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Synology Deep Learning NVR DVA3221
Deep Learning Video Analytics

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Synology NVR DVA3221 is an on-premises 4-bay desktop NVR solution that integrates Synology’s deep learning-based algorithms to provide a fast, smart, and accurate video surveillance solution. Built-in support for push notifications keeps users informed of possible intrusions, while the automated video surveillance system helps safeguard properties by detecting people, vehicles, and anonymous objects in designated areas.

  • Facial Recognition
    Provide enhanced tracking and greater security by categorizing and then identifying personnel in real-time
  • People & Vehicle Detection
    Build situational awareness by detecting people or vehicles in off-limit areas
  • People Counting
    Measure marketing effectiveness and optimize rental prices by monitoring foot traffic
  • Intrusion Detection
    Setup perimeter lines for automatic notifications when breaches occur
  • Easy and Flexible Integration
    Complete surveillance deployments in no time with support for over 7,600 IP cameras, H.264/H.265, and 4K resolution
  • Cross-Platform Support
    Access from anywhere and anytime with Windows, macOS, iOS™, Android and web browser support
  • Scalable Storage
    Expand with up to two DX517 expansion units for an additional 10 drive bays

Max Camera

32 camera feeds


6 real-time tasks


Up to 14 drives with two DX517


Actionable insights

Video footage is transformed into actionable insights with advanced deep learning-based analytics, enhancing security without requiring additional personnel.

People and vehicle detection
Detect people or vehicles in off-limits areas for increased situational awareness.

People and vehicle detection

People Counting
Create actionable insight on venue occupancy and pathway efficiency with bidirectional counters.

People Counting

Intrusion detection
Issue alerts when a vehicle or person trespasses a virtual line, enabling flexible perimeter monitoring.

Intrusion detection

On-prem recording and analytics

Powered by Synology DSM, footage is kept on the device, with options to flexibly backup or archive to other devices and locations.

Security & privacy
No footage is uploaded to the cloud for storage or analysis. Keep sensitive information secure and locked down.

No recurring fees
One-time hardware and license purchase, with no monthly subscriptions or additional fees for software updates.

Real-time results
Instead of post-event analysis, DVA3221 can notify security operators immediately when incidents occur.

Ease of integration
Compatible with over 7,600 IP cameras, and with ONVIF support, there is no need to replace or be locked into a specific brand of cameras.

Comprehensive VMS platform

DVA3221 is an all-in-one NVR solution, combining video recording, analysis, and advanced video management.

Action rules
Set up security policies so that when a condition is met, corresponding actions can be triggered automatically, reducing time and effort needed for manual interventions.

Easy to setup and operate
Designed to be simple for both administrators and operators, adding and managing cameras, navigating between live feeds and recordings, and configuring permissions and backup tasks are all straightforward. Built ontop of Synology DSM, graphical interfaces simplify complicated tasks, while still retaining flexibility.

Cross-platform, internet-optional
Access your surveillance system on any system through a browser, our PC/Mac/Linux client, or through mobile apps, both with or without internet access.

API ready
Comprehensive documentation available to third-party developers looking to integrate their products or applications with Surveillance Station.

One-stop support
An integrated system means a single point of support for both the hardware and software solution, simplifying setup and maintenance efforts needed.


  1. Drive tray and status indicator
  2. Status indicator
  3. Alert indicator
  4. LAN indicator
  5. Drive tray lock
  6. Power button and indicator
  7. USB 3.2 Gen 1 port
  8. System fan
  9. Power port
  10. Kensington Security Slot
  11. Console port
  12. Reset button
  13. eSATA port
  14. 1GbE RJ-45 port
DVA3221 Hardware Specifications:
Hardware Specifications
CPU Intel Atom C3538 Quad-core 2.1GHz
Hardware encryption engine Yes (AES-NI)
Memory 8 GB DDR4 non-ECC SO-DIMM (4 GB x 2; expandable up to 32 GB with 16 GB ECC SO-DIMM x 2)
Compatible drive type 4 x 3.5” or 2.5” SATA HDD/SSD (drives not included)
Hot swappable drive Yes
External port
  • 3 x USB 3.2 Gen 1 port
  • 2 x eSATA port
  • 1 x COM (for POS system connection)
Size (Height x Width x Depth) 166 x 250 x 237 mm
Weight 4.92 kg
LAN port 4 x Gigabit (RJ-45)
Wake on LAN/WAN Yes
Scheduled power on/off Yes
System fan 1 (120 x 120 x 25 mm)
AC input power voltage 100 V to 240 V AC
Power Frequency 50 to 60Hz, single phase
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -20°C to 60°C (-5°F to 140°F)
Relative Humidity 5% to 95% RH
Maximum operating altitude 5,000 m (16,400 ft)
General DSM specification
Networking protocol SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN, L2TP)
File system
  • Internal: Btrfs, ext4
  • External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT
Supported RAID type Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
Storage management
  • Maximum single volume size: 108 TB
  • Maximum system snapshots: 65,536
  • Maximum internal volume: 64
SSD cache Read/write cache support
File sharing capability
  • Maximum local user account: 2,048
  • Maximum local group: 256
  • Maximum shared folder: 512
  • Maximum concurrent SMB/NFS/AFP/FTP connection: 2,000
Privilege Windows Access Control List (ACL), application privileges
Directory service Windows AD integration: Domain users login via SMB/NFS/AFP/FTP/File Station, LDAP integration
Virtualization VMware vSphere 7 onwards, macOS 10.12 onwards
Security Chrome, Firefox, Edge, Internet Explorer 10 onwards, Safari 10 onwards, Safari (iOS 10 onwards), Chrome (Android™ 6.0 onwards) on tablets
Supported client Windows 7 onwards, macOS 10.12 onwards
Supported browser Chrome, Firefox, Internet Explorer 11 onwards, Safari 11 onwards; Safari (iOS 11 onwards), Chrome (Android™ 6.0 onwards)
Surveillance Station
Maximum IP camera
  • 32 channels (total of 960 FPS at 720p, H.264), including a maximum of 6 real-time Deep Video Analytics tasks
  • 8 free camera licenses included; additional cameras require the purchasing of additional licenses
Deep video analytics feature
  • Face recognition
  • People counting
  • People and vehicle detection
  • Intrusion detection
IP Camera support
  • Video codec: MJPEG, MPEG-4, H.264, H.265, and MxPEG (not supported by Deep Video Analytics tasks)
  • Audio codec: PCM, AAC, AMR, G.711, and G.726
  • Camera bit-rate fine-tuning via constant and variable bit-rate control
  • ONVIF™ 2.6, Profile S certified, Profile G for edge recording
Live View
  • Pan Tilt Zoom (PTZ) support with configurable PTZ speed
  • On-screen camera controls: camera zoom, focus, iris adjustment, auto pan, and auto object tracking
  • E-Map, Snapshot, and Snapshot Editor supported for instant editing after taking a snapshot
  • Video quality settings: bit-rate control, image quality, resolution, and FPS
  • Joystick support for easy navigation
  • Alert panel for a quick display of the most recently triggered events
  • Customizable layout and sequential camera view support
  • Supported recording modes: manual, continuous, motion detection, I/O alarm, action rule, and customized
  • Recording formats: MP4
  • The customized recording mode can be configured as a combination of conditional events, including motion detection, audio detection, tampering detection, and alarm input
  • Edge recording on the SD card of certain supported cameras
  • Configurable pre-recording and post-recording time
  • Customizable layouts for playback in Timeline
  • Playback controls include pause, stop, previous recording, next recording, fast forward, slow motion, frame by frame, and digital zoom in/out
  • Embedded watermark for evidence integrity
  • Image enhancements including brightness, contrast, saturation, and sharpness (web client only)
  • Create and manage different user privileges
  • Rotate recorded videos by archived days or storage size
  • Event notification supported via SMS, E-mail, and mobile devices via DS cam
  • Recordings can be backed up to an external storage or remote server
  • Built-in NTP server
  • Supported tunnel: MPEG-4, H264 via RTSP over TCP, UDP, and HTTP
iOS/Android™ applications Synology LiveCam, DS cam, DS file, DS finder
Surveillance desktop client support Windows 7 onwards, macOS 10.12 onwards
Certifications and Packaging
Environment safety RoHS compliant
Package content
  • 1 x DVA3221 main unit
  • 1 x Quick Installation Guide
  • 1 x Accessory pack
  • 1 x AC power cord
  • 2 x RJ-45 LAN cable
Optional accessories
  • 16 GB DDR4 ECC SO-DIMM (D4ECSO-2666-16G)
  • Synology Expansion Unit DX517
  • VisualStation VS360HD, VS960HD
  • Surveillance Device License Pack
Warranty 3 Years


Download the Synology Deep Learning NVR DVA3221 Datasheet  (PDF).

Pricing Notes: