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Life Safety     Property Protection

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123 A B C D E F G H I J K L M N O P Q R S T U V W Z

Glossary

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10/100 Base-T

IEEE-802.3 specification for 10 or 100Mbps Ethernet.

802.3af / at

Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras. Power may be carried on the same conductors as the data, or it may be carried on dedicated conductors in the same cable.

IEEE802.3af (15.4W per Port): The current IEEE802.3af standard for Power-over-Ethernet was formally approved in 2003, defining PoE applications requiring up to 12.95W of power. Phihong’s selection of IEEE802.3af Power-over-Ethernet midspans and splitters allow users to bring power and data to an array of devices without the expense of hiring an electrician to bring power to additional locations. Should the device that needs power such as a camera or VoIP phone not be PoE compatible, there are splitters available to separate the power and data while still eliminating the need for and expense of AC power outlets.

IEEE802.3at PoE Plus (30W per Port): POE Plus as ratified in September 2009 defines Power-over-Ethernet applications up to 25.5W per port of power. As a founding member of the IEEE task force dedicated to the development of this standard, Phihong is able to deliver a complete range of fully compliant Midspans with the most selection available on today’s marketplace. Applications include; wireless multi-radio access points, Pan Tilt Zoom security cameras with heaters, 802.11n wireless applications and IP phones with streaming video displays

Ultra PoE (60W per Port): This category though not defined by IEEE, it works within all of the safety parameters as defined for the IEEE802.3at standard. Ultra PoE has an output power of 60W to 80W per port and is designed for a much more diverse array of applications. More common applications can be found in use with computer workstations, LCD display panels, WAP arrays and complex POS systems.

Mega PoE (95W per Port): The newest addition to the Phihong PoE family is a massive 95W per port series of midspans. Phihong is the first to offer this much power combined with data over a single Ethernet cable. This new series has a large array of specialized applications that it can be used for including Kiosks, Magnetic Locks, Computer Workstations and numerous security functions including access and lighting. Though 95W is a lot of power, it still complies with UL’s Safety Extra Low Voltage specifications and all safety measures as outlined in the IEEE802.3at standard.

AAC

Advanced Alarm Control: A flexible and sophisticated alarm management subsystem that allows rules to be created that define which input(s) activate one or more outputs. In its most basic form, a rule could define which input(s) should activate which output(s). In a more complex form, a rule can be programmed to take a specific keyboard command (pre-existing or not) and perform a dome function, or any combination of the above.

ActiveX

ActiveX is a standard that enables software components to interact with one another in a networked environment, regardless of the language(s) used to create them. Web browsers may come into contact with ActiveX controls, ActiveX documents, and ActiveX scripts. ActiveX controls are often downloaded and installed automatically as required.

Address

Each unit has a numerical address in a control system in which it is located. This allows the appropriate unit to be referenced and operated with.

AF

Auto-Focus system by which the camera lens automatically focuses on a selected part of the subject.

AGC

Automatic Gain Control: The electronics that regulate the gain or amplification of the video signal. In practice image will brighten as gain is increased.

Angle

The field of view, relative to a standard lens in a 35mm still camera, expressed in degrees, e.g. 30°. For practical purposes, this is the area that a lens can cover, where the angle of view is determined by the focal length of the lens. A wide-angle lens has a short focal length and covers a wider angle of view than standard or telephoto lenses, which have longer focal lengths.

Aperture

The size of the opening in the iris, which controls the amount of light that reaches the Sensor. The larger the F-Stop number, the less light reaches the sensor. Ex: F1.2 lens can capture more light than an F3.5 lens.

ARP

Address Resolution Protocol: A protocol for mapping MAC and IP addresses. A request is broadcast on the local network to discover the MAC address for an IP address.

ASIC

Application Specific Integrated Circuit: A circuit designed for a specific application, as opposed to a general purpose circuit, such as a microprocessor.

Aspect ratio

A ratio of width to height in images. A common aspect ratio used for television screens and computer monitors is 4:3. High-definition television (HDTV) uses an aspect ratio of 16:9.

Auto Dome

Fully integrated, high speed, pan/tilt/zoom camera built into a protective dome housing allowing full and continuous 360° coverage of the scene.

Auto-Black

A technique of boosting the video signal level to produce a full amplitude video signal, even when the scene contrast is less than full range (glare, fog, mist, etc.). The darkest part of the signal is set to black and the lightest part to white, thus increasing the contrast.

Auto-Focus

The lens continuously adjusts to the correct focus automatically for the sharpest picture.

Auto-Iris

This special type of iris is electrically controlled by the camera, to automatically regulate the amount of light allowed to enter.

Auto-Pan

The camera pans continuously between right and left limit settings.

Auto-Pivot

As the camera tilts through the vertical position, the camera rotates to maintain the correct orientation of the image.

Auto-Scaling

As the camera zooms in to increase the size of objects on the monitor screen, the pan and tilt speeds are reduced so that the relative speed on the screen remains constant for similar joystick control positions.

Auto-Track

A patented technology that integrates motion detection into the camera allowing tracking of an object and zooming in to optimize size and perspective

AVI

Audio Video Interleave: A video format that supports simultaneous playback of audio and video.

AWB

Auto White Balance: A feature that allows a color camera to automatically adjust its output color to give a natural color, independent of the lighting used.

Balun

Short for Balance/Unbalanced; often referred to as a CCTV transceiver. A device that converts a balanced video signal (e.g. as used on twisted pair) line to an unbalanced signal (e.g. as used on coax). In a balanced line both wires are electrically equal. In an unbalanced line one wire has different electrical properties than the other.

Baud

Unit of measure for the speed of data transmission

Bilinx

A communications protocol that allows remote control, configuration, and updates to be performed over the video cable (Coax or Passive UTP).

Bilinx Address

The address may be set locally using the Bilinx Configuration Tool for Imaging Devices (CTFID) or remotely using the Fast Address function (see Fast Address).

Biphase

Pan/Tilt/Zoom protocol for Bosch products.

Bit rate

The bit rate (in kbit/s or Mbit/s) is often referred to as speed, but actually defines the number of bits/time unit and not distance/time unit.

Bit/s

Bits per second, the actual data rate.

Bitmap

A bitmap is a data file representing a rectangular grid of pixels. It defines a display space and color for each pixel (or “bit”) in the display space. This type of image is known as a “raster graphic.” GIF’s and JPEG’s are examples of image file types that contain bitmaps. Because a bitmap uses this fixed raster method, it cannot easily be rescaled without losing definition. Conversely, a vector graphic image uses geometrical shapes to represent the image, and can thus be quickly rescaled.

BLC

Back Light Compensation: Selectively amplifies parts of the image to compensate for large contrast differences when only a portion of the image is brightly lit (e.g. a person in a sunlit doorway).

Bluetooth

Bluetooth is an open standard for wireless transmission of voice and data between mobile devices (PCs, handheld computers, telephones and printers).

Bonjour

Also known as zero-configuration networking, Bonjour enables automatic discovery of computers, devices, and services on IP networks. Bonjour allows devices to automatically discover each other without the need to enter IP addresses or configure DNS servers. Bonjour is developed by Apple Computer Inc.

BOOTP

Bootstrap Protocol: A protocol that can automatically configure a network device (give it an IP address). BOOTP is the basis for a more advanced network management protocol, the Dynamic Host Configuration Protocol (DHCP).

Broadband

In network engineering terms, this describes transmission methods where two or more signals share the same carrier. In more popular terminology, broadband is taken to mean high-speed data transmission.

Cable Category

Application and bandwidth rating system for UTP cabling. Categories 1 through 7 are based on EIA/TIA-568-B standards. Category is typically abbreviated CAT. UTP Category 5, 5e, 6, and 7 are used for Ethernet data cabling applications. Standard Ethernet wiring distances are limited to a maximum of 100 m (328 ft.) when using UTP wiring.