S-Parameters ...........................................................................................................................................................3-77
AT=x - Write to Selected S-Parameter................................................................................................3-77
AT? - Read Selected S-Parameter ......................................................................................................3-77
Sn - Read/Write S-Parameter.............................................................................................................3-78
3.3.1 Factory Defaults........................................................................................................................................3-78
3.3.2 S-Parameter Definitions ............................................................................................................................3-78
S0 - Number of Rings to Automatic Answer ......................................................................................3-78
S1 - Ring Counter ..............................................................................................................................3-78
S2 - Escape Character.......................................................................................................................3-79
S3 - Line Termination Character ........................................................................................................3-79
S4 - Response Formatting Character .................................................................................................3-79
S5 - Command Line Editing Character ...............................................................................................3-79
S6 - Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial Modifier ....................................3-80
S7 - Wait Time For Carrier After Dial, For Silence, or For Dial Tone After “W” Dial Modifier ...............3-80
S8 - Pause Time For Dial Delay..........................................................................................................3-80
S10 - Lost Carrier To Hang Up Delay .................................................................................................3-81
S11 - DTMF Tone Duration ................................................................................................................3-81
S12 - Escape Prompt Delay (EPD) .....................................................................................................3-81
S18 - Test Timer ...............................................................................................................................3-81
S29 - Flash Dial Modifier Time...........................................................................................................3-81
S30 - Disconnect Inactivity Timer ......................................................................................................3-82
S46 - Data Compression Control .......................................................................................................3-82
S95 - Extended Result Codes Control ................................................................................................3-82
S-Parameters
The supported S-Parameters are summarized in Table 3-14.
Table 3-14. S-Parameter Summary
Register Function Units
S0 Number of Rings to Automatic Answer rings
S1 Ring Counter rings
S2 Escape Character ASCII
S3 Line Termination Character ASCII
S4 Response Formatting Character ASCII
S5 Command Line Editing Character ASCII
S6 Wait Time for Dial Tone Before Blind Dialing, or After “W” Dial
Modifier
s
S7 Wait Time For Carrier After Dial, For Silence, or For Dial Tone
After “W” Dial Modifier
s
S8 Pause Time for Dial Delay Modifier s
S10 Carrier Loss Disconnect Time 0.1 s
S11 DTMF Tone Duration 0.001 s
S12 Escape Prompt Delay 0.02 s
S18 Test Timer s
S29 Flash Dial Modifier Time 10 ms
S30 Disconnect Inactivity Timer 10 s
S46 Data Compression Control -
S95 Result Code Messages Control -
AT=x - Write to Selected S-Parameter
This command writes the value x to the currently selected S-Parameter. An S-Parameter can
be selected by using the ATSn command. All of the S-Parameters will return the OK response
if x is a number. Some registers may not be written due to country specific PTT limitations.
Syntax
S=x
Result Codes
OK For all arguments.
AT? - Read Selected S-Parameter
This command reads and displays the selected S-Parameter. An S-Parameter can be selected
by using the ATSn command.
Syntax
S=?
Result Codes
OK For all arguments.
ATS7 establishes S7 as the last accessed register.
AT=40 sets the contents of the last register accessed to 40.
ATS=20 sets the contents of the last register accessed to 20.
S-Parameter Definitions
S0 - Number of Rings to Automatic Answer
S0 sets the number of the rings required before the modem automatically answers a call.
Setting this parameter to zero disables auto-answer mode.
Range: 0-255 rings
Default: 0
S1 - Ring Counter
S1 is incremented each time the modem detects a ring signal on the telephone line. S1 is
cleared if no rings occur over an eight second interval.
Range: 0-255 rings
Default: 0
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