Multitech MultiModem MT5600ZDX User Manual page 45

4 AT Commands, S-Registers, and Result Codes
Register Unit Range
S36 decimal 0–7
S37 decimal 0–12
seconds 0–255
S38
Default Description
7 LAPM Failure Control. Specifies the fall-
back action to take in the event of an LAPM
negotiation failure. These fallback options
are initiated immediately upon connection
if S48 is set to 128. If an invalid number is
entered, S36 acts as if the default value has
been entered. (See S48.)
Bitmap values - default 0000 0111
0 Modem disconnects.
1 Modem stays online and a direct mode
connection is established.
2 Reserved.
3 Modem stays on-line and a normal
mode connection is established.
4 An MNP connection is attempted and
if it fails, the modem disconnects.
5 An MNP connection is attempted and
if it fails, a direct mode connection is
established.
6 Reserved.
7 An MNP connection is attempted and
if it fails, a normal modem connection
is established.
0 Sets the maximum V.34 speed at which the
modem attempts to connect. The default
value attempts an automode connection. If N0
is active, connection is attempted at the most
recently sensed serial port speed (+MS=
command settings are updated to the
appropriate values). If N1 is active, connection
is attempted at the highest possible speed.
(+MS= settings are updated to 11,1,300,33600
to reflect V.34, automode, 300 bps minimum
speed, and 33600 bps maximum speed).
Supported only for compatibility with
existing software; use the +MS= command
instead.
20 Sets the delay between the modem's receipt of
the H command to disconnect (or high-to-
low transition of DTR if the modem is
programmed to follow the signal), and the
disconnect operation. Applies only to error-
correction connections. This register can be
used to ensure that data in the modem buffer
is sent before the modem disconnects. If S38
is set to a value between 0 and 254, the
modem waits for the remote modem to
acknowledge all data in the modem buffer
before disconnecting. If S38 is set to 255, the
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