the modem will wait for dial tone when encountering a “W” dial modifier before
continuing with the next dial string parameter.
Range: 1-255 seconds
Default: 50
S8 - Pause Time For Dial Delay
S8 sets the time, in seconds, that the modem must pause when the “,” dial modifier is
encountered in the dial string.
Range: 0-255 seconds
Default: 2
S10 - Lost Carrier To Hang Up Delay
S10 sets the length of time, in tenths of a second, that the modem waits before hanging up
after a loss of carrier. This allows for a temporary carrier loss without causing the local
modem to disconnect. When register S10 is set to 255, the modem functions as if a carrier is
always present.
The actual interval the modem waits before disconnecting is the value in register S10 minus
the value in register S9. Therefore, the S10 value must be greater than the S9 value or else the
modem disconnects before it recognizes the carrier.
Range: 1-255 tenths of a second
Default: 14 (1.4 seconds)
S11 - DTMF Tone Duration
S11 sets the duration of tones in DTMF dialing. This value has no effect on pulse dialing.
Range: 50-255 milliseconds
Default: 95 (95 milliseconds)
S12 - Escape Prompt Delay (EPD)
S12 defines the maximum period, in fiftieths of a second, allowed between receipt of the last
character of the three escape character sequence from the DTE and sending of the OK result
code to the DTE. If any characters are detected during this time, the OK will not be sent. Note
that sending of the OK result code does not affect entry into command mode. (See 3.1.3.)
Range: 0-255 1/50 of a second
Default: 50 (1 second)
S18 - Test Timer
S18 sets the length of time, in seconds, that the modem conducts a test (commanded by &T1)
before returning to the command mode. If this parameter value is zero, the test will not
automatically terminate; the test must be terminated from the command mode by issuing an
&T0 or H command. When S18 is non-zero, the modem returns the OK message upon test
termination.
Range: 0-255 seconds
Default: 0
S29 - Flash Dial Modifier Time
S29 sets the length of time, in units of 10 ms, that the modem will go on-hook when it
encounters the flash (!) dial modifier in the dial string. The time can be limited as it is a
country dependent parameter.
Range: 0-255 10 ms intervals
Default: 70 (700 ms)
S30 - Disconnect Inactivity Timer
S30 sets the length of time, in tens of seconds, that the modem will stay online before
disconnecting when no data is sent or received. In error-correction mode, any data transmitted
or received will reset the timer. In other modes, any data transmitted will reset the timer. The
