DVR as a base of securty system

Recently I found very interesting application of DVR (Digital Video Recorders) – security and surveillance applications. The Linux-based Network Advanced Video Surveillance – Embedded (NAVS-E) DVRs support 4, 8, or 16 cameras, and offer simultaneous remote recording/playback/monitoring through Windows client and management software.
Additional features:
- 240 fps recording (8 and 16 channel), and 120 fps recording (4 channel)
- Supports up to three internal hard drives
- Embedded Linux OS for maximum stability
- Selectable single or multichannel view for live playback
- Enhanced MPEG-4 — average frame size is 1KB to 2.5KB
- Various interfaces — keypad; handheld controller; USB mouse
- VGA video output — up to three user-defined spot monitor outputs
- Static/dynamic network config
- Backups via built-in CD-RW, USB storage devices, or via the network
- Email notification with an image clip when alarming
- Multi-site client software — 64 channel SMS (server management software)
- eMapping on SMS
- Fast networking, user friendly PC-based remote software
- NTSC/PAL auto-detectable
[via Linux devices]