User`s manual

AT Command Reference Manual
1048 3-7
Mn - Speaker Control
This command selects when the speaker will be on or off. The parameter value, if valid, is written to S22 bits 2 and 3.
M0 Speaker is always off.
M1 Speaker is on during call establishment, but off when receiving carrier. (Default.)
M2 Speaker is always on.
M3 Speaker is off when receiving carrier and during dialing, but on during answering.
Result Codes:
OK n = 0 to 3.
ERROR Otherwise.
Nn - Automode Enable
This command enables or disables automode detection. The parameter value, if valid, is written to S31 bit 1.
N0 Automode detection is disabled (equivalent to setting the +MS <automode> subparameter to 0). A
subsequent handshake will be conducted according to the contents of S37 or, if S37 is zero,
according to the most recently sensed DTE speed.
N1 Automode detection is enabled (equivalent to setting the +MS <automode> subparameter to 1). A
subsequent handshake will be conducted according the automode algorithm supported by the
modem, e.g., according to the contents of S37 or, if S37 is zero, starting at 28800 bps V.34
(RC288). This command is also equivalent to F0 (RC144). (Default.)
Result Codes:
OK n = 0 or 1.
ERROR Otherwise.
Notes:
1. The Nn and S37=x commands override the +MS command settings. When the N0 or N1 command is issued, the +MS
subparameters are updated to reflect the Nn and S37 values (see +MS command and S37 register). For example:
N1S37=10 updates the +MS command subparameters to reflect +MS=10,1,300,12000
N0S37=10 updates the +MS command subparameters to reflect +MS=10,0,12000,12000
2. Use of the +MS command is recommended instead of the Nn and S37=x commands. Nn and S37=x commands are
supported for compatibility with existing communication software.
On - Return to On-Line Data Mode
This command determines how the modem will enter the on-line data mode. If the modem is in the on-line command mode,
the enters the on-line data mode with or without a retrain. If the modem is in the off-line command mode (no connection),
ERROR is reported.
O0 Enters on-line data mode without a retrain. Handling is determined by the Call Establishment task.
Generally, if a connection exists, this command connects the DTE back to the remote modem
after an escape (+++).
O1 Enters on-line data mode with a retrain before returning to on-line data mode.
Result Codes:
OK n = 0 or 1 and a connection exists.
ERROR Otherwise or if not connected.