Digital video recorders allow you to view live footage, store video data, and track anything using video management software or a web browser on any remote or local computer over a network and it also connects your Smartphone for live viewing through internet. Analog Camera & HD Camera usually these two types has been using as recorder. With this technology using 3+1 Coax Cable maximum 100 meters of transmission range can be possible for one camera.
An NVR is a Network Video Recorder. It is a network attached computer system that includes video management and recording software, the computer and the hard drive storage. Video output quality, Resolution is far better form DVR Surveillance System. With POE Switch one IP camera can be used in a range of 25o meters using CAT 5 or CAT 6 Network Cable.
Time and attendance systems (TNA) are used to track and monitor when employees start and stop work. A time and attendance system enables an employer to monitor their employees working hours and late arrivals, early departures, time taken on breaks and absenteeism. It also helps to control labour costs by reducing over-payments, which are often caused by paying employees for time that are not working, and eliminates transcription error, interpretation error and intentional error. TNA systems can also be used to ensure compliance with labour regulations regarding proof of attendance.
Video door-phone (also known as video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that it enables the person indoors to identify the visitor and, if they wish, engage in conversation and/or open the door to allow access to the person calling.
These cameras are ultra-high definition cameras. It can zoom with utmost clearity. It mainly used in banks, casinos.
These cameras compress the bandwidth and transmit images over the internet. They are present in both the forms: wireless as well as hardwired. Installation is easier in IP cameras as they don’t require a different cable run or power support to send pictures over longer distance.