Siemens Insys 56k Operating Manual page 43

Pocket Modem 56k
Command
ATL<n>
AT%L
AT*L<n>
ATM<n>
Dezember 05
Description
Speaker volume
This command regulates the speaker volume (see ATM)
Speaker volume low (default)
ATL1
Speaker volume medium
ATL2
Speaker volume high
ATL3
Note: The speaker output is optional and is not supported in the standard
version.
Display level of the received signal
The value that is reported from the modem equals the already amplified level within
the modem, not the phone line level.
Large AT%L responses imply a low signal level; small values imply a high signal level
(009 = -9db, 043 = -43db)
Determines the automatic speed limitation
The automatic speed limitation is used to automatically achieve the least possible error
rate for connections without error correction.
In the factory settings the speed limitation is always switched on (AT*L0).
If the limitation is switched off (AT*L1), the modem will always establish the
connection on the phone side with the maximum possible speed (or the speed defined
with AT+MS), irrespective of the data rate at the serial interface. This means that the
INSYS Modem 336 will, for example, always attempt to establish a 33600 baud
connection, even if the serial interface is only set to 9600 baud. Without error correction
the high speed will obviously lead to higher bit error rates, which is usually disruptive.
The automatic speed limitation (AT*L0) will limit the speed on the phone side to the
speed of the serial interface.
It should only be switched off if very low baud rates are employed or if the speed of the
serial interface is changed during the connection.
Speaker control
This command regulates when the speaker is active
(see command ATL).
Speaker always OFF
ATM0
Speaker ON during dialing and connection setup (default)
ATM1
Speaker always ON
ATM2
Speaker on during connection setup
ATM3
AT commands
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