Multitech MultiModemDSVD User Manual page 53

4 AT Commands, S-Registers, and Result Codes
Register Unit Range
S18 seconds 0–255
S24 seconds 0–255
S25 10 ms 0–255
S29 10 ms 0–255
S30 10 ms 0, 1–255
S32 decimal 0–255
S33 decimal 0–255
decimal 0–1
S35
S36 decimal 0–7
Default Description
0 Sets the length of time that the modem
conducts an &T test before returning to the
command mode. If the value is zero, the
test must be terminated from command
mode by issuing an &T0 or H command.
When S18 is non-zero, the modem returns
the OK message upon test termination.
0 Sets the length of time that the modem
operates in normal mode with no detected
telephone or serial port activity before
entering low-power sleep mode. The timer
is reset upon any serial port or telephone
line activity.
5 Sets the length of time that the modem
ignores DTR while taking the action
specified by &D.
70 Sets the length of time that the modem
goes on-hook when it encounters a flash
dial modifier (!) in the dial string.
0 Sets the length of time that the modem
waits before disconnecting when no data
is sent or received. A value of zero
disables the timer.
17 Sets the ASCII code for the XON character.
19 Sets the ASCII code for the XOFF character.
0 0 disables, 1 enables the V.25 data calling
tone, which allows remote data/fax/voice
discrimination.
7 LAPM Failure Control. Specifies the
fallback action to take in the event of an
LAPM negotiation failure. These fallback
options are initiated immediately upon
connection if S48 = 128. If an invalid
number is entered, S36 acts as it the
default value has been entered. (See S48.)
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.
45