Figure 4-1: Adt-Udact Phone Connectors And Leds; Normal Mode Operation - ADT -UDACT Product Information

Primary Active
32
Modem
LED

Figure 4-1: ADT-UDACT Phone Connectors and LEDs

4.1.3 Normal Mode Operation:

Normal mode is the standard mode of operation. In this mode, the ADT-UDACT
monitors host FACP status, power input, EIA-485 communications and telephone line
voltage.
The four character 7-segment display is normally off and does not annunciate events
that are being transmitted. The display will only annunciate ADT-UDACT trouble
conditions in the normal mode.
The ADT-UDACT transmits zone/point and system status reports to a Central Station
via the public switched telephone network. Two supervised telephone line
connections are made to interface the ADT-UDACT to the telephone lines.
The ADT-UDACT 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, the 4 character display will show either 'no 1' or
'no 2' (depending upon which telephone line has the fault. 'no 1' = Primary Line, 'no 2'
= Secondary Line) and the trouble condition will be reported to the Central Station
over the remaining good phone line.
The ADT-UDACT comes with line seizure capability provided for both the primary
and secondary telephone line interfaces. Any time that the ADT-UDACT needs to
make a call to the Central Station, line seizure will disconnect any local premises
phones sharing the same telephone line.
All transmission to the Central Station 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.
Document 50934 Rev B
Primary
Secondary
Line Line
5/15/00 PN 50934:B
Secondary
Active
LED
Kiss-Off
LED