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Homepage > Products > VS-4016U-SP Pro VioStor NVR (Network Video Recorder)
VS-4016U-SP Pro VioStor NVR (Network Video Recorder)
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Selling Point

QNAP VS-4016U-SP Pro VioStor NVR (Network Video Recorder) is the high performance 1U chassis network surveillance system featuring Linux-embedded OS, Intel CPU, 1GB memory, and powerful surveillance features. It supports unique multi-server monitoring for up to 128-channel monitoring from multiple QNAP NVR servers simultaneously. The VioStor NVR houses 4 SATA hard drives to provide up to 8TB storage capacity. Moreover, the NVR supports over 800 network camera models from 36 popular brands, e.g. AXIS, ACTi, A-MTK, Arecont Vision, AVTECH, Canon, Cisco, CNB, Brickcom, DIGITUS, D-Link, EDIMAX, ELMO, EtroVision, GANZ, Hikvision, iPUX, IPX, IQeye, LevelOne, Linksys, Messoa, MOBOTIX, NAKAYO, Panasonic BB/ BL/ i-Pro, SANYO, SHANY, SONY, TOA, TOSHIBA, TRENDnet, Videosec, VIOSECURE, VIVOTEK & Y-CAM.

The VioStor NVR is a complete network surveillance solution which provides recording, real-time monitoring, and remote data access. It supports up to 16-channel megapixel recording in H.264, MxPEG, MPEG-4, or MJPEG video compression.Besides, the NVR supports diversified recording features and video search by intelligent video analytics, e.g. motion detection, missing object, foreign object, out of focus, and camera occlusion, etc. In real-time monitoring, you can select to view the channels (IP cameras) with different display modes or drag and drop to change the display order of the channels flexibly. The NVR also supports other intelligent features such as smart control of PTZ cameras, instant alarm alert, digital zoom, data search by date and time, timeline, and event. All the functions can be configured by the IE web browser.

Powerful Features of VS-4016U-SP Pro VioStor NVR (Network Video Recorder) :

  • Exclusive Linux-embedded system, Intel® Atom™ CPU and 1GB memory
  • Real-time monitoring and recording (video/ audio) from multiple network cameras (up to 16 channels)
  • Supports streaming from network cameras and servers
  • High quality H.264, MxPEG, MPEG-4, and M-JPEG recording (varied by camera models)
  • Supports recording from megapixel IP cameras (up to 8-megapixel)
  • Complete recording features: schedule recording, alarm recording, alarm recording schedule, motion-detection recording, pre-alarm, and post-alarm recordings, etc.
  • Up to 8TB storage capacity for long-term recording
  • Multi-server monitoring: Supports monitoring of up to 128 channels
  • Easy Data Search by Date & Time, Timeline, Event, Intelligent Video Analytics (IVA)
  • Remote management: access and playback recordings by web browser, FTP, and Network Neighborhood anytime, anywhere
  • Trouble-free 6-step installation
  • Smart search of IP cameras for quick configuration
  • Centralized monitoring with "Click-to-Go" PTZ control and adjustable display mode
  • Digital zoom for monitoring and playback
  • The display order of the monitoring channels can be changed by drag and drop
  • Event notification on monitoring screen
  • Real-time SMS and email alert
  • Detailed event and system logs (include users' networking services and recording data access record)
  • Schedule remote replication to NAS (Network Attached Storage) for video backup
  • Unique online user list function and access authority control
  • Multi-channel playback at different speed
  • Enhanced file security by digital watermarking
  • Automatic system startup when the power resumes after power outage
  • Ultra-high-end RAID (RAID 0/ 1/ 5/ 5+ hot spare / 6/ JBOD) to protect all the important recordings in the most secure way
  • Hot-swap hard drive design
  • Online RAID Capacity Expansion and Online RAID Level Migration
  • Two Gigabit LAN ports for failover, load-balancing, or multi-IP setting
  • Supports UPS (Uninterruptible Power Supply) for 24x7 service
  • DOM architecture with embedded fail-safe dual OS for enhanced reliability

Surveillance Features

Remote Live Monitoring, Recording and Playback
The VioStor NVR is a standalone surveillance system that supports professional grade video recording and real-time remote monitoring and playback.

High Quality H.264, MxPEG, MPEG-4 and M-JPEG Recording (varied by camera models)

All-in-one Recording Functions

  • Continuous/ manual/ schedule recording
  • Alarm recording (by motion detection or sensor triggered)
  • Alarm recording schedule

You can set different recording schedules for different cameras. Up to 15 schedules are supported for each camera.

Variety Live Video Monitoring

  • 1/ 4/ 6/ 8/ 9/ 10/ 12/ 16/ 20/ 25/ 36/ 42-channel and sequential display mode
  • Exclusive Picture-in-Picture mode
  • Multi-display Mode

Digital Zoom for Monitoring and Playback
The VioStor NVR supports digital zoom function for more flexible monitoring and playback. It is a powerful function for megapixel IP cameras.

Multi-server Monitoring
You can connect to the VioStor NVR and add other QNAP NVR servers to monitor up to 128 channels from a remote PC over LAN or WAN.

Supports Streaming from Network Cameras and Server

  • Stream from the network camera
    The monitoring screens are streamed from the network cameras. When your network surveillance system (VioStor NVR), IP cameras, and PC are installed behind the router, virtual server, or firewall, you will have to configure port forwarding (port mapping) for some of the IP cameras. Please refer to
  • Stream from the server
    The monitoring screens are streamed from the NVR server. There is no need to configure port mapping. However, the VioStor NVR performance may be affected. You may have to adjust the recording settings according to the real performance.

Change the Display Order of the Monitoring Channels
You can switch to display the monitoring channels by selecting the IP cameras on the drop down menu or by drag and drop.

Generic IP Cameras Support
QNAP NVR provides an interface for the users to enter the JPEG CGI command of IP cameras in order to receive the video and audio streaming data from the IP cameras and monitor, record, and playback the video of the IP cameras on the NVR. This feature largely enhances the compatibility and expandability of the NVR.

Audio Recording
The VioStor NVR supports audio recording (varied by camera models).

High Performance Megapixel Recording (up to 8-megapixel)
The VioStor NVR supports high performance megapixel recording (up to 8-megapixel) from various IP cameras.

Smart Control of PTZ & Speed Dome Cameras
The VioStor NVR enables the users to adjust the PTZ cameras directly by the web user interface.


Preset Position Control and Auto Cruising
You can view different preset positions of the camera by clicking the number buttons on the monitoring page. You can also choose the preset positions and configure the time interval on the PTZ cameras for periodic monitoring.


Event Notification on Monitoring
When alarm recording is enabled and an event occurs, an alarm icon is shown instantly on monitoring page. You can click the icon to view the alert details.


Pre-alarm and Post-alarm Recording
The VioStor NVR supports pre-alarm and post-alarm recording, which is used to record additional details before and after an event occurs.


Advanced Event Management
Event ManagementThe compatibility between the NVR and the surveillance devices are strengthened to provide more event handling options when events are detected or alarms are triggered on the IP cameras.

  • Events: The NVR supports more event types, e.g. motion detection and alarm input to trigger the follow-up actions.
  • Actions: More actions can be defined when an alarm is triggered, such as recording, adjusting the IP camera to the preset monitoring point, alarm output, email or SMS alert.

SMSReal-time SMS and Email Alert
The VioStor NVR sends SMS and alert e-mails to the administrator immediately in case of system error or emergent events.


E-map for Easy Preview of the Camera Location
The VioStor NVR provides exclusive E-map function for users to upload the pictures of the monitoring locations.

Video Snapshot
The VioStor NVR provides real-time monitoring as well as real-time snapshot. Users can take a snapshot of the monitoring screen anytime.

Multi-channel Playback at Different Speed
The VioStor NVR supports playback of the recording data from different monitoring channels. It also provides the Express Quad View Playback that you can either divide the selected time equally into four playback views or load four consecutive cameras to play.



Easy Data Search by Date & Time, Timeline, Event, Intelligent Video Analytics (IVA)
IVAThe VioStor NVR supports quick search of recording data by date and time, timeline, event and intelligent video analytics, e.g. motion detection, missing object, foreign object, out of focus, camera occlusion, etc..
How to use How to use intelligent video analytics on playback


WatermarkEnhanced File Security by Digital Watermark
The digital watermark technology allows you to check if the recording files on VioStor NVR are modified or not. Therefore the file security is enhanced.


Recordings can be Played by Windows Media Player
Users can play the files by Windows Media Player. There is no need to install unique program or convert the files to other formats.


Flexible Adjustment of the Length of Recording Files
The VioStor NVR enables the users to flexibly adjust the length of the recording files.

Powerful Schedule Remote Replication
The VioStor NVR supports schedule remote replication for secure data backup to a remote NAS in the local network.

Advanced Event Logs
The VioStor NVR provides detailed event logs of system warning, hard disk error, network disconnection, UPS status, users' networking services and recordings access record.

Easy to Use

Easy System Setup in 6 Steps
The VioStor NVR provides quick setup for users to complete installation in 6 simple steps.

Intuitive Web-based User Interface
All system configurations, monitoring, and playback can be finished by the web-based interface.

Smart Search of IP Camera for Quick Settings
QNAP provides an intelligent software utility Finder for quick IP camera search and system settings.

Convenient Quick Link Buttons of Network Camera
Besides configuring the network cameras by the administration interface of NVR, users can make use of the quick link buttons to access the management interface of the network cameras to configure the cameras.

Excellent Hardware Design

Intel® Atom™ CPU and 1GB Memory for Superior System Performance
The VioStor NVR is an ideal & powerful network video surveillance system designed for SMB and Enterprise. Powered by Intel® Atom™ CPU and 1GB memory, it delivers superior performance for surveillance applications.

Linux Embedded System
The Linux-based NVR is more power-saving and less vulnerable to virus attack compared to PC-based surveillance solution.

Smart Fan
The fan rotation speed is automatically adjusted according to the server's temperature. You can also define the system temperatures to trigger high speed or low speed rotation of the fan.

Dual Gigabit LAN Ports

The dual LAN ports can be configured as failover which allows the VioStor NVR server to sustain the failure of one network port to provide continuous services.

Load Balancing
The two LAN ports of the VioStor NVR can be configured as load balancing mode for bandwidth aggregation to boost the file transfer speed (works with managed Ethernet switch with 802.3ad configured).

Multi-IP Setting
The VioStor NVR can be deployed with two IP settings for sharing among different workgroups in two different subnets.

Support 4 High-speed SATA Hard Drives
SATA hard drives are faster than IDE hard drives, which enhance recording and playback performance.

Up to 8TB Storage Capacity for Long-term Recording
The VioStor NVR is an excellent choice for long-term recording and saving large amount of recording data.

DOM Architecture with Embedded Fail-safe Dual OS for Enhanced Reliability
All the OS and applications are embedded on the DOM. The VioStor NVR allows system booting without accessing the physical disk sectors and that prevents unsuccessful system startup caused by bad block sectors or file errors on the hard drives. Two operating systems are built on the DOM for system booting alternatively upon every system startup. When one fails, the other one will be used to boot up instead, and the failed OS is recoverable from the other healthy OS.

Lockable HDD Tray
The VioStor NVR provides lockable HDD trays to protect the physical hard drives.

High Reliability and Smart Features

Advanced RAID (1/ 5/ 6) with Hot-swap Design
The VioStor NVR offers advanced RAID 0, 1, 5, 6, 5+spare, single, and JBOD disk configurations. It also supports hot-swap design that a failed drive can be replaced by hot swapping without turning off the server. Besides, the best-in-class RAID on the VioStor NVR brings users a higher level of data security by allowing one more hard drive failure than other NVR of the same level.

Online RAID Capacity Expansion and Online RAID Level Migration

Online RAID Capacity Expansion
The storage capacity of a RAID configuration can be expanded by replacing the hard drives with larger ones. All the data will be kept and seamlessly moved to the newly installed hard drives. There is no need to turn off the server during the process.

Online RAID Level Migration
Users can upgrade the disk configuration to higher RAID level with the data retained. There is no need to turnoff the server during the process.

S.M.A.R.T. & Advanced HDD Health Scanning (HHS)
The VioStor NVR supports Hard Disk Drive S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology) for monitoring the hard drive status. The VioStor NVR is embedded with HHS Technology which supports disk checking and bad blocks scanning.

Intelligent Automatic System Startup when Power Recovery
The VioStor NVR supports intelligent power-on support. When enabled, the system turns on automatically when power resumes after power outage.


Support UPS System for 24x7 Service
The VioStor NVR supports both APC and MGE UPS devices to enable stable and continuous recording 24x7. With UPS, the system can function normally in case of power outage or unstable power supply.

Powerful Security Control and Network Services

Powerful Authority Management
To improve the security of the VioStor NVR, the user access control feature is strengthened. The users can be assigned to different user groups (administrator/ system manager/ user). Different rights of monitoring, playback, PTZ control and audio monitoring can be assigned to individual user.

Powerful Host Access Control
The administrator can specify the connections to be allowed and denied to access VioStor NVR.

Auto logoff
QNAP NVR supports automatic user logoff from idling configuration pages. The administrator can set the timeout period to log off the users when the idling time has reached in order to enhance secure management of the NVR.

Provide On-line User List
You can view the record of users currently logged on and previously logged on to the VioStor NVR.

Built-in DDNS Support
The VioStor NVR supports dynamic DNS (DDNS). You can register a unique domain name from a DDNS service provider and assign it to your NVR.

Built-in NTP Server
The date and time of the network cameras can be synchronized with the VioStor NVR.

Convenient Data Access
Users can access the recording data on the VioStor NVR by the following ways, multiple network resource sharing mechanisms are provided for users to access, maintain and play the recording files:

  • Network Neighborhood (SMB/ CIFS)
  • Web File Management (HTTP)
  • FTP server
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