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S-REGISTERS
Below follows a description of the S-registers and its different components. Note that some
parameters can not be changed due to local PTT-regulations in different countries. Where nothing
else is stated the registers are stored by using the AT&W command. Some registers are read only
registers and can not be changed from the DTE.
S0 – Number of Rings to Auto-Answer
Sets the number of the rings required before the modem automatically answers a call. Zero disables
auto-answer mode.
Default 2 {0..255} Affected by country setting.
Please also refer to S1.
S1 – Ring Counter (Read only register)
Incremented each time the modem detects a ring signal. Cleared if no rings occur after a short period
of time.
Please also refer to S0.
S2 – Escape Character
S2 holds the decimal value of the ASCII character used as the escape character. The default value
corresponds to an ASCII '+'. A value over 127 disables the escape process, i.e., no escape character
will be recognised.
Default 43 (+) {0..255} ASCII decimal.
S3 – Carriage Return Character (Not stored with the AT&W command!)
Sets the command line and result code terminator character..
Default: 13 (Carriage Return) {0..127} ASCII decimal.
S4 – Line Feed Character (Not stored with the AT&W command!)
Sets the character recognised as a line feed.
Default 10 (Line Feed) {0..27} ASCII decimal.
S5 – Backspace Character (Not stored with the AT&W command!)
Sets the character recognised as a backspace. The modem will not recognise the Backspace character
if it is set to a value that is greater than 32.
Default 8 (Backspace) {0..32} ASCII decimal.
S6 – Wait Time for Dial Tone
Sets the length of time, in seconds, that the modem will wait before starting to dial after going off-
hook when blind dialling.
Default 2 {2..255} seconds.
S7 – Wait Time For Carrier After Dial
Sets the length of time, in seconds, that the modem will wait for carrier before hanging up.
Default 50 {1-255} seconds.
S8 – Pause Time For Dial Delay
Sets the time, in seconds, that the modem must pause when the `,` dial modifier is encountered in the
dial string.
Default 2 {0-255} seconds.
S9 – Carrier Detect Response Time
Sets the time, in tenths of a second, that the carrier must be present before the modem considers it
valid.
Default 6 (0.6 second) {1-255} tenths of a second.
Summary of Contents for TD-22 AC
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