HAI OMNI IIe, Installation Manual, Page: 39 / 74

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DESCRIPTION OF 4/2 FORMAT
The 4/2 format consists of a four-digit account code, from 0000 to FFFF and a two-digit alarm code from 00 to FF. When the
digital communicator calls the central station receiver, the latter answers and sends a brief 2300 Hz tone or a 1400 Hz tone called
a "Handshake" tone. The digital communicator then reports digits of the account and alarm codes as bursts of either (1800 Hz) or
(1900 Hz) tone; the digit 8 is represented by eight bursts of tone. A message, or "round" consists of an account code and an alarm
code. Two rounds are sent, and two consecutive rounds must match at the receiver. If they do, the central station receiver sends
another brief 2300 Hz or 1400 Hz tone to acknowledge to the digital dialer that the message has been properly received. If the
rounds don't match, the receiver does not send the second tone and the digital dialer tries again, up to 5 times. If the rounds are
not acknowledged after 5 tries, the digital dialer hangs up and tries the entire call again.
The digital communicator can report alarm zone trips, alarm cancels, low battery, and fire zone trouble. It may also be setup to
generate an automatic test signal at periodic intervals. The communicator may be setup to call second phone number using a
second account number in the event that it is unable to communicate successfully using the first phone number and account.
The digital communicator is setup at the factory to transmit a code when the battery is low or trouble with the fire zone is
detected. If these codes are set to 0 or 00, no code will be sent when the trouble condition is detected.
Although the alarm codes can be changed, we recommend that the alarm codes setup at the factory be used to minimize the risk of
installer error in programming the digital communicator. Simply enter the phone numbers and account codes, then verify the
alarm codes.
3/1 FORMAT
Older central stations may require a 3/1 format. To use 3/1 format, both account numbers must be changed to 3 digit codes and
EVERY alarm code must be changed to a 1-digit code. Do not mix code lengths!
OPENING AND CLOSING REPORTS
The Omni IIe system can send opening and closing reports by user to the central station.
When the system is disarmed by user code 1-16, the communicator can call the central station and report that the system was
disarmed (opened) with the user code that was used.
When the system is armed by user code 1-16, the communicator can call the central station and report that the system was armed
(closed) with the user code that was used.
If any other code or a method disarms the system (i.e. Keyswitch or Scheduled Program), the communicator will send a generic
OPEN report to the central station. The code that is sent is defined as OTHER OPEN. If the system is armed by any other
method other than one that requires a code (i.e. Quick Arm, Keyswitch, or Scheduled Program), the communicator will send a
generic CLOSE report to the central station. The code that is sent is defined as OTHER CLOSE.