Page 218 of 226
Version: 3.3.5
– DR05 – 23.03.2017
Initializing the modem (continued)
L
Loudspeaker volume
ATL0,1 Low volume
ATL2
Medium volume
ATL3
High volume
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>[,<automode>[,<min_tx_rate>[,<max_tx_rate>[,<min_rx_rate>[,<max_rx_
rate>]]]]]
Example: AT+MS= V34,1,9600,33600,9600,33600
Automode
0=disabled
1=enabled (default)
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
buffering and error correction.
AT\N2 V.42LAP-M or MNP 4 error correction. The modem hangs up if a failsafe con-
nection cannot be established.
AT\N3 V.42LAP-M or MNP 4 error correction. A non-failsafe connection will be attempt-
ed if a failsafe connection cannot be established.
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.
Modulation
<carrier>
Possible baud rates
Bell 103
B103
300
Bell 212
B212
1200 Rx 75 Tx or 75 Rx/1200 Tx
V.21
V21
300
V.22
V22
1200
V.22 through V22B
1200, 2400
V.23
V23C
1200
V.32
V32
4800, 9600
V.32 through V32B
4800, 7200, 9600, 12000, 14400
V.34
V34
2400, 4800, 7200, 9600, 12000, 14400, 16800,
19200, 21600, 24000, 26400, 28800, 31200, 33600
