Simultaneous Data Transfers
Central Station Communications
DACT-UD PN 51899:B1 1/25/05
41
SECTION 4
Central Station Communications
The DACT-UD transmits zone and system status reports to Central Stations via the pub-
lic switched telephone network. Two supervised telephone line connections are made
to interface the DACT to the telephone lines. Two optional 7 foot telephone cords are
available for this purpose and can be purchased separately.
The control panel supervises both telephone lines for proper voltage. A delay of two
minutes will occur before a fault in either phone line connection is reported as a trouble.
When a fault is detected, an audible trouble signal will sound, the yellow trouble LED
will blink, the display will show a DACT communication trouble and the trouble
condition will be reported to the Central Station over the remaining operational phone
line.
The DACT-UD comes with line seizure capability provided for both the primary and
secondary telephone line interfaces. Any time that the control panel needs to make a
call to a Central Station, line seizure will disconnect any local premises phones sharing
the same telephone line.
All transmissions to the Central Stations will be sent over the primary phone line. In
the event of noisy phone lines, transmissions will be sent over the backup secondary
phone line.
Two phone numbers must be programmed, the primary Central Station phone number
and the secondary Central Station phone number. All system reports will be transmitted
to the primary Central Station phone number. Reports will automatically be sent to the
secondary Central Station phone number if attempts to transmits to the primary Central
Station phone number are unsuccessful. Note that as an option,
all
reports may also be
sent to the secondary Central Station phone number.
The DACT-UD installed on the MS-9600 meets NFPA 72 National Fire Code reporting
requirements for: (a) the type of signal, (b) condition and (c) location of the reporting
premises. The general priority reporting structure is:
1. Zone Alarms and Restores
2. Zone Troubles and Restores
3. System Troubles and Restores
4. 24-hour Test