The modem responds to the following ATS command options.
The letters AT (or at) must precede all commands except A/ and +++. Factory-default options are underlined.
S-Register |
Option |
Description |
S0 |
|
Auto-Answer on Ring Number |
|
S0=0 |
Disable |
|
S0=n |
Answer on Ring n; n=0 to 255 |
S1 |
|
Ring Count |
|
S1=n |
Counts the number of rings in an incoming call. If the modem is configured to auto-answer (S0 set to a non-zero option), when S1=S0, the modem answers the call. |
S2 |
|
Select Escape Character |
|
S2=n |
Specifies ASCII character for Escape; n=0 to 255. Default = 43 (+) |
S3 |
|
Select Carriage-Return Character |
|
S3=n |
Specifies ASCII character for Carriage-Return; n=0 to 127. Default = 13 (CR) |
S4 |
|
Select Line-Feed Character |
|
S4=n |
Specifies ASCII character for Line-Feed; n=0 to 127. Default = 10 (LF) |
S5 |
|
Select Backspace Character |
|
S5=n |
Specifies ASCII Character for Backspace; n=0 to 127. Default = 8 (BS) |
S6 |
|
Blind Dial |
|
S6=n |
Before dialing, the modem goes off-hook and waits n seconds; n=0 to 255. Note: When the ATX2 or ATX4 option is in effect, the S6 value is disregarded. Default = 2 |
S7 |
|
Call Time-out |
|
S7=n |
Number of seconds in which connection must be established or call will be disconnected; n=1 to 255. Default = 60 |
S8 |
|
Pause Delay |
|
S8=n |
Pause for n seconds; n=0 to 255; for dial modifier in a dial string. Default = 2 |
S10 |
|
DCD Loss Disconnect |
|
S10=n |
Disconnect after n seconds; n=0 to 255 in 0.1 second increments; after DCD signal is de-asserted. Default = 14 |
S11 |
|
Tone Length |
|
S11=n |
Specifies duration, in 0.001 second increments, of DTMF tone when it is generated; n=60 to 255. Default =72 |
S12 |
|
Escape Code Guard Time |
|
S12=n
|
Specifies the interval, in 0.02-second increments, that must be present on either side of the escape code (+++) for the modem to recognize the escape command and enter command mode. If S12=0, the speed at which you enter the escape sequence is not a factor. Default = 50 |
S18 |
|
Test Timer |
|
S18=n |
Specifies test execution duration; n=0 to 255. Default = 0 |
Table 1: ATS (S-Register) Commands