SM336 Manual
21
Bits 0-2 This value indicates what should happen upon a LAPM failure. These fallback options are initiated
immediately upon connection if S48=128. If an invalid number is entered, the number is accepted into the register,
but S36 will act as if the default value has been entered.
0 = Modem disconnects.
1 = Modem stays on-line 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 mode connection is established. (Default.)
Bits 3-7 Reserved
S37 - Desired Line Connection Speed
S37 specifies the desired line connection speed.
1. When the Nn command is issued or the S37 register value is modified, the +MS command subparameters are updated
to reflect the speed and modulation specified by the S37 value (see +MS command). For example:
If N0 command is active, S37=10 updates the +MS command subparameters to rMS=10,1,300,12000
If N1 command is active, S37=10 updates the +MS command subparameters to rMS=10,0,12000,12000
2. S37 is not updated by the +MS command.
3. 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 communication software.
Default: 0
Bits 0-4 Desired line connection speed. This is interlinked with the Fn command (RC144). 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 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.)
1-3 = Attempt to connect at 300 bps. F1 command (RC144).
4 = Reserved.
5 = Attempt to connect at V.22 1200 bps. F4 command (RC144).
6 = Attempt to connect at V.22 bis 2400 bps. F5 command (RC144).
7 = Attempt to connect at V.23.
8 = Attempt to connect at V.32 bis/V.32 4800 bps. F6 command (RC144).
9 = Attempt to connect at V.32 bis/V.32 9600 bps. F8 command (RC144).
10 = Attempt to connect at V.32 bis 12000 bps. F9 command (RC144).
11 = Attempt to connect at V.32 bis 14400 bps. F10 command (RC144).
12 = Attempt to connect at V.32 bis 7200 bps. F7 command (RC144).
Bits 5-7 Reserved.
S38 - Delay Before Forced Hang Up
S38 specifies the delay between the modem's receipt of the H command to disconnect (or ON-to-OFF transition of DTR if the
modem is programmed to follow the signal), and the disconnect operation. Applicable to error-correction connection only.
This register can be used to ensure that data in the modem buffer is sent before the modem disconnects.
1. If S38 is set to a value between 0 and 254, the modem will wait that number of seconds for the remote modem to
acknowledge all data in the modem buffer before disconnecting. If time expires before all data is sent, the NO CARRIER
result code will be issued to indicate that data has been lost. If all data is transmitted prior to time-out, the response to the
H0 command will be OK.
