Multi-Tech Systems MT5634ZLXI Manuel D’Utilisation
Chapter 4 – AT Commands, S-Registers, and Result Codes
MT5634ZLX, MT5634ZLXI, MT5634ZLX/FE User Guide
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S-Registers (ATSn=x)
S-Registers (ATSn=x)
S-Registers (ATSn=x)
S-Registers (ATSn=x)
Certain modem parameters are stored in memory locations called S-Registers. Use the S command to
read or alter the contents of S-Registers.
read or alter the contents of S-Registers.
Register Range
Factory
Default
Description
S0
0–255
0
Sets number of the rings required before the modem automatically
answers a call. Set “S0=0” to disable auto-answer mode.
answers a call. Set “S0=0” to disable auto-answer mode.
S1
0–255
0
Counts the incoming rings and stores the value to this register. The value
of this register is incremented with each ring. If no rings occur over an 8
seconds interval, this register is cleared. User can read but should not
change this value.
of this register is incremented with each ring. If no rings occur over an 8
seconds interval, this register is cleared. User can read but should not
change this value.
S2
0–255
043
Holds the decimal value of the ASCII character used as the escape
character. The default value (043) corresponds to an ASCII character “+”
(plus). A value of 128 to 255 disables the escape process; i.e., no escape
character will be recognized 043.
character. The default value (043) corresponds to an ASCII character “+”
(plus). A value of 128 to 255 disables the escape process; i.e., no escape
character will be recognized 043.
S3
0–127
013
Holds the decimal value of the Carriage Return <cr> character used as the
command line and result code terminator (asynchronous operation only).
command line and result code terminator (asynchronous operation only).
S4
0–127
010
Holds the decimal value of the character recognized as a line feed after
the carriage return control character, if verbose result codes are enabled.
the carriage return control character, if verbose result codes are enabled.
S5
0–127
008
Holds the decimal value of the character recognized as a backspace
(asynchronous operation only). The modem will not recognize the
backspace character if this register is set to a value greater than 32.
(asynchronous operation only). The modem will not recognize the
backspace character if this register is set to a value greater than 32.
S6
0–255
002
Sets the length of time, in seconds, that the modem must wait (minimum 2
seconds even if the value is less than 2) after going off-hook before dialing
the first digit of the telephone number.
seconds even if the value is less than 2) after going off-hook before dialing
the first digit of the telephone number.
S7
1–255
050
Sets the time, in seconds, that the modem must wait before hanging up
because a carrier is not detected.
because a carrier is not detected.
S8
0–255
002
Sets the time, in seconds, that the modem must pause when the “,” dial
modifier is encountered in the dial string.
modifier is encountered in the dial string.
S10
1–255
020
Sets the length of time, in tenths of a second, that the modem waits before
hanging up after a loss of carrier.
hanging up after a loss of carrier.
S11
50–255
095
Sets the DTMF duration and inter digit delay in milliseconds, in DTMF
touch-tone dialing.
touch-tone dialing.
S12
0–255
050
Defines the maximum period, in 2-hundredths of a second, allowed
between consecutive asynchronous escape character “+” (plus) for the
escape sequence to be considered valid.
between consecutive asynchronous escape character “+” (plus) for the
escape sequence to be considered valid.
S16
0–18
0
Selects DTE speed during data transfer.
0
Last auto-baud speed
1
300 bps
2
600 bps
3
1200 bps
4
2400 bps
5
4800 bps
6
9600 bps
7
7200 bps
8
12000 bps
9
14400 bps
10
16800 bps
11
19200 bps
12
21600 bps
13
24000 bps
14
26400 bps
15
28800 bps
16
38400 bps
17
57600 bps