INSYS 56k small EU 2.1, Manual

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INSYS Modem 56k small EU 2.1 AT Command Reference
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Command Description
ATP Switch on pulse dialling method (deactivated for some models)
Starting with this command, each dial-up is performed with the pulse dialling method,
until an
ATT or ATDT command switches it back to tone dialling.
ATQ<n>
Quiet control
This command enables or disables sending messages from the INSYS Modem 56k small
EU 2.1 to the application.
ATQ0 Send messages to the application (default)
ATQ1 Don’t send messages to the application
AT%Q Displaying the quality of the telephone connection
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 connec-
tion. If the value increases significantly during a connection, the quality will deteriorate.
After a previous
AT%E command, an Autoretrain is performed.
AT&R
RTS/CTS behaviour
This command determines how the modem treats the RTS/CTS (CT105/CT106) data
flow control lines (refer also to the command
AT&K<n> ).
AT&R0 CTS behaviour complies with V.25bis. CTS is deactivated during the
connection setup after recognition of the response or ringing tones and
will only be activated after the connection is set up.
AT&R1 CTS only switches to OFF when this is required by the data flow control
(default).
ATS<n> Reading/writing the S registry
Depending on the country settings, the S registers may only be changed within certain
limits. The INSYS Modem 56k small EU 2.1 still reports
OK , although the value has not
changed as specified. We recommend checking the results after each write attempt,
using the
ATS<n>? command.
ATS<n>=<x> Sets the S register n to the value x
ATS<n>? Shows the value of the S register n