SI2457-D-FT Silicon Laboratories Inc, SI2457-D-FT Datasheet - Page 177
SI2457-D-FT
Manufacturer Part Number
SI2457-D-FT
Description
IC ISOMODEM SYSTEM-SIDE 24TSSOP
Manufacturer
Silicon Laboratories Inc
Specifications of SI2457-D-FT
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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<freq2>, <dur>],[...]...
+VTS = [<freq1>,
Command
+VTX
Table 110. Extended AT+ Command Set (Continued)
DTMF and Tone Generation
This command can be used to produce single-frequency tones and double-frequency
tones (i.e. DTMF digit). All three parameters are required for correct operation.
<freq1>
<freq2>
<dur>
For only a single tone, use <freq1> with zero value for <freq2>. Bracket syntax can be
used to group sets of tones to generate simple melodies, e.g.
+VTS=[500,0,10],[600,200,20],[700,250,30]
Transmit Voice Stream
Enable DTE transmit of voice stream to DCE. The DCE will return a CONNECT
response. The DTE sends the voice stream as defined by the +VSM command. Any
0x10 character in the voice stream must be shielded with a <DLE>. The DTE issues a
<DLE><ETX> sequence to terminate the transmit stream. The DCE will respond with
<DLE><ETX> followed by OK. The DCE can be configured to terminate the stream
using the DTE/DCE Inactivity Timer, which is configured using the +VIT command.
Frequency one, which has a range of 0, 200-3200 Hz.
Frequency two, which has a range of 0, 200-3200 Hz.
Duration of the tone(s) in 10 ms units.
Rev. 1.3
Action
AN93
177
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