Specifications

October 8, 2003 Networking Alpha Signs (9700-0112C)
80 Glossary
A protocol in the TCP/IP suite that governs character-oriented terminal traffic.
Termination
Stopping the flow of communication using a special end-of-line (EOL) terminator that plugs into the sign’s
RS232/RS485 port. Used when an Alpha sign is at the end of an RS485 network.
through hole
A hole in the casing of a sign through which wiring is brought to connect a device.
ticker
An electronic sign that combines text and graphics to convey a fixed or changeable, moving or unmoving
advertising or locational message. Primarily used to display financial data. See also electronic display.
topology
The physical design or layout of network components (cables, stations, gateways, and hubs). Three basic
interconnection topologies are star, ring, and bus networks. The flow of data differs in each topology.
transparent
A description of a function that operates without being evident to the user or software application.
tri-color
Capable of red, green, and amber colors.
trigger
Cause or initiate an action.
tune file
Pre-programmed sounds file that can be attached to a message and sent to a sign equipped with speakers in
AlphaNET software.
UL
Underwriters Laboratory. Creates testing standards for safety (electrical, shock, fire hazards, and so on).
Domestic and International. A product tested for safety by UL has a UL label.
update
Change to new values.
UPS
Uninterruptible Power Supply. A device that contains a battery and some circuitry to supply a computer with
power for a limited time if there is an interruption in the outlet power.
variable
Represents real-time data that can change, such as temperature or interest rates. Variables can be embedded in
messages and refreshed when the value changes, and can also be used to trigger commands for certain events to
start or stop.
ventilated
Provides circulation of external air through the enclosure to remove excess heat, fumes, and vapors.
viewing distance