voice stream as defined by the +VSM command. The DTE can issue a <DLE><!> or
<DLE><ESC> sequence to terminate the receive stream. The DCE will return a
<DLE><ETX> followed by an OK response for <DLE><!> and <DLE><ESC> followed by an
OK response for <DLE><ESC>. The DCE can be configured to terminate the stream using
the DTE/DCE Inactivity Timer, which is configured using the +VIT command. The DTE will
need to process any <DLE> shielded events present in the data stream. Any <DLE><DLE>
sequences can be preserved to allow less overhead during playback of the stream with the
+VTX command.
+VSD = <sds>,
<sdi>
Silence Detection.
<sds>
Noise level sensitivity
127
Less aggressive [more sensitive, lower noise levels considered to be
silence].
128
Nominal level of sensitivity.
129
More aggressive [less sensitive, higher noise levels considered to be
silence].
<sdi> sets the length of a time interval in 0.1 second units, which must contain no or little
activity, before the ISOmodem will report (QUIET) (<DLE><q>). Default is five seconds.
+VSM = n
Voice Compression Method.
0 Signed PCM
1 Unsigned PCM
4 G.711 -Law
5 G.711 A-Law
129 ADPCM 2-bit (2 kB/s storage)
131 ADPCM 4-bit (4 kB/s storage)
+VSP
Voice Speakerphone State
<mode> Description
0 Speakerphone AEC, AES and LEC disabled.
Handset FIR filter coefficients are selected.
1 Speakerphone AEC, AES and LEC enabled.
Speakerphone FIR filter coefficients are selected.
The +VLS=13 command must be used in combination with this setting.
+VTD = n
DTMF / Tone Duration Timer.
This command sets the default DTMF / tone generation duration in 10 ms units for the +VTS
command. Default time is 1 second (n = 100).
Table 10. Basic AT Command Set (Command Defaults in Bold) (Continued)
Command
Action
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相關代理商/技術參數 |
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| SI2494-A-GMR | 制造商:Silicon Laboratories Inc 功能描述:56 KBPS, V.92 ISOMODEM +VOICE SYSTEM-SIDE - LEAD-FREE - Tape and Reel 制造商:Silicon Laboratories Inc 功能描述:IC ISOMODEM 56KBPS 38-QFN |
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