Silicon Laboratories SI2494/39 manual V22B ITU-T V.22bis default for Si2404, Enabled default

AN93

Table 39. Basic AT Command Set (Continued)

Command				Action
	Modulation Selection.
	A	Preferred modem carrier
		V21	ITU-T V.21
		V22	ITU-T V.22
		V22B ITU-T V.22bis (default for Si2404)
		V32	ITU-T V.32
		V32B ITU-T V.32bis (default for Si2415)
		V34	ITU-T V.34 (default for Si2434)
		V90	ITU-T V.90 (default for Si2457)
+MS Options		V92	ITU-T V.92 (default for Si2493)
	B	Automatic modulation negotiation
+MS = A
		0	Disabled
+MS = A,B
		1	Enabled (default)
+MS = A,B,C
	C	Min Tx rate. Specifies minimum transmission rate.
+MS = A,B,C,
		0	Not configurable; always set to 0.
D
	D	Max Tx rate. Specifies highest transmission rate. If not
+MS = A,B,C,
		specified, it is determined by the carrier and automode
D,E
		settings.
+MS = A,B,C,
		V21	300	V32	9600	V90	33600
D,E,F
		V22	1200	V32B	14400	V92	48000
		V22B	2400	V34	33600

EMin Rx rate. Specifies minimum receive rate.

0 Not configurable; always set to 0.

FMax Rx rate. Specifies maximum receive rate. If not specified (set to 0), it is determined by the carrier and automode settings.

		V21		300	V32	9600	V90	54666
		V22		1200	V32B	14400	V92	54666
		V22B		2400	V34	33600
	Controls the action to be taken upon detection of call waiting.
	X	Mode
+PCW = X	0	Toggle	RI	and collect type II Caller ID if enabled by +VCID.
	1	Hang up.
	2	Ignore call waiting.
	Controls the use of PCM upstream in a V.92 DCE.
+PIG=X	X	Mode
	0	Enable PCM upstream.
	1	Disable PCM upstream.
	Controls the modem-on-hold procedures.
+PMH=X	X	Mode
	0	Enables V.92 MOH.
	1	Disables V.92 MOH.
	V.92 MOH hook flash. This command causes the DCE to go on-
+PMHF=X	hook and then return off-hook. If this command is initiated and the
	modem is not On Hold, Error is returned.

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