User manual

2-16 AT COMMANDS: DATA MODEM
\K – Type of Break Control
The \K command determines how the modem by-passes with a Break signal.
Table 3 Break Control
\L – Determining Block/Stream Mode with MNP
This command is used to determine the transmission mode with MNP connec-
tions.
AT\L0 Stream Mode: maximum block size is determined with \A
AT\L1 Remote modem block mode is authorised
\N – Data Transmission Mode
The \N command is used to set up the preferred data transmission mode (Direct,
Normal, MNP or V.42bis).
AT\N0 The modem tries to create a “Normal” connection (without data
compression and Error correction). The intermediate store is used
for buffering, as with an MNP connection. This data buffering per-
mits different data rates at the interface and on the telephone line.
AT\N1 The modem makes a direct connection to the remote modem. No
MNP is used and the Baud rate at the interface is adjusted to the
Baud rate on the telephone line. To achieve successful data trans-
mission, the data rate of the computer must, where appropriate, be
adjusted to the transmission speed.
AT\TN2 The modem first tries to make a V.42 connection and then an MNP
connection (Reliable). Where no Error Check is authorised at the
remote modem, the modem will break off the connection and re-
turn to Command mode.
Break by Computer in
Data Mode
Break by Computer in
ESC-Command Mode
Break by Remote
Modem in “Normal”
Connection
\K0
No break to remote
modem; go into ESC
command mode
Delete buffer send Break
immediately to remote
modem
Delete buffer and send
Break to computer
\K1
Delete buffer send break
to remote modem
as \K0
\K2
as \K0 Send Break immediately to
remote modem
Send Break immediately
to computer
\K3
Send Break immediately
to remote modem
as \K2
as \K2
\K4
as \K0 Send Break in Data
sequence to remote modem
Send Break in Data
sequence to computer
\K5*
Send Break in Data
sequence to remote
modem
as \K4
as \K4