User manual

AT COMMANDS: DATA MODEM 2-9
ATW1 Once the connection has been established, messages follow se-
quentially regarding the speed on the telephone line, the Error Pro-
tocol and the interface speed
ATW2 Once the connection has been established, only the speed on the
telephone line is advised
X – Extended Connect Messages; Making Connections
The X command determines which modem messages are authorised. Messages 0
to 4 are basic and are always issued.
Messages 5 to 81 are extended modem messages, which can be switched on or
off by using the X command (see also the W command). The X command deter-
mines how the engaged tone will be handled (see also the D command).
ATX0 The modem issues only messages 0 to 4. To dial, the modem goes
on-line, waits for the period of time preset in the S6 register
(standard is 3 seconds) and then dials, whether or not there is a di-
alling tone. Once the connection has been established, a
CONNECT message is issued. If this is not achieved in the time
laid down in the S7 Register (standard is 60 seconds), a NO CAR-
RIER message is issued. The modem does not recognize dialling
or engaged tones.
ATX1 The modem issues all messages. If the W parameter is used in the
Dialling command but no dialling tone is recognized, a NO CAR-
RIER message is issued.
ATX2 The modem waits for a dialling tone and gives a NO DIALTONE
message if the dialling tone is not recognized within the time set in
the S6 Register. The engaged tone is not recognised.
ATX3 The modem issues all messages. The dialling method is as for the
X0 command; however, the busy tone is recognized and quitted
with a BUSY message.
ATX4 The modem dials blind, issues all messages and recognizes the en-
gaged tone (factory setting).
Y – Long Space Disconnect
The Y command determines whether the modem recognizes a “Long Space Dis-
connect” signal, that is, whether it will shut down the line if a Space signal of
longer than 1.6 seconds is received from the remote modem.
ATY0 Space signal not recognized (factory setting)
ATY1 Space signal is recognized. In “Normal” and “Direct” connections,
the modem will send a Space signal 4 seconds before shut-down
before proceeding to “hang up”. Where the connection includes
Error correction, it will go direct from the line.