Chapter 3 - AT Commands, S-Registers, and Result Codes
S-Registers
S0= | 0 | - 255 000 | S0 sets the number of the rings required before the modem | |
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| automatically answers a call. Set S0=0” to disable |
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| mode. |
S1= | 0 | - 255 000 | S1 counts the incoming rings and stores the value to this register. | |
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| The value of this register is incremented with each ring. If no rings |
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| occur over an 8 sec. interval, this register is cleared. User can read |
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| but should not change this value. |
S2= | 0 | - 255 043 | S2 holds the decimal value of the ASCII character used as the | |
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| escape character. The default value (043) corresponds to an ASCII |
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| character “+”. A value of 128 to 255 disables the escape process |
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| (i.e., no escape character is recognized). |
S3= | 0 | - 127 013 | S3 holds the decimal value of the Carriage Return <CR> character | |
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| used as the command line and result code terminator. Pertains to |
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| asynchronous operation only. |
S4= | 0 | - 127 010 | S4 holds the decimal value of the character recognized as a line | |
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| feed. The line feed control character is output after the carriage |
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| return control character if verbose result code are used. |
S5= | 0 | - 32, | 127 | S5 holds the decimal value of the character recognized as a |
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| backspace. The modem will not recognize the backspace character |
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| if this register is set to a value greater than 32008. |
S6= |
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| S6 sets the length of time, in seconds, that the modem must wait |
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| (minimum 2 seconds even if the value is less than 2) after going off- |
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| hook before dialing the first digit of the telephone number. |
S7= |
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| S7 sets the time, in seconds, that the modem must wait before |
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| hanging up because carrier is not detected |
S8= | 0 | - 65 | 002 | S8 sets the time, in seconds, that the modem must pause when the |
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| “,” dial modifier is encountered in the dial string. |
S10= | 1 | - 255 020 | S10 sets the length of time, in tenths of a second, that the modem | |
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| waits before hanging up after a loss of carrier. |
S11= | 50 - 150 095 S11 sets the DTMF duration and inter digit delay. Sets the duration | |||
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| and spacing, in |
S28= | 0 | - 255 001 | V.34 modulation enable/disable: | |
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| 0: disabled |
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| 1- 255: enabled |
S30= | 0 | - 90 | 000 | Inactivity timer. S30 sets length of time, in minutes, that the modem |
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| counts when there is no data flow in or out the DTE serial port. A |
connection is disengaged when the counter reaches the preset value. Set S30 =0 to disable inactivity timer. For buffer mode only.
MT5634ZLX/E | 41 |
