Glossary

Term	Description
Timezone	Time periods that control devices. Examples of how they are used are to allow or deny physical card holder access to doors based on time of day, day of week, or on a holiday. They are often used to unlock a main facility entrance from the opening of the business day to the close of business.
Transient	Any increase or decrease in the excursion of voltage, current, power, heat and so forth, above or below a nominal value that is not normal to the source.
Twisted Pair	A cable that consists of one or more pairs of insulated wires that are twisted around one another. Twisted pair is often specified for circuits carrying data.
UNC	UNC path Universal/Uniform Naming Convention. A UNC path describes the location of a volume, directory, or file. The format for a UNC path is \\server\volume\directory\file and is not case-sensitive. For example: \\Shared1_svr\Shared1\WGroups\Network\Orders.xls Rather than describe the location of a file or directory by drive letter, the Network Group will typically communicate a UNC path to describe the actual location of a file or directory. Windows drive letter mappings are arbitrary, whereas a UNC path is specific and applies to all operating systems. Note: The UNC method started with the UNIX operating system. UNIX uses the forward-slash character as a path separator. Many network services (ex. FTP) have their origins in the UNIX operating system, so they use forward-slashes instead of the backslashes that DOS/Windows uses. It is important to recognize this distinction when using these services.
UNC Path	UNC path Universal/Uniform Naming Convention. A UNC path describes the location of a volume, directory, or file. The format for a UNC path is \\server\volume\directory\file and is not case-sensitive. For example: \\Shared1_svr\Shared1\WGroups\Network\Orders.xls Rather than describe the location of a file or directory by drive letter, the Network Group will typically communicate a UNC path to describe the actual location of a file or directory. Windows drive letter mappings are arbitrary, whereas a UNC path is specific and applies to all operating systems. Note: The UNC method started with the UNIX operating system. UNIX uses the forward-slash character as a path separator. Many network services (ex. FTP) have their origins in the UNIX operating system, so they use forward-slashes instead of the backslashes that DOS/Windows uses. It is important to recognize this distinction when using these services.
Volt (V)	A unit of electromotive force, It is the difference of potential required to make a current of one ampere through a resistance of one ohm.
Voltage	The term most often used (in place of electromotive force, potential, potential difference or voltage drop) to designate electrical pressure that exists between two points and is capable of producing between the two points.
Voltage drop	Voltage loss experience by electric circuit due to two principal factors: (1) wire size and (2) length of wire runs.
Zone	A portion of a large protected area.