DPS KDA 864, User Manual

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4.7
APPENDIX
Modem -
The abbreviation for Modulator/Demodulator. Modems are used to trans-
fer data over telephone lines.
Optically Isolated -
Electrical interface, such as a discrete alarm point input, that isolates the
external circuitry from the internal circuitry of the KDA with an optical
coupler. Optical Isolation reduces the possibility of electrical mis-match or
interference between the KDA and the alarm sources.
Point -
The smallest unit on the line that can be monitored. It is therefore an alarm
in itself.
Polarity -
The polarity of a point can be either Normal (NRM) or Reverse (RVS).
Normal polarity is current flow in a closed circuit for an alarm.
Primary Pad -
Location of the docking module for the primary communications port. The
Primary communications port will be used by the KDA to report all
alarms, unless it is unequipped. If the Primary port fails to communicate
properly, the KDA will switch to the secondary pad, if equipped. (see
Docking Module)
Protocol Analyzer -
A diagnostics mode in which the absolute hex bytes (hexadecimal), going
to and from a particular channel, are displayed.
@SUBHEAD II = Qualification Time -
The Qualification Time is the amount of time an alarm must stand in an
“alarm state” before the KDA will perform an action.
D-SW-709 UM00C.08103
October 22, 2001 www.dpstele.com