SI2404 SILABS [Silicon Laboratories], SI2404 Datasheet - Page 29

• Manufacturer Part Number: SI2404
• Description: V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA
• Manufacturer: SILABS [Silicon Laboratories]

4.20. Extended AT Commands
The extended AT commands are supported by the Si2457/34/15/04 and are described in Tables 11 through 13.
&$
&D0
&D1
&D2
&D3
&F
&Gn
&G3
&G4
&G5
&G6
&G7
&G8
&G9
&G10
&G11
&G12
&G13
&G14
&G15
&G16
&G17
&Hn
&H0
&H1
&H2
&H3
Command
Display AT& current settings.
ESC is not used
ESC escapes to command mode from data mode if also enabled by HES U70, bit 15.
ESC assertion during a modem connection causes the modem to go on-hook and return to com-
mand mode.
ESC assertion causes ATZ command (reset and return OK result code).
Restore factory default settings.
Line connection rate limit—This command sets an upper limit on the line speed that the Si2457/34/
15/04 can connect. Note that the &Hn commands may limit the line speed as well (&Gn not used for
&H0 or &H1). Not all modulations support rates given by &G. Any improper setting will be ignored.
1200 bps max
2400 bps max (default for Si2404)
4.8 kbps max
7.2 kbps max
9.6 kbps max
12 kbps max
14.4 kbps max (default for Si2415)
16.8 kbps max
19.2 kbps max
21.6 kbps max
24 kbps max
26.4 kbps max
28.8 kbps max
31.2 kbps max
33.6 kbps max (default for Si2457 and Si2434)
Switched network handshake mode—&Hn commands must be on a separate command line from
ATD, ATA, or ATO commands.
V.90 with automatic fallback (56 kbps to 300 bps) (default for Si2457)
V.90 only (56 kbps to 28 kbps)
V.34 with automatic fallback (33.6 kbps to 300 bps) (default for Si2434)
V.34 only (33.6 kbps to 2400 bps)
Table 11. Extended AT& Command Set (Command Defaults in Bold)
Rev. 1.0
Action
Si2457/34/15/04
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