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TS-251C Specification

TS-251C
Specification
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CPU Intel® Celeron® 2.41GHz dual-core processor (burst up to 2.58GHz)
DRAM 1GB DDR3L RAM (non-upgradeable)
Flash Memory 512MB DOM
Hard Disk Drive 2 x 3.5” SATA 3Gb/s hard drive
NOTE:
1. The system is shipped without HDD.
2. For the HDD compatibility list, please visit https://www.qnap.com/compatibility/
LAN Port 1 x Gigabit RJ-45 Ethernet port
LED Indicators Power, Status, LAN, USB, HDD 1-2
USB 1 x USB 3.2 Gen 1 port (Front: 1)
2 x USB 2.0 port (Rear: 2) 
Support USB printer, pen drive, and USB UPS etc.
HDMI™ 1 (v1.4a, 1080p)
Buttons Power/Status, Reset (for NAS reboot), USB One-Touch-Backup
Alarm Buzzer System warning
IR Receiver Supports QNAP RM-IR002 remote control or MCE-compatible remote controls
Form Factor Tower
Dimensions 166.5 (H)x 85.0(W) x 218.4(D) mm
6.65(H) x 3.35(W) x 8.6(D) inch
Weight Net: 0.94 kg (2.07 lbs)
Gross: 3.16 kg (6.97 lbs)
Power Consumption (W) HDD standby: 7.38W
S3 sleep: 0.7W
In operation: 15.71W
(with 2x 2TB HDD installed)
Sound Level* Sound pressure (LpAm): 14.7 dB(A)
Temperature 0-40˚C
Humidity 5~95% RH non-condensing, wet bulb: 27˚C
Power Supply External Power Adapter, 60W, 100-240V
Secure Design Kensington security slot for theft prevention
Fan 1 x quiet cooling fan (6 cm, 12V DC)
 
Note: Use only QNAP memory modules to maintain system performance and stability. For NAS devices with more than one memory slot, use QNAP modules with identical specifications and refer to the hardware user manual to install compatible QNAP memory modules.
Warning: Using unsupported modules may degrade performance, cause errors, or prevent the operating system from starting.
QNAP reserves the right to replace partial parts or accessories if the original is no longer available from its manufacturer/supplier. Any replacement would be fully tested and verified to meet strict compatibility and stability guidelines and will deliver identical performance to the original.
The terms HDMI, HDMI High-Definition Multimedia Interface, HDMI trade dress and the HDMI Logos are trademarks or registered trademarks of HDMI Licensing Administrator, Inc.
Product images are for illustrative purposes only and may differ from the actual product. Due to differences in monitors, colors of products may also appear different to those shown on the site.
Designs and specifications are subject to change without notice.
Operating System
QTS 4.1 (embedded Linux)
Storage Management
  1. QNAP flexible Volume/LUN with thin provisioning and space reclaim
  2. RAID 0,1
  3. Supports storage pool
  4. SMART data migration
  5. Storage expansion via QNAP UX-500P/UX-800P expansion unit
  6. Bad block scan and hard drive S.M.A.R.T.
  7. RAID recovery
  8. Bitmap support
Supported Client OS
  1. Apple Mac OS 10.7 or later
  2. Linux and UNIX
  3. Microsoft Windows 7, 8, and 10
  4. Microsoft Windows Server 2003, 2008 R2, 2012, 2012 R2 and 2016
Power Management
  1. Wake on LAN
  2. Internal hard drive standby mode
  3. Scheduled power on/off
  4. Automatic power on after power recovery
  5. USB and network UPS support with SNMP management
  6. System sleep mode (S3)
Supported Browsers
  1. Microsoft Internet Explorer 10+
  2. Mozilla Firefox 8+
  3. Apple Safari 4+
  4. Google Chrome
Access Right Management
  1. Batch users creation
  2. Import/Export users
  3. User quota management
  4. Local user access control for CIFS, AFP, FTP, and WebDAV
  5. Application access control for Photo Station, Music Station, Video Station, and File Station
  6. Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
Multilingual Support
  1. Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
Domain Authentication Integration
  1. Microsoft Active Directory (AD)
  2. LDAP Server, LDAP Client
  3. Domain Users Login via CIFS/SMB, AFP, FTP, and File Station
File System
  1. Internal Hard Drive: EXT4
  2. External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
myQNAPcloud Service
  1. Private cloud storage and sharing
  2. Free host name registration (DDNS)
  3. Auto router configuration (via UPnP)
  4. Web-based file manager with HTTPS 2048-bit encryption
  5. myQNAPcloud Link for remote access without complicated router setup
  6. myQNAPcloud connect for easy VPN connection (Windows VPN utility)
Networking
  1. TCP/IP (IPv4 & IPv6: Dual Stack)*
  2. Gigabit NIC with jumbo frame
  3. Proxy server (Squid available in App Center)
  4. Proxy client
  5. DHCP client, DHCP server
  6. Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
  7. UPnP & Bonjour Discovery
  8. USB Wi-Fi Adapter Support
    • Not all services are supported.
Qsync
  1. Syncs files among multiple devices with SSL support
  2. Selective synchronization for syncing specific folders only
  3. Use team folders as a file center for greater team collaboration (maximum sync tasks:32)
  4. Shares files by links via email
  5. Policy settings for conflicted files and file type filter support
  6. Version control: up to 64 versions.
  7. Incremental synchronization for HDD space saving
  8. Supports Windows & Mac OS
Security
  1. Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
  2. CIFS host access control for shared folders
  3. FIPS 140-2 validated AES 256-bit volume-based data encryption*
  4. AES 256-bit external drive encryption*
  5. Importable SSL certificates
  6. Instant alert via email, SMS, beep
    • Somedata encryption functions may not available in accordance with the legislative restrictions of some countries.
Web Administration
  1. Smart toolbar and dashboard for neat system status display
  2. Smart fan Control
  3. Dynamic DNS (DDNS)
  4. SNMP (v2 & v3)
  5. Resource monitor
  6. Network recycle bin for file deletion via CIFS/SMB, AFP, and File Station
    • Automatic Cleanup
    • File Type Filter
  7. Comprehensive logs (events & connection)
  8. Syslog client/server
  9. System settings backup and restore
  10. Restore to factory default
  11. Mobile app: Qmanager for remote system monitoring & management
Powerful All-in-one server
File Server
  1. File sharing across Windows, Mac, and Linux/UNIX
  2. Windows ACL
  3. Advanced folder permission for CIFS/SMB, AFP, FTP
  4. Shared folder aggregation (CIFS/SMB)
Download Station
  1. PC-less BT, FTP/FTPS, and HTTP/HTTPS download (up to 500 Tasks)
  2. BT download with Magnet Link and PT support
  3. Scheduled download and bandwidth control
  4. RSS subscription and download (broadcatching)
  5. Bulk download with wildcard settings
  6. BT search
  7. Proxy support for BT download
  8. PC utility: Qget for downloads browsing and management
  9. Mobile app: Qget for downloads browsing and management
FTP Server
  1. FTP over SSL/TLS (Explicit)
  2. FXP support
  3. Passive ftp port range control
Notes Station
  1. Take notes everywhere you go with a handy Note-taking tool on your private cloud.
  2. Direct and quick backup from Evernote with re-editing abilities
  3. Supports Google Calendar
  4. Import/Export PDF files
  5. RSS live feed and auto updates
  6. Online quick preview multimedia attachments
  7. Encrypt/decrypt notes to protect private/confidential information
  8. Smart snapshot for version control
  9. Background tasks available for multi-tasking users
  10. Multi-user note collaboration
  11. Supports a graphical editor for note editing
  12. Three-tier Note structure for easy organization
  13. Support keyword search
  14. Provides Chrome Extension: Notes Station Clipper (Clip web page content to your notes)
File Station
  1. Supports ISO Mounting (Up to 256 ISO Files)
  2. Supports thumbnail display of multimedia files
  3. Supports sharing download links and upload links
  4. Drag-n-drop Files via Google Chrome and Mozilla Firefox
  5. Photo, music, and video preview and playback with hardware-accelerated transcoding     
  6. File Compression (ZIP or 7z)
  7. Creation of and sending download links for sharing public files with expiration time and password protection
  8. Support for displaying subtitles (*.SRT, UTF-8 format)
    • Video seeking support for video playback during on-the-fly transcoding
    • Support slideshow playback in media viewer
  9. Mobile App: Qfile for file browsing and management
HD (HybridDesk) Station
  1. Playback videos, music, photos on yout TV with Kodi via HDMI™ output
  2. Watch various online contents such as Flickr, Picasa, Shoutcast, and more.
  3. Web browser (Chrome, Firefox)
  4. Supports USB U.S. keyboard and mouse
  5. Supports QNAP Qremote app and the official Kodi remote app
  6. Supports user login permissions
  7. Note:
    • The playback and quality of some video files may be affected due to the CPU and GPU decoding abilities.
Transcode Management
  1. Transcode video files to 240p, 360p, 480p, 720p and 1080p resolutions
  2. Automatic video transcoding for watched folders
  3. Hardware-accelerated transcoding support
  4. Embed subtitles with videos inbackground transcoding
Signage Station
  1. Supports dynamic content including videos, images, music, and text messages
  2. Supports multi-user collaboration
  3. Supports searching via keywords,
  4. Supportssharing via email and social networks
  5. Supports design software - iArtist Lite
  6. Supports account authority management
  7. Supports various web browsers for playback (Chrome, Firefox, IE, Safari)
  8. Supports most-viewed, latest-released and different categories content list
Backup Station
  1. Remote replication server (over rsync)
  2. Real-time remote replication (RTRR) to another QNAP NAS or FTP server
  3. Works as both RTRR server & client with bandwidth control
  4. Real-time & scheduled backup
  5. Encryption, compression, file filters, and transfer rate limitations
  6. Encrypted replication between QNAP NAS servers
  7. Desktop backup with QNAP NetBak Replicator for Windows
  8. Apple Time Machine backup support
  9. Data backup to multiple external storage devices
  10. Synchronizes with cloud storage: Amazon S3, ElephantDrive, Dropbox*, and Google Cloud Storage
  11. Third party backup software support: Veeam backup & replication, Acronis True Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.
Storage Plug & Connect
  1. Creating and mapping shared folders usingQNAP Windows Qfinder Pro
  2. Creation of and connection to iSCSI targets/LUN
Print Server
  1. Max. number of printers: 3
  2. Support for Internet Printing Protocol
  3. Print job display and management
  4. IP-based and domain name-based privilege control
iSCSI (IP SAN)
  1. iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined)
  2. Support for LUN mapping & masking
  3. Online LUN capacity expansion
  4. Support for SPC-3 persistent reservation
  5. Support for MPIO & MC/S
  6. iSCSI LUN backup, one-time snapshot, and restoration
  7. iSCSI connection and management by QNAP Windows Qfinder Pro
  8. Virtual disk drive (via iSCSI initiator)
  9. Stack chaining master
  10. Max No. of virtual disk drives: 8
Photo Station
  1. Show photos usingthumbnails, list, timeline, or folder view
  2. Supports virtual/smart album
  3. Validity control for sharing albums
  4. Tag photos with text, color, and ratings
  5. Slideshows with background music and different transition effects
  6. Animated thumbnails for videos
  7. Geotag photos and display them on Google Maps
  8. Share slideshows links to social websites or through email
  9. Supports Facebook friends login
  10. Supports modification of the photo taken date
Surveillance Station
  1. Supports over 2,700 IP cameras
  2. Includes 2 free camera licenses, up to 24 camera channels via additional license purchase
  3. Instant playback to check recent events
  4. Online editing to change cameras when in live view
  5. Visual aid by using e-maps
  6. Playback and speed control by shuttle bar
  7. Video preview using playback timeline
  8. Intelligent Video Analytics (IVA) for advanced video search
  9. Surveillance client for Mac
  10. Mobile surveillance app: Vmobile (iOS and Android)
  11. Mobile recording app: Vcam (iOS and Android)
Music Station
  1. Playandshare music collections viaweb browsers
  2. Automatic classification via Media Library
  3. Supported audio formats: AIFF, APE, FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM),WMA, WMA PRO, WMA VBR*
  4. Internet radio (MP3)
  5. Up to 8 music alarms
  6. Mobile app: Qmusic for music streaming and management
    • DRM-protected music files are not supported.
VPN Server
  1. Secure remote access: PPTP & OpenVPN VPN services
  2. Max number of clients: 30
VPN Client
  1. Supported VPN protocols: PPTP & OpenVPN services
  2. PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2
  3. PPTP Encryption: None, AES 40/128 bit, AES 256 bit
  4. OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit
  5. Transmission package monitor
  6. OpenVPN port control
  7. OpenVPN link compression
Video Station
  1. Show videos using thumbnails, list, timeline, or folder view
  2. Supports virtual/smart collections
  3. Validity control for sharing collections
  4. Tag videos with text, color, and ratings
  5. Animated thumbnails for videos
  6. Share video collection links to social websites or through email
  7. Sort videos automatically into defined classifications
  8. Display movie information from IMDB
  9. Supportssubtitles (*.SRT, UTF-8 format)
  10. Video seeking support for video playback during on-the-fly transcoding
  11. Mobile app: Qvideo for online video browsing and management
DLNA Server
  1. Supports DLNA/UPnP TVs and Players such as PlayStation 3 and Xbox 360
  2. Supported audio formats: AIFF, APE, DSD (DSF, DFF), FLAC, M4A, M4A Apple Lossless (ALAC), MP3, Ogg Vorbis, WAV (PCM, LPCM), WMA, WMA PRO, WMA VBR*
  3. Support CUE indexing files for APE, FLAC audio format.
  4. Video and Audio On-the-fly Transcoding
    *DRM-protected filesare not supported.
Cloud Backup Station
  1. Amazon S3
  2. Amazon Glacier
  3. Webdev-based cloud storage
  4. Microsoft Azure
  5. Open Stack
App Center
  1. Over 100 official and community software add-ons (including Dropbox, Google Cloud Storage Sync, McAfee, WordPress, HappyGet II, and more.)
AirPlay & Chromecast
  1. Streams videos, photos and music from the NAS to Apple TV via Qfile or Media Streaming add-on.
  2. Streams videos, photos and music from the NAS to TV with a Chromecast dongle via Qfile , Qvideo or Media Streaming add-on.
 
 

Designs and specifications are subject to change without notice.
 
TS-251C Ethernet cable x 1 Quick Installation Guide
Power cord SATA power cable x 1 SATA cable x 1
 
Adaptor Screw pack  

Optional Accessories

  1. RM-IR002
    RM-IR002 (EOL)
    SCR-HDD25A-96
    SCR-HDD25A-96
    SP-2BAY-CABLE
    SP-2BAY-CABLE
Bundled accessories delivered together with the product such as expansion cards, power adapter, and accessories are covered with one-year warranty.

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