AT Command Set
INSYS Modem 56k small INT 2.0/USB 1.0
60
June 06
Command
Description
AT*P<n>
Password
query
AT*P0
Switches the password query off after the connection has been estab-
lished (default).
AT*P1
Switches the password query on after the connection has been estab-
lished.
If the password query is activated, the modem will query the password after
CON-
NECT
has taken place.
After the password has been entered correctly, the actual
CON-
NECT
will take place and data may be transmitted. If a wrong password was entered,
the modem will hang up.
Note:
This is set using
AT*C
.
The passwords for the connection setup and
the remote control are the same.
ATQ<n>
Quiet
control
This command toggles sending messages from the modem to the application ON and
OFF.
ATQ0
Send messages to application (default).
ATQ1
Don’t send messages to application.
AT%Q
Display telephone call quality
Displays the quality of the data connection (deviation from the eye diagram). Low val-
ues indicate a good line quality. The line quality value must be evaluated differently
depending on the negotiated data rate.
Connections with more than 9600 baud will reach the value “000” for good lines and
should not have values of more than “010”.
For connections with 33600 baud good lines will have values between 010…030. De-
pending on the settings and the modulation type a fall back or retrain is triggered if
the line quality is too bad to enable a new negotiation of the connection (if necessary
with a slower speed).
High values indicate bad quality. These values are constantly updated during a con-
nection. If the value increases significantly during a connection, the quality will dete-
riorate. After a previous
AT%E
command, an Autoretrain is performed.
