Vivotek NR7401 Manual de usuario descargar pdf (Pagina 9)

Chap.1 IP Surveillance Overview

Figure 1.8 Video server

1.3 Video Servers

A video server is a device that converts analog signals to digital, allowing users to migrate to a digital surveillance

system without replacing existing CCTV systems.

A video server mainly includes a compression chip and an Ethernet chip, with two main types available: one port or

four ports.

Speed Dome Type

Comparedwithxeddometype,aspeeddomenetworkcameraisintegratedwithpan,tiltandzoomcapabilities,

enablingafargreatereldofview.Withahighzoomcapability,imagestabilizationand360-degreeendlesspan,a

speed dome camera is mainly used for professional applications, such as airports, banks or city security.

Fixed Dome Type

A fixed dome network camera, mostly designed for indoor surveillance, has a housing to make the object of

interest less aware of where the camera is pointing at. With a 3-axis mechanism, images can remain in an upright

orientationwhenitisinstalledeitheragainstthewalloronthe ceiling.Furthermore,thedesign ofaxeddome

networkcameracanbettertinwiththe decor.

Axeddomenetworkcameracanbefurnishedwithaweather-orvandal-proofhousingforoutdoorapplications.

Figure 1.7 Speed dome network camera

Figure 1.6 Fixed dome network camera

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Vivotek NR7401 Manual de usuario Pagina 9