MultiModemDSVD User Guide 4 AT Commands, S-Registers, and Result Codes
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S18 seconds 0–255 0 Sets the length of time that the modem con-
ducts an &T test before it returns 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.
S24 seconds 0–255 0 Sets the length of time that the modem op-
erates in normal mode with no detected
telephone or serial port activity before en-
tering low-power sleep mode. The timer is
reset upon any serial port or telephone line
activity.
S25 10 ms 0–255 5 Sets the length of time that the modem ig-
nores DTR while taking the action specified
by &D.
S29 10 ms 0–255 70 Sets the length of time that the modem goes
on-hook when it encounters a flash dial
modifier (!) in the dial string.
S30 10 ms 0, 1–255 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.
S32 decimal 0–255 17 Sets the ASCII code for the XON character.
S33 decimal 0–255 19 Sets the ASCII code for the XOFF character.
S35 decimal 0–1 0 0 disables, 1 enables the V.25 data calling
tone, which allows remote data/fax/voice
discrimination.
S36 decimal 0–7 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 = 128. If an invalid number is entered,
S36 acts as if the default value has been en-
tered. (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.
Register Unit Range Default Description