Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 71)

AN93
Rev. 1.3 71
+MS Options
+MS = A
+MS = A,B
+MS = A,B,C
+MS = A,B,C,
D
+MS = A,B,C,
D,E
+MS = A,B,C,
D,E,F
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)
V92 ITU-T
V.92 (default for Si2493)
B Automatic modulation negotiation
0 Disabled
1 Enabled (default)
C Min Tx rate. Specifies minimum transmission rate.
0
Not configurable; always set to 0.
D Max Tx rate. Specifies highest transmission rate. If not
specified, it is determined by the carrier and automode
settings.
V21 300 V32 9600 V90 33600
V22 1200 V32B 14400 V92 48000
V22B 2400 V34 33600
E Min Rx rate. Specifies minimum receive rate.
0
Not configurable; always set to 0.
F Max 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
+PCW = X
Controls the action to be taken upon detection of call waiting.
X Mode
0 Toggle
RI and collect type II Caller ID if enabled by +VCID.
1 Hang up.
2 Ignore call waiting.
+PIG=X
Controls the use of PCM upstream in a V.92 DCE.
X Mode
0 Enable
PCM upstream.
1 Disable PCM upstream.
+PMH=X
Controls the modem-on-hold procedures.
X Mode
0
Enables V.92 MOH.
1 Disables V.92 MOH.
+PMHF=X
V.92 MOH hook flash. This command causes the DCE to go on-
hook and then return off-hook. If this command is initiated and the
modem is not On Hold, Error is returned.
Table 39. Basic AT Command Set (Continued)
Command Action