DIALLER OPERATION
POWER UP
When power is applied to the DT1 it will perform a self test, then flash the digit 1 five
times on the 7 segment display. While the DT1 is performing the self test but before
the 1 is displayed, the 7 segment display may show anything, this is normal.
ACTIVATION
The DT1 can be programmed to trigger from either a positive or negative going alarm
source. The key switch input can be used to cancel an alarm call and/or disable the
alarm input.
CALL SEQUENCE
Once the DT1 has been triggered, it will seize the phone line and hold it for 3 seconds
to clear any calls that may be in progress. It then waits a further 3 seconds to get a
line out before dialling a number. After dialling a phone number the DT1 plays the
user message. The DT1 repeats the user message for the programmed time and only
finishes the call at the end of a message repetition or until cancelled.
After receiving a trigger the DT1 will attempt up to 6 diallings to communicate the
alarm information (the maximum number of dial attempts can be set from 1 to 6, refer
to the MAXIMUM DIALLING ATTEMPTS section on page 9). Each programmed
phone number will be called in order until either the dialler has been shut down, or the
maximum number of dial attempts have been made. If there are less phone numbers
programmed than the max dial attempts, then the DT1 will redial the first number
followed by the second and so on, until the maximum number of dial attempts have
been made.
During the dialling of an alarm the DOT on the display will flash at a rate of twice per
second. If after dialling the maximum number of attempts the dialler has not been
cancelled, the DOT will remain on until the K/S (key switch) input state is changed
(dialler is changed between “Away/On” and “24 hour” mode) or the DT1 makes a
successful call after being triggered again. When the dialler is shutdown a “WARBLE”
sound indicating shutdown is heard over the phone line and the display dot will go off.
Should the DT1 be unable to attempt any calls because it has not been programmed
with enough information, it will display error number 5 (no phone numbers in memory)
on the seven segment display.
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