MultiModemDSVD User Guide | 4 AT Commands, |
S-Registers
Certain modem values, or parameters, are stored in memory locations called S- registers. Use the S command to read or to alter the contents of
Register | Unit | Range | Default | Description |
S0 | 1 ring | 0, | 1 | Sets the number of rings before the mo- |
|
|
|
| dem answers. ATS0=0 disables autoan- |
|
|
|
| swer completely. |
S1 | 1 ring | 0 | Counts the rings that have occurred. | |
S2 | decimal | 43 (+) | Sets ASCII code for the escape sequence | |
|
|
| character. Values greater than 127 disable | |
|
|
|
| escape. |
S3 | decimal | 13 (^M) | Sets the ASCII code for the carriage return | |
|
|
|
| character. |
S4 | decimal | 10 (^J) | Sets the ASCII code for the line feed char- | |
|
|
|
| acter. |
S5 | decimal | 8 (^H) | Sets the ASCII code for the backspace | |
|
|
| character. Values greater than 32 disable | |
|
|
|
| backspace. |
S6 | seconds | 2 | Sets the time the modem waits after it goes | |
|
|
|
| |
|
|
|
| phone number. |
S7 | seconds | 50 | Sets the time the modem waits for a carrier | |
|
|
|
| signal before aborting a call. Also sets the |
|
|
|
| wait for silence time for the @ dial modifi- |
|
|
|
| er, and the time the modem waits for the |
|
|
|
| dial tone after encountering W in the dial |
|
|
|
| string. |
S8 | seconds | 2 | Sets the length of a pause caused by a | |
|
|
|
| comma character in a dialing command. |
S9 | 100 ms | 6 | Sets the time, in tenths of a second, that | |
|
|
|
| the carrier must be present before the mo- |
|
|
|
| dem considers it valid. |
S10 | 100 ms | 14 | Sets how long a carrier signal must be lost | |
|
|
|
| before the modem disconnects. |
S11 | 1 ms | 95 | Sets spacing and duration of dialing tones. | |
S12 | 20 ms | 50 | Defines the maximum period, in fiftieths | |
|
|
|
| of second, allowed between receipt of the |
last character of the three escape character sequence from the computer and the sending of the OK result code to the computer. (Escape code guard time).
46 |