Initializing the modem (continued)
L
Loudspeaker volume
ATL0,1 Low volume
ATL2
ATL3
M
Loudspeaker mode
ATM0 Loudspeaker always on
ATM1 Loudspeaker on until data carrier signal is detected
ATM2 Loudspeaker on when the modem is ready to dial
ATM3 Loudspeaker off while the number is being dialed and then, after dialing, until a
data carrier signal is detected
+MS
Selects the modulation type
This command sets the modulation type and the bit rates negotiated between the local
and remote modems.
Syntax: +MS=[<carrier>[,<auto-
mode>[,<min_tx_rate>[,<max_tx_rate>[,<min_rx_rate>[,<max_rx_rate>]]]]]
Example: AT+MS= V34,1,9600,33600,9600,33600
Modulation
<carrier>
Bell 103
B103
Bell 212
B212
V.21
V21
V.22
V22
V.22 through V22B
V.23
V23C
V.32
V32
V.32 through V32B
V.34
V34
Automode
AT+MS? Shows the current setting
\N
Selects the error correction settings
AT\N0 Error correction switched off
AT\N1 Transparent transmission of any data widths via the serial interface, without data
AT\N2 V.42LAP-M or MNP 4 error correction. The modem hangs up if a failsafe con-
AT\N3 V.42LAP-M or MNP 4 error correction. A non-failsafe connection will be at-
AT\N4 V.42LAP-M error correction; the modem hangs up if this is not possible.
AT\N5 MNP error correction; the modem hangs up if this is not possible.
Medium volume
High volume
0=disabled
1=enabled (default)
buffering and error correction.
nection cannot be established.
tempted if a failsafe connection cannot be established.
Possible baud rates
300
1200 Rx 75 Tx or 75 Rx/1200 Tx
300
1200
1200, 2400
1200
4800, 9600
4800, 7200, 9600, 12000, 14400
2400, 4800, 7200, 9600, 12000, 14400, 16800,
19200, 21600, 24000, 26400, 28800, 31200, 33600
Page 231 of 237
Version: 5.1.6 – June 4
th
, 2018
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