User guide

DETEXI NVR 8 - 169
NVR Underlying Structure
The underlying structure of the DETEXI NVR software
consists of many individual services, which allow execute
and organize all the tasks it is responsible for. The services
are registered with Windows as Services; some are
configured as automatic by default.
Knowing the responsibility of each service is important.
This allows users to make sure the necessary services for
the given application are running and controlled properly,
while unnecessary services are turned off to preserve
system resources.
The DETEXI NVR can be considered as an intelligent
storage and authentication server for the Remote DETEXI
Clients with virtually unlimited number of IP video/audio
suppliers (such as IP-cameras and video servers) logically
attached to it.
• Any attached device can be used by the NVR.
Video/audio source or sources of the remote
events (motion events or remote I/O port events)
are examples of attached devices.
1. NVR Services
Monitor service is an internal service to start/stop other DETEXI NVR services. It is also responsible for
monitoring the health and status of all NVR Services.
Server service authenticates remote users connected to the NVR through the Remote DETEXI Clients. It is
also responsible for tracking statistics about the remote user’s connections.
Recorder service records information and images from each video input into the NVR archive, according to
the configured schedules, preferences, alarms and events.
FTP Server service receives images from cameras via FTP and writes them into the NVR archive. It also
raises an alarm when such images are received from a camera, and can also be used for FTP notification
of IP address changes from the camera to the NVR.
Check Drive service monitors the condition of the storage path and device to confirm existence and
available space for new video being recorded to the archive.
Check Alive service monitors if camera is online and video inputs are active.
Check Alarm service monitors the hard inputs of connected video devices, and raises alarms when defined
changes are seen on such inputs.
Tour service moves PTZ cameras through a predefined series of locations according to defined schedules
or on alarms or events.
Get Shots service captures still shots related to alarms from streaming video, when configured, and stores
them in a special location in the archive.
Port Mapper service, when configured, routes network requests between two network connections on
different subnets or networks. This allows for separate security and corporate networks across which the
DETEXI system can communicate.