Datasheet

INSYS Modem 336/56k 4.1 (UL) AT Command Set
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 CONNECT
has taken place. After the password has been entered correctly, the actual CONNECT will
take place and data may be transmitted. If a wrong password was entered, the modem
will hang up. The password is the same as for remote control and is set with AT*C .
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 values
indicate a good line quality. The line quality value must be evaluated differently depend-
ing 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. Depend-
ing 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 connec-
tion. If the value increases significantly during a connection, the quality will deteriorate.
After a previous AT%E command, an Autoretrain is performed.
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