I am planning to carry out a centralized monitoring system among the cameras fixed in DVRs that are placed in different location. Below is the list of questions I would need your help to clarify
1) In the existing system, there is a DVR recording for 16 channels. It has been fixed to store the recording data. The distance of centralize monitoring place from each DVRs location is 2km and above. For this situation, please advice on the cabling job and highlight
what type of fiber should be used to carry out the video transmission
2)I plan no more use the existing DVR system and transmit all
the analogue data to the NVR with using end coder as middle device
convert the analogue to ip signal ,please advice on this circumstance on criteria I should follow when choosing a good NVR system which will support more than a 100 of camera (static) and please let know how to calculate the storage of HDD in a NVR. (no.days:45;fps;25: hours:24 ; real recording ; resolution :Need your advice on which is the best ;channels;16)
3) Please advice me on a good brand of the CCTV surveillance system
Thank you for the kind advice and the time