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Document # 50075 Rev B 3/13/95
Primary
Line Secondary
Line
Modem
LED
Primary Active
Kiss-Off
LED
Secondary
Active
LED
4.1.3 Normal Mode Operation: Normal mode is the standard mode of operation. In
this mode, the UNI•COM 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 UNI•COM trouble
conditions in the normal mode.
The UNI•COM 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 UNI•COM to the telephone lines.
The UNI•COM 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 UNI•COM comes with line seizure capability provided for both the primary and
secondary telephone line interfaces. Any time that the UNI•COM 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.
Options exist to: (1) send reports to the secondary phone number as backup only, (2)
send reports to either the primary or secondary phone numbers or (3) send reports to
the primary phone number only. For additional information, refer to programming
address 55. If 10 total attempts to communicate are unsuccessful, the Communicator
Failure output will be turned on (TB3, terminal 2).
Figure 4-1: UNI•COM Phone Connectors and LEDs