Specifications

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L0: Selects lowest volume.
L1: Selects low volume.
L2: Selects medium volume (default).
L3: Selects high volume.
Result Codes:
OK n = 0, 1, 2, 3
ERROR Otherwise
Mn Monitor Speaker Mode
This command turns the speaker on or off.
M0: The speaker is off.
M1: The speaker is on until the modem detects the carrier signal (default).
M2: The speaker is always on when modem is off-hook.
M3: The speaker is on until the carrier is detected, except while dialing.
Result Codes:
OK n = 0, 1, 2, 3
ERROR Otherwise
Nn Modulation Handshake
This command controls whether or not the local modem performs a negotiated
handshake at connection time with the remote modem when the communication
speed of the two modems is different.
N0: When originating or answering, this is for handshake only at the com-
munication standard specified by S37 and the ATB command.
N1: When originating or answering, begin the handshake only at the com-
munication standard specified by S37 and the ATB command. During
handshake, fallback to a lower speed may occur (default).
Result Codes:
OK n = 0, 1
ERROR Otherwise
On Return from On-line to Data Mode
O0: Instructs the modem to exit on-line command mode and return to data