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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.
Values inside {..} describes the valid interval and the unit is written inside parenthesis ().
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).
Please also refer to S12, ATO.
S3 – Carriage Return Character
(Not stored with the AT&W command!)
Sets the command line and result code terminator character.
Default
13
(CR) {0..127} (ASCII decimal).
Please also refer to S4.
S4 – Line Feed Character
(Not stored with the AT&W command!)
Sets the character recognised as a line feed.
Default
10
(LF) {0..127} (ASCII decimal).
Please also refer to S3.
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
(BS) {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
3
{0..255} (seconds). Affected by country setting.
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). Affected by country setting.
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).
