Helmholz 700-751-HSM11, Руководство пользователя, Страница: 62 / 99

62 Helmholz Modem 56k 4.1
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
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 differ-
ently 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.
Depending on the settings and the modulation type a fall back or retrain is trig-
gered 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
connection. If the value increases significantly during a connection, the quality
will deteriorate. After a previous
AT%E
command, an Autoretrain is performed.