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7.2.10 P
I
AUSE
NTERVAL FOR
When a dial command contains a comma, the modem pauses the number of seconds in S8. Change S8 to
change the basic pause interval (0-255), or use several commas in a row for greater delay during dialing.
The default value is 2 (seconds).
7.2.11 C
D
ARRIER
ETECT
Amount of time (0-255) in 0.1-second increments the carrier must be present to be recognized. The
default value is 6 (0.6 second). Data Carrier Detect (DCD) will be raised when carrier is recognized. This
timer can be extended to lessen the likelihood of false detection of carrier.
7.2.12 L
C
OST
ARRIER
Amount of time (0-255) in 0.1-second increments needed to recognize the loss of carrier. Data carrier
detect (DCD) will be dropped when the loss of carrier is recognized and the modem disconnects. The
default value is 14 (1.4 seconds).
If S10 is less than S9, any loss of carrier results in a disconnect. When S10 is larger than
S9, the length of time that a carrier loss can be tolerated is the difference between S10 and
S9.
7.2.13 DTMF T
D
ONE
Determines the length of DTMF tones in 1-ms increments. The period of silence is equal to the duration
of the tone. The value of this register must be entered in multiples of 10. Default value is 80 (80 ms).
7.2.14 E
S
SCAPE
EQUENCE
Using the escape sequence to return to command mode from data mode requires two pauses, one before
and one after the escape characters.
The pauses prevent the modem from responding to a character sequence which might contain the
escape sequence as part of its normal data transmission.
S12 contains the pause interval in 0.02-second increments. The factory setting is 50, equivalent to 1
second (50 x 0.02 sec). When S12 is 0, timing is not a factor.
The timing between the three escape characters must be less than the pause interval, or the escape
sequence will not be detected. The data rate also affects the timing and must be taken into account when
changing the pause interval.
To disable the escape command, set S2 to a value greater than 127 instead of changing S12. Values
between 0 and 255 may be used for S12.
7.2.15 S13
Not used
When S-registers have parallel AT commands, the commands are listed in the register
tables as a cross reference. If no command exists for the option, the column is left blank.
C
(S8 = 0-255)
OMMA
T
(S9 = 0-255)
IME
D
T
(S10 = 0-255)
ETECT
IME
(S11)
URATION
P
I
(S12 = 0-255)
AUSE
NTERVAL
NOTE
NOTE
CHAPTER 7: Status Registers
9 9
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