Advidia "A" Series Manual de usuario descargar pdf (Pagina 44)

Firmware User Manual

DDNS

There are surveillance solutions that consist of single cameras

scattered over a wide territory, therefore each of those cameras should be connected to Internet in order

to become accessible by the video management system.

In such cases, one of the practical networking solutions is to use a DSL modem on camera site and let the

camera obtain the dynamic IP address from the Internet Service Provider through the DSL modem using

PPPoE connection, which is much more cost-effective than applying for static IP address.

However, there is one drawback in this solution – in order to do the remote surveillance from the Control

Center, the NVR Server in the Control Center has to know the address of the IP camera at all times in

order to get the video stream from the camera. If the camera’s network connection has been reset for

any reason, the camera will get a new IP address through the DSL Modem, which may be different from

the previous one. The NVR will not know about this change, and the connection between the camera and

NVR will fail.

There however exists a solution that makes sure the NVR can find the camera even if the camera IP

changes frequently. Our cameras support Dynamic DNS or DDNS service that allows frequently changing

IP be mapped to a certain unchangeable domain name. The mapping database and its updating engine

are hosted in one of the Dynamic DNS servers, most of which offer basic services for free, such as

www.dyndns.org.

Internet

Video management

system

IP Camera

DSL Modem

PPPoE Connection with Dynamic IP address

Video Stream from camera to NVR

Commands from NVR to camera’s IP address

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Advidia "A" Series Manual de usuario Pagina 44