Barnett Engineering B1277, Installation & Operation Manual, Page: 47 / 50

GLOSSARY PAGE 43
Dial Control – a function that, when enabled, delays alarm annunciation
until the recipient of the call speaks into the phone. (eg. “Hello”)
Digital Input – an input type that, when asserted, generates an alarm
condition. This input type may be configured as asserted by grounding the
input terminal, opening the input terminal, or providing a voltage to the
input terminal that crosses a 2VDC threshold.
Dipole Antenna – an RF antenna with a simple structure. The dipole
antenna included with the Cv3 is intended for indoor use only and has
limited range.
Directory – a list of callout instructions that are executed sequentially
when an alarm occurs. Each directory line may specify a telephone
number to call, a radio transmission with paging tones, or a mobile
number to send a text message to.
DTMF
– Dual Tone Multiple Frequency; a series of audible tones used for
remote command and control of equipment
ESN – see Electronic Serial Number
Electronic Serial Number – a permanent 32-bit number embedded by the
manufacturer that uniquely identifies a wireless communications device.
Group
– a means of having the alarms created by some inputs respond
differently than the others. By default, Groups are not used and all alarms
are treated the same. If groups are created, inputs may be individually
assigned to the group where separate acknowledge and interrogate codes
are defined and the directories used have unique lists of callout
instructions.
GSM – Global System for Mobile Communications - a mobile telephony
standard used by carriers such as AT&T Mobility, T-Mobile, and Rogers
Wireless.
Hysteresis – a dead zone around a low and high alarm setpoint that
requires the input to change sufficiently after creating an alarm before the
level is recognized as being normal again. The hysteresis value should be
set larger than the natural short term variations found on an analog input.
Interval Input
– an input type that measures the amount of time the input
has been asserted. Each time the input is asserted, the count is reset to
zero. When the input is de-asserted, the measured value is maintained
until the next measurement begins.