User Manual
73M2901CE AT Command User Guide UG_2901CE_027
22 Rev. 2.0
4.4.2 S1 – Ring Count
(Default = 0)
When the modem is set for Auto-Answer, registe r S1 keeps track of the number of times the phone ring s.
After the end of ring-on time, the S1 register is reset to 0 after the maximum of S54 or S58 seconds,
which ever is less. Range is 0 - 255 ring s.
4.4.3 S2 – Escape Code Character
(Default = 43)
The S2 register contain s the ASCII value of the Escap e Command character. The default is 43, which is
the ASCII “+”. If you select a value greater than 127, the Escape feature is disabled and you cannot
switch from the Data State to Comman d State while maintaining your data connection. Range is 0 – 127
(ASCII). Default is 43 (+).
4.4.4 S3 – Carriage Return Character
(Default = 0Dh)
The S3 register contains the ASCII value of the carriage return character. This character terminates both
the command line and the result codes. Range is 0 – 127 (ASCII). Default is 13 (carriage retu rn).
4.4.5 S4 – Line Feed Character
(Default = 0Ah)
The S4 register contain s the ASCII value of the line feed chara cter. It is used only when verbose result
codes (V1) are sele cted. If you do not want a line feed to be automatically sent after the return following
a verbal result code set this value to 0. Range is 0 – 127 (ASCII). Default is 10 (line feed).
4.4.6 S5 – Backspace Character
(Default = 08h)
The S5 register contain s the ASCII value of the backspace chara cter. Do not set S5 to ASCII 33 to 126
(ASCII printable characters) or to greater than ASCII 127. Range is 0 – 32 and 127 (ASCII). Default is 8
(backspace).
4.4.7 S6 – Wait to Blind Dial
(Default = 2)
The S6 register set s the nu mber of seconds the modem waits before blind dialin g. Range is 1 - 25
(seconds). Resolution is 100ms.
4.4.8 S7 – Wait For Carrier After Dialing
(Default = 50)
The S7 register perform s two fun ction s. It sets the maximum time between dialing and responding to an
incoming carrier signal. It also sets the duration of the pause generated by the W dial string modifier.
Range is 1 -254 (seconds).