We are cosolidating video surveillance systems on our sites.
I am looking for an IP enabled DVR/NVR device that would be capable of handling video signal from different CCTV BNC analog cameras (presumably all PAL) with different resolutions CIF, DCIF etc., till max 720 x 480. from different manufacturers (Avir, Pixim, JCC, Sony, Trans Pac, Tekno, Hikvision, CP Plus etc.).
The device should be also able to connect IP ONVIF cameras and work as NVR as we switch to IP cameras continuously.
Also it should be possible to connect to multiple sites over IP network with one user-friendly interface or application with password protection and various access levels (separate access rights to view recordings and change settings). It would be nice if it allows for streaming individual cameras form our custom windows .NET app. Also the device must be capable of deleting recordings older than X days and perform network time sync.
Usually there are max. 8 cameras on sites, on some others up to 16.
So far the DAHUA S3 or NT looks promising, but I have no hands on experience with it so far.