Helmholz 700-751-HSM11, Manual, Page: 55 / 99

Helmholz Modem 56k 4.1 55
Command Description
AT+IPR=<n>
Determine baud rate
The command
AT+IPR
switches the automatic baud rate detection on and off.
AT+IPR=0
Activates the automatic baud rate detection (default)
AT+IPR=<n>
Sets the modem to the fixed baud rate n. The following baud rates
are supported: 300, 1,200, 2,400, 4,800, 9,600, 19,200, 38,400,
57,600 and 115,200.
The setting
AT+IPR
is not saved with
AT&W
, which means that in order to inacti-
vate auto bauding, the command
AT+IPR
must be sent to the modem every time
it is switched on.
AT&K<n>
Select data flow control between the PC and the modem (handshake)
Fax operation default is RTS/CTS.
AT&K0
No data flow control
AT&K3
Select data flow control RTS/CTS (default)
AT&K4
Select data flow control XON/XOFF
AT&K5
Select transparent data flow control XON/XOFF
AT&K6
Select RTS/CTS and XON/XOFF data flow control
AT&K8
Activates the controlled half duplex operation on the serial interface
for RS485. In this mode, the CTS signal is deactivated (high), while
the HELMHOLZ modem sends data at the serial interface. Thus, the
CTS signal can be used as driver release signal for a RS485 driver.
The polarity can be set with
AT&R
.
AT-K<n>
Extended MNP functions (MNP 10)
This command determines if a V.42LAP-M connection can be switched to a MNP
10 connection
AT-K0
Disables switching from V.42 LAP-M to MNP 10 (default)
AT-K1
Enables switching from V.42 LAP-M to MNP 10