Multitech MultiModem MT5600ZDX User Manual page 44

4 AT Commands, S-Registers, and Result Codes
Register Unit Range
S18 seconds 0–255
S19 decimal 0–255
S20 decimal 0–255
S25 0–255
hundreths
of a second
(async)
S29 10 ms 0–255
S30 10 ms 0–255
S32 decimal 0–255
S33 decimal 0–255
Default Description
0 Sets the number of seconds that the modem
conducts 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.
0 Auto Sync Bit Mapped Options: Defines the
options for Auto Sync operation (see the
&Q4 command). S19 must be set to the
desired value before &Q4 is issued.
0 Reserved
1 SBC/HDLC format select
0 =BSC selected (Default)
1 =HDLC selected
2 Address detection enable/disable
0 =Disable (Default)
1 =Enabled
3 NRZI/NZI
0 =ZRZI (Default)
1 =NZI
4 Idle indicator select
0 =Mark idle (Default)
1 =Flag or sync idle
5–7 Reserved
0 Auto Sync HDLC Address or BSC Sync
Character: Defines the HDLC a address (S19
bit 1 = 1) or DSC Sync Character (S19 bit 1 =
0) for Auto Sync operation (see &Q4
command). S20 must be set to the desried
value before &Q4 is issued.
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. Applies to asynchronous opera-
tion only.
17 Sets the ASCII code for the XON character.
19 Sets the ASCII code for the XOFF character.
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