Multitech MultiModem MT5600ZDXV Owner's Manual page 56

Bits 3-7
Register Unit
S 3 7
Bit-Mapped Options Status (Indicates the status of command
Options.) Desired DTE Connection Speed Default: 0
When the Nn command is issued or the S37 register value is modified, the
+MS command subparameters are updated to reflect the speed and the
modulation specified bit the S37 value. For Example:
If N0 command is active, S37 = 10 updates the +MS command subparameters
to reflect +MS = 10,1,300,12000.
IF N1 command is active, S37 = 10 updates the +MS command subparam-
eters to reflect +MS = 10,0,12000,12000.
S37 is not updated by the +MS command.
Use of the +MS command is recommended instead of the Nn and S37 = x
commands. Nn and S37 = x commands are supported for compatibility with
existing communications software.
Bits 0-4 Desired line connection speed. If an invalid number is entered, the
number is accepted into the register, but S37 will act as if the default value
has been entered.
0 = Attempt automode connection. If N0 is active, connection is attempted
at the most recently sensed DTE speed (+MS command settings are updated
to the most appropriate values). If N1 is active, connection is attempted at
the highest possible speed (+MS settings are updated to 11,1,300,2880 to
reflect V.34, automode, 300 bps minimum speed, and 28800 bps maximum
speed)--Default.
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 (Default)
Range Default Description
Reserved