Black Box 3600 Pause Interval for Comma S8, Carrier Detect Time S9, Lost Carrier Detect Time S10

Status Registers

Pause Interval for Comma S8

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).

Carrier Detect Time S9

S9 contains the amount of time (0-255) in 0.1 second increments that the carrier must be present to be recognized. The default value is 6

(0.6 second). This timer can be extended to lessen the likelihood of false detection of carrier.

Lost Carrier Detect Time S10

S10 contains the amount of time (0-255) in 0.1 second increments that the carrier must be absent to be recognized as a loss of carrier. The default value is 14 (1.4 seconds).

DTMF Tone Duration S11

S11 determines the length of DTMF tones. 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).

Escape Sequence Pause S12

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 3 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 15 and 255 may be used for S12.

10-6 Modem 3600