QNAP TS-451A-4G User Manual

TS-251A & TS-451A

Free
Remote Control

2-bay & 4-bay Turbo NAS

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

Use your Turbo NAS as a PC

QmailAgent email client helps you manage,
access and backup multiple email accounts

USB QuickAccess Port

Directly set up your NAS and access your NAS data by
connecting your Windows® or Mac computer to the USB QuickAccess port

Hardware-accelerated HDMI 4K Ultra HD playback and transcoding
AES-NI hardware-accelerated encryption to deliver up to 196 MB/s throughput
QTS-Ubuntu dual systems enables users to enjoy rich apps from QTS App Center & Linux
Block-level snapshot helps you easily backup and restore data
QNAP VJBOD (Virtual JBOD) allows you to expand the storage of the
NAS by using unused storage from other QNAP NAS units
Build a personal karaoke system with OceanKTV by 3.5 mm microphone jack

3 x USB 3.0

2GB / 4GB

Max 8GB RAM

SATA 6Gb/s

2.5"/3.5"

QNAP

expansion units

Virtualization

Station

Container

station

14nm Intel® Celeron®

N3060 dual-core 1.6GHz

(burst up to 2.48GHz)

TS-451A TS-251A

I

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

USB QuickAccess/NAS/ iSCSI-SAN triple solution

NAS

The TS-251A & TS-451A innovatively re-defines what NAS
can do byproviding a USB QuickAccess/NAS/iSCSI SAN triple
solution. It discards the restriction of conventional USB
QuickAccess that only allows connecting to one device, and
breaks the cost barrier for a dual Gigabit Ethernet solution.

Direct access to les with the USB QuickAccess port

1 2

The TS-251A & TS-451A features an innovative USB 3.0 QuickAccess port
that allows you to complete the rst-time installation and setup of your
TS-251A & TS-451A without requiring network connectivity. The les and
data stored on the TS-251A & TS-451A can also be directly accessed by

The TS-251A & TS-451A features Ethernet networking
for exible and simultaneous le sharing across multiple
devices, using SMB/CIFS, NFS and AFP protocols for
sharing across Windows, Mac and Linux/UNIX networks.

using Qnder Pro* and a USB 3.0 A-Male to Micro B-Male cable or a USB

2.0 Micro B cable**. Furthermore, you can assign access rights to users for
dierent folders to prevent unauthorized access to important les.

* Qnder Pro only supports Windows and Mac OS X
** A USB cable is not included. USB QuickAccess supports Windows 8.1/10 and Mac

versions may require driver installation,

OS X 10.8 (and newer). Other

USB

QuickAccess

iSCSI

SAN

Ethernet NAS mode

Ethernet IP

TS-251A

接電腦

接NAS

USB 3.0

SMB / CIFS / NFS / FTP / HTTP

Enjoy the best audiovisual experience with HDMI output and a free remote control

HybridDesk Station integrates 3rd-party
media players and a web browser. With HDMI
connectivity, you can connect the TS-251A
& TS-451A to a HDTV or an A/V receiver to
enjoy your rich multimedia content and 4K
H.264 videos. The NAS includes a free QNAP
remote control for you to conveniently
control HybridDesk Station through its built­in IR receiver. With the help of the new smart
remote control learning function, you can
also pair up to three TV or stereo IR remote
controls.

Ethernet IP

TS-251A / 451A

Playback capability and quality may vary due to factors including the
original le formats/quality, hardware and software limitations, system
load and the output devices.

1

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

Intel® Celeron® N3060 quad-core CPU and hardware-accelerated encryption engine

The TS-251A & TS-451A is powered by an advanced
14nm Intel® Celeron® quad-core 1.6GHz processor
that features low TDP (only 6 watts) and can
automatically burst up to 2.48GHz. Coupled with
dual-channel 2GB / 4GB DDR3L-1600 dual-channel
RAM (upgradable to 8GB), dual Gigabit LAN ports,
and SATA 6Gb/s, the TS-251A & TS-451A can deliver
up to 220MB/ s throughput for optimizing mission-

MB/s

critical tasks while still being energy efficient. The
TS-251A & TS-451A also features Intel® AES-NI
hardwareaccelerated encryption to deliver up to
196MB/s throughput with AES 256-bit encryption for
both full NAS volume and shared folders, boosting
system performance & security while ensuring the
safety of sensitive business data stored in the NAS.

iSCSI SAN block-based mode

3

The TS-251A & TS-451A supports iSCSI SAN. After creating an iSCSI
target on the TS-251A & TS-451A, you can access the iSCSI with
your computer* using the NAS IP.

Throughput (2x GbE)

250

200

150

100

50

Tested in QNAP Labs. Figures may vary by environment.
Test Environment:
NAS: TS-451A, QTS 4.2.2
Volume type: RAID 5; 4 x Seagate 1TB ST1000NM0033 HDDs: NAS and PCs are connected.
Client PCs: Intel® Core™ i7-4770 3.40GHz CPU; DDR3L 1600Hz 16GB; 10GbE NIC: QNAP LAN-10G2SF-MLX ; Windows® 10

197.66

0

Read Write Read Write

220.77

AES-256 Volume Encryption

Throughput (2x GbE)

250

200

150

MB/s

100

50

147.84

0

196.29

Ethernet switch Ethernet IP

iSCSI SAN

TS-251A / 451A

Enjoy media freely with multi-zone multimedia controls Superior 4K video transcoding

Use your NAS as a multi-zone multimedia system
to fill every corner of your house with your
choice of media. You can centrally manage and
stream photos, music and videos from the NAS
to different rooms from a single device using
Bluetooth® & USB devices connected to the NAS
(for music streaming only), HDMI, DLNA®, Apple
TV® and Chromecast™*. Alternatively, to enjoy
multimedia yourself, you can choose DLNA­compatible devices, use the Qfile app on an
iOS® device to browse videos/photos and play
on the TV via Apple TV®, or transform the NAS
into a powerful streaming machine with DLNA®,
Roku®, Amazon® Fire TV, Google TV™ and Plex
Media Server support.

* To stream multimedia via Chromecast, you must rst install the multimedia
extension pack from the QTS App Center.

Featuring advanced 8th-generation Intel®
HD Graphics, the TS-251A & TS-451A
supports 4K H.264 hardware decoding
and delivers superior real-time 4K and
1080p video transcoding to convert
videos to universal formats that can be
smoothly played on PCs, mobile devices
and Smart TVs. With offline transcoding,
even when you can
only connect using
a low-speed Internet
connection, you can
still enjoy smooth
video playback.

4K 2K

2

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

iSCSI LUN

Centralize backup, restoration and synchronization with Hybrid Backup Sync

Hybrid Backup Sync consolidates backup, restoration
and synchronization functions into a single QTS
application for you to easily transfer your data to local or
remote QNAP NAS and to cloud storage spaces. You can
synchronize files between the TS-251A & TS-451A and
cloud storage in real time - including Amazon® Cloud
Drive, Google Drive™, Dropbox®, Microsoft OneDrive®,
Yandex® Disk, and Box®, and back up les to Amazon®
S3, Amazon® Glacier, Microsoft® Azure™, Google
Cloud Storage™, OpenStack Swift and WebDAV cloud
services. Hybrid Backup Sync can detect sparse les to
avoid backing up unnecessary data, and supports file
compression to save storage space.

Restore files with snapshot for volume & LUN

QTS Storage Manager features an easy-to-use web­based snapshot tool to easily backup and restore data
on the TS-251A & TS-451A back to any point of time
in the event of data loss. You can take snapshots for
volumes and LUN (up to 64 snapshots per volume/
LUN and maximum 256 snapshots per NAS), eciently
replicate volume/LUN snapshots via Snapshot Replica
to remote servers by copying only the changes made,
and quickly clone a volume /LUN snapshot as a local
volume without interrupting current system operations.
You can even set up the system to automatically take a
snapshot of the volume before backup via RTRR/rsync,
even if les are opened.

QNAP NAS and JBOD Volume

Snapshot/Snapshot Clone

Snapshot

Volume

Remotely Stored Snapshot

Use NAS to expand NAS capacity with Virtual JBOD

QNAP VJBOD (Virtual JBOD) is network-based JBOD that
allows you to expand the storage of the TS-251 & TS-451
by using unused storage from other QNAP NAS units.
You can mount this storage space to the NAS as virtual
disks and create virtual storage pools and volumes
for NAS functions. VJBOD supports port trunking (link
aggregation with dual LAN ports) that increase the
performance and reliability of your VJBOD storage.

QTS-Ubuntu dual systems for IoT applications

The QTS-Linux dual systems are based on QNAP's advanced
virtualization technologies. The TS-251A & TS-451A enables
users to not only to download rich apps from QTS App
Center but also supports Ubuntu and allows users to
develop and install various IoT packages. Simply plug in a
keyboard, mouse and HDMI monitor to the TS-251A & TS­451A, and use the Linux Station as if you were using a PC.
You can also operate Ubuntu in Linux Station as a remote
desktop via web browser for instant management*.

Linux Station requires a QNAP NAS with at least 4GB RAM & Container Station v1.5.1343+.

LAN cable

Network Switch

VJBOD VJBOD

VJBOD + Port Trunking

(with connection fault tolerance)

USB 3.0

USB expansion unit (JBOD)

(without fault tolerance)

3

Storage for hosting virtual machines and containerized applications

Virtualization Station allows you to host virtual machines (VM)
on the TS-251A & TS-451A and access them via a web browser
or VNC. Virtualization Station supports multiple operating
systems, fast VM creation, VM backup & restoration, VM import/
export, snapshot, and Device Management for centrally
managing VM. The TS-251A & TS-451A also features the game
changingcontainer technology for server virtualization with
Container Station. It exclusively integrates LXC and Docker®
lightweight virtualization technologies. Container Station now
also provides the QIoT Containers platform to help you quickly
structure your IoT environment and deployment in your private
cloud.

Enjoy an exclusive karaoke experience

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

OceanKTV is the rst NAS-based karaoke application and allows
you to create a quality karaoke experience at home or in the
oce. The NAS comes with a 3.5 mm microphone jack and can
transmit audio to your amplier using HDMI or the 3.5 mm line
out port. Simply attach an HDMI display to the NAS and start
singing with OceanKTV.

3.5mm Dynamic

Microphone Input

3.5mm Line Out

TV

TS-451A

HDMI

HDMI

Extensive apps and utilities

The NAS provides several useful applications to extend beyond
basic storage functionality. Use Download Station to download
files without switching on your PC. Enjoy easy access to your
files from your mobile devices using mobile Apps like File,
Qphoto, and Qmusic. Use Qfinder Pro to help you find, access
and manage your QNAP NAS on your network easily.

Amplifier

Speakers

Audio OutVideo Out

4

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

QmailAgent: a mailroom center for your private cloud

QmailAgent is an online email client that helps you manage
multiple email accounts, allowing you to access all of your emails
and to easily switch between different accounts. It provides
complete functionality for composing, reading and organizing
emails. You can even attach files, photos and documents from
the NAS when composing emails. Qmail also allows iOS® and
Android™ users to quickly check multiple email accounts
with mobile devices, and to browse & send emails using the
QmailAgent on their NAS.

Back up all emails to high-capacity NAS

QmailAgent supports automatically backing up your emails
to the NAS. After you import email account details and upon
logging in, QmailAgent will start backing up your emails from
the servers (or cloud) to your NAS, allowing you to be protected
against accidental email deletion.

Sync

NAS

Read, compose, reply and

forward emails

Receive and send emails with your mobile devices through NAS

You can also download Qmail Client (a
companion app for iOS and Android devices)
to allow you to access your emails via your
NAS. With Qmail Client on your mobile device,
the system will display and cache new emails
on your mobile device to keep you updated,
and you can read them even when an Internet
connection is unavailable.

Comprehensive surveillance solution providing 24/7 security

Surveillance Station is a professional network
surveillance Video Management System (VMS)
that oers a user-friendly management interface,
over 3,000 compatible IP camera models, and
expandable IP camera channel licenses. It supports
real-time monitoring, video & audio recording
and playback with a wide range of customizable
settings. You can also install the Vmobile app
on your iOS® or Android™ devices to manage
monitored channels anytime and anywhere to
safeguard your office environment, or install
the Vcam mobile app to turn your device into a
network camera to instantly record to your NAS.
The NAS includes 2 free IP camera channels and
you can expand up to 32 channels by purchasing
additional licenses.

5

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

Operating System

• QTS 4.2 (embedded Linux)

Supported Client OS

• Windows 7, Windows 8, Windows 10, Windows
Server 2003/2008 R2/2012/2012R2

• Apple Mac OS X, Linux & UNIX

Supported Browsers

• Microsoft Internet Explorer 10+ , Google
Chrome, Apple Safari 7+, Mozilla Firefox

Multilingual Support

• Chinese (Traditional & Simplied), Czech,
Danish, Dutch, English, Finnish, French,
German, Greek, Hungarian, Italian, Japanese,
Korean, Norwegian, Polish, Portuguese (Brazil),
Romanian, Russian, Spanish, Swedish, Thai,
Turkish

File System

• Internal Hard Drive: EXT4

• External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+

Networking

• TCP/IP (IPv4 & IPv6: Dual Stack)1

• Dual Gigabit NICs with jumbo frame (failover,
multi-IP settings, port trunking/NIC teaming)

• Service binding based on network interfaces

• Squid Proxy server & Proxy client

• Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP,
FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI,
SNMP, SMTP, and SMSC

• UPnP & Bonjour Discovery

Network & Virtual Switch

• DHCP client, DHCP server

• USB Wi-Fi Adapter Support

• Virtual Switch

Security

• Network access protection with auto-blocking:
SSH, Telnet, HT TP(S), FTP, CIFS/SMB, AFP

• CIFS host access control for shared folders

• FIPS 140-2 validated AES 256-bit volume-based
and shared folder data encryption2

• AES 256-bit external drive encryption2

• Importable SSL certicates

• Instant alerts via email, SMS, beep, and push
service

• 2-step verication

Storage Management

• Storage Space Utilization monitoring

• QNAP exible Volume/LUN with thin
provisioning and space reclaim3

• Disk volume types

• 2-Bay: RAID 0,1, JBOD, single

• 4-Bay: RAID 0,1, 5, 6, 10, 5 + hot spare, JBOD, single

• Supports storage pools

• Supports volume/LUN snapshots, up to 256 per
system (4GB System RAM required)3

• Online volume expansion

• Online storage pool expansion

• Online RAID capacity expansion and online
RAID level migration

• SMART data migration

• Storage expansion via a QNAP UX-500P/UX­800P expansion unit

• JBOD enclosure roaming

• SSD read-only/read-write cache

Power Management

• Wake on LAN

• Internal hard drive standby mode

• Scheduled power on/o

• Automatic power on after power recovery

• USB and network UPS support with SNMP
management

• System sleep mode (S3)

Access Right Management

• Batch users creation, import/export users

• User quota management

• Local user access control for CIFS, AFP, FTP, and
WebDAV

• Application access control for Photo Station,
Music Station, Video Station, and File Station

• Subfolder permissions support for CIFS/SMB,
AFP, FTP, and File Station

Domain Authentication Integration

• Microsoft Active Directory (AD) & Domain
Controller support

• LDAP server, LDAP client

• Domain users login via CIFS/SMB, AFP, FTP, and
File Station

myQNAPcloud Service

• Private cloud storage and sharing

• Free host name registration (DDNS)

• Optional myQNAPcloud SSL certicates (DDNS)

• Auto router conguration (via UPnP)

• Web-based le manager with HTTPS 2048-bit
encryption

• CloudLink for remote access without any
complicated router setup

• myQNAPcloud connect for easy VPN connection
(Windows VPN utility)

Qsync

• Sync les across multiple devices with SSL
secure connection

• Selective synchronization for only syncing
specic folders

• Use team folders as a le center for greater team
collaboration (maximum sync tasks:32)

• Shares les by links via e-mail

• Policy settings for conicting les and le type
lter support

• Version control: up to 64 versions.

• Supports central conguration mode

• Supports remote erase/restore

• Supports Windows & Mac OS

Web Administration

• Multi-window, multi-tasking based system
management

• Dynamic DNS (DDNS)

• SNMP (v2 & v3)

• Resource monitor

• Network recycle bin for file deletion via

CIFS/SMB, AFP, and File Station

• Comprehensive logs (events & connection)

• Syslog client/server

• Mobile app: Qmanager for remote system
monitoring & management

File Server

• File sharing across Windows, Mac, and Linux/
UNIX

• Windows ACL

• Advanced folder permissions for CIFS/SMB, AFP,
FTP

• Shared folder aggregation (CIFS/SMB)

FTP Server

• FTP over SSL/TLS (Explicit)

• FXP support

File Station

• Supports mounting cloud drives (such as
Google Drive, Dropbox, Microsoft OneDrive,
Amazon Cloud Drive, Yandex Disk and Box).

• Supports mounting remote shared folders
through FTP, WebDAV or Microsoft networking
(SMB/CIFS)

• Supports opening documents via Oce Online,
Google Docs or Chrome Extension (Edit Oce
les in Google Docs, Sheets, and Slides)

• Supports ISO Mounting (Up to 256 ISO Files)

• Drag-n-drop Files via Chrome and Firefox
Browsers

• Photo, music, and video preview and playback
with hardware-accelerated transcoding

• File Compression (ZIP or 7z)

• Supports displaying subtitles (*.SRT, UTF-8
format)

- Video seeking support for video playback

during on-the-y transcoding

- Supports slideshow playback in media viewer

• Mobile App: Qle for le browsing and
management

Transcode Management

• Transcode video les to 240p, 360p, 480p, 720p
and 1080p resolution

• Automatic video transcoding for watched
folders

• Hardware accelerated transcoding support

• Embed subtitles into videos for background
transcoding

Backup Station

• Remote replication server (over rsync)

• Real-time remote replication (RTRR) to another
QNAP NAS, FTP or CIFS/SMB server

• Works as both RTRR server & client with
bandwidth control

• Real-time & scheduled backup

• Backup versioning for RTRR

• Snapshot support for RTRR/Rsync

• Encryption, compression, le lter, and transfer
rate limitation

• Desktop backup with QNAP NetBak Replicator
for Windows 

• Apple Time Machine backup support

• Data backup to multiple external storage
devices

• Third party backup software support: Veeam
backup & replication, Acronis True Image,
Arcserve backup, emc retrospect, Symantec
Backup Exec, etc.

Cloud Drive Sync

• Multiple cloud account management like
Google Drive, Dropbox, OneDrive, and hubiC

• Supports multiple cloud accounts

• Concurrent job execution and multi-threaded
data transfer

• Per-account bandwidth throttling

Cloud Backup Station

• Amazon S3 Plus (including Amazon S3), Glacier

• Google Cloud Storage

• WebDAV-based cloud storage

• Microsoft Azure

• OpenStack Swift

Print Server

• Max number of printers: 3

• Supports Internet Printing Protocol

• Print job display and management

• IP-based and domain name-based privilege
control

Photo Station

• Show photos by thumbnails, list, timeline, or
folder view

• Tag photos with text, colors, and ratings

• Slideshows with background music and
dierent transition eects

• Geotag photos and display them on Google
maps

• Supports uploading photos/videos to Picasa,
Flickr, Weibo, YouTube

• Supports face detection (with the Photo Station
Extension)

• Supports PDF to image conversion (with the
Photo Station Extension)

• Supports Facebook friends login

Music Station

• Play or share music via web browser

• Supports changing album covers via Google
search or by uploading photos.

• Internet radio (MP3)

• Up to 8 music alarms

• Mobile app: Qmusic for music streaming and
management

iTunes Server

• Audio and video sharing for Windows  & Mac
iTunes

Video Station

• Show photos by thumbnails, list, timeline, or
folder view

• Tag videos with text, color, and ratings

• Share video links to social websites or through
email

• Display movie information and posters from
Internet sources or user-uploaded les

• Supports displaying subtitles (*.SRT,*.ASS,
*.SSA), online searching and downloading of
subtitles as well as importing subtitle les

• Supports Facebook friends login

• Mobile app: Qvideo for online video browsing
and management

AirPlay & Chromecastk

• Streams videos, photos and music from NAS to
Apple TV or Chromecast via File Station, Music
Station, Photo Station, Video Station or mobile
app (Qle, Qmusic, Qphoto or Qvideo).

Note: The Media Streaming add-on app must be
installed from the QTS App Center.

Download Station

• PC-less BT, FTP/FTPS, and HTTP/HTTPS, Thunder,
FlashGet and qqdl download (up to 500 Tasks)

• The maximum number of concurrent
downloads: 90 (30 BT/PT, 30 HTTP, 30FTP
downloads)

• BT download with search, Magnet Link and PT
support

• Scheduled download and bandwidth control

• RSS subscription and download (broadcatching)

• Proxy support for BT download

• Mobile app: Qget for downloads browsing and
management

HD (HybridDesk) Station

• Playback videos, music, photos on TV with Kodi
via HDMI

• Watch various online contents

• Web browsers (Chrome, Firefox)

• Supports international keyboards, input and
mouse

• Supports QNAP Qremote app and the ocial
Kodi remote app

• Supports user login permissions

• A variety of applications are available including
Skype, Plex Home Theater, and more

• Up to 7.1 channel audio passthrough is
supported

Note:The playback and quality of some video
files may be aected by the system’s CPU and
GPU decoding abilities.

Linux Station

• Use your NAS as a Ubuntu PC using the NAS
HDMI output.

• Download and use a variety of applications
from the Ubuntu Software Center.

• Supports remote desktop to monitor and access
Ubuntu remotely.

• An open source software platform for
developers.

Note: The NAS requires at least 4GB RAM and
Container Station must be installed.

Virtualization Station

• Supports Virtual Machine (VM) creation to run
operating systems such as Windows, Linux, Unix
and Android

• Supports VM import and export, cloning &
snapshot, backup and restore

• VM console can be displayed via HDMI output ­QVM

• HTML5-based shared remote console

• Supports three dierent networking modes:
Isolated, External-only and Bridged

Container Station

• Supports LXC and Docker

• Download applications from the built-in Docker
Hub Registry

• Supports one-click installation, container
export/import & console mode

• Supports two network modes (NAT and host)

• Supports auto-start containers

• Supports downloading Docker certicates

• Supports adding private registries

Qsirch

• Supports full-text search in real-time

• Bar chart to show data distribution

• Supports previews for photos, music, videos,
Gmail, PDF .etc

• Show search results using thumbnails or a list

• Supports search Chrome extension

iSCSI (IP SAN)

• iSCSI target with multi-LUNs per target (Up to
256 targets/LUNs combined)

• Supports LUN mapping & masking

• Online LUN capacity expansion

• Support for SPC-3 persistent reservation

• Supports MPIO & MC/S

• iSCSI LUN backup, one-time snapshot, and
restoration

• iSCSI connection and management by QNAP
Windows Qnder

• Virtual disk drive (via iSCSI initiator)

• Stack chaining master

• Max No. of virtual disk drives: 8

Surveillance Station

• Supports over 3,000 IP cameras

• Includes 2 free camera licenses, up to 32 camera
channels by purchasing additional licenses

• Instant playback to check recent events

• Visual aid by e-map

• Playback and speed control using the shuttle
bar

• Video preview on playback timeline

• Intelligent video analytics (IVA) for advanced
video searching

• Surveillance client for Mac

• Mobile surveillance app: Vmobile (iOS and
Android)

• Mobile recording app: Vcam (iOS and Android)

VPN Server

• Secure remote access: PPTP、L2TP/IPsec &
OpenVPN VPN services

• Max number of clients: 45 (15 clients for each
protocol)

VPN Client

• Supported VPN protocols: PPTP and OpenVPN
services

• PPTP Authentication: PAP, CHAP, MS-CHAP, MS­CHAPv2

• PPTP Encryption: None, AES 40/128 bit, AES 256 bit

• OpenVPN Encryption: None, AES 40/128 bit,
AES 256 bit

• Transmission package monitor

• OpenVPN port control & link compression

DLNA Server

• Supports DLNA/UPnP TVs and players such as
PlayStation 4 and Xbox One

• Support CUE indexing le for APE, FLAC audio
format.

• Video and Audio On-the-fly Transcoding

OceanKTV

• Use the NAS as a karaoke machine.

• Display songs by artists, languages, and
favorites.

• Enhance the experience with eects such as
tuning echo, key, or applause

• Control the playlist with a mobile app.

• Supports keyboard and remote control (RM­RF001/ RM-IR002)

Qfinder Pro with Storage Plug & Connect

• Creating and mapping shared folders by QNAP
Windows Qnder Pro

• Creation of and connection to iSCSI target/LUN

App Center

• Over 100 ocial and community software add­ons such as Q’center, Signage Station, Notes
Station,

1 Not all IPv6 services are supported.
2 Data encryption functions may be unavailable

in accordance with the legislative restrictions

of some countries.
3 This feature may vary by model.
4 DRM-protected content is not supported.

Designs and specications are subject to change
without notice.

6

TS-251A & TS-451A 2-bay & 4-bay Turbo NAS

Hardware Specications

SD crad reader

Power button

USB 3.0 (One Touch Copy)

USB QuickAccess port

Ordering P/N TS-251A-4G TS-251A-2G TS-451A-4G TS-451A-2G

Processor 14nm Intel® Celeron® N3060 dual-core 1.6GHz (up to 2.48GHz)

Hardware Encryption Accleration

System Memory 4GB DDR3L (2 x 2GB) 2GB DDR3L (2 x 1GB) 4GB DDR3L (2 x 2GB) 2GB DDR3L (2 x 1GB)

Maximum Memory 8GB

Memory Slot 2 x SODIMM DDR3L (For dual-DIMM congurations, you must use a pair of identical DDR3L modules.)

Flash Memory 4GB, pre-loaded with QTS system

Drive Type 2 x 3.5"/2.5" SATA 6Gb/s HDDs/SSDs

GbE LAN 2 x Gigabit RJ45 LAN port

USB Port 3 x USB 3.0 ports (Front: 1, Rear:2)

SD Card Reader

USB QuickAccess Port

HDMI 1, max. resolution 3840 x 2160 @ 30Hz

Audio Input 3.5mm Microphone Input jack (for dynamic microphone)

Audio Output 3.5mm Line Out jack (for ampliers or speakers)

LED Indicator Status/Power, USB, HDD 1, HDD 2 Status/Power, USB, HDD 1, HDD 2, HDD 3, HDD 4

Button Power/Status, USB one-touch-backup, reset

IR Receiver

Others Kensington security slot，system maintenance port

Dimension

Weight

Operating Temperature 0~40˚C

Relative Humidity 5~95% RH non-condensing, wet bulb: 27˚C

Noise Level 18.3 dB (A)* 18.1 dB (A)*

Power Consumption

Power 65W AC power adapter, 100-240V AC 96W AC power adapter, 100-240V AC

Fan 1 x 7cm system fan (12V DC) 1 x 12cm system fan (12V DC)

* Refer to ISO 7779 Maximum HDD loaded ; Bystander Position ; Average data from 1 meter in front of operating NAS.

Model specifications are subject to change without notice. Please refer to www.qnap.com for the latest information.

USB 3.0

168.5 x 102 x 225 mm

6.63 x 4.02 x 8.86 inch (HxWxD)

Net：1.28 kg (2.82 lbs)
Gross：2.64 kg (5.82 lbs)

System sleep：0.72W

HDD standby：7.9W

In operation：16.2W

(with 2 x 2TB HDDs)

(USB 3.0 Micro-B); USB cable is not included



, supports QNAP RM-IR002 and MCE-compliant remote controls





, AES-NI



168.5 x 160 x 225 mm

6.63 x 6.30 x 8.86 inch (HxWxD)

Net：3 kg (6.61 lbs)

Gross：3.6 kg (7.94 lbs)

System sleep：0.65W
HDD standby：12.1W

In operation：27W
(with 4 x 2TB HDDs)

Console port

3.5 mm microphone jack

3.5 mm line out port
HDMI
2 x USB 3.0

2 x GbE

DC Input 12V

Kensington lock

Category Order P/N Description

UX-800P

Expansion units

UX-500P

RAM-1GDR3L-SO-1600 1GB DDR3L RAM, 1600MHz, SO-DIMM

Memory

Remote control RM-IR002 Infrared (IR) remote control (Included)

Systems, Inc.

Systems, Inc.

TEL : [phone] FAX : [phone] Email: [e-mail]

TEL : [phone] FAX : [phone] Email: [e-mail]

Address：3F, No.22, Zhongxing Rd., Xizhi Dist., New Taipei City, 221, Taiwan

Address：3F, No.22, Zhongxing Rd., Xizhi Dist., New Taipei City, 221, Taiwan

Copyright © 2016 QNAP Systems, Inc. All rights reserved.

Copyright © 2016 QNAP Systems, Inc. All rights reserved.

QNAP® and other names of QNAP Products are proprietary marks or registered trademarks of QNAP Systems, Inc. Other products
and company names mentioned herein are trademarks of their respective holders.

QNAP® and other names of QNAP Products are proprietary marks or registered trademarks of QNAP Systems, Inc. Other products

Celeron is a trademark of Intel Corporation in the U.S. and/or other countries.

and company names mentioned herein are trademarks of their respective holders.

Docker and the Docker logo are trademarks or registered trademarks of Docker, Inc. in the United States and/or other countries.

Celeron is a trademark of Intel Corporation in the U.S. and/or other countries.

Docker, Inc. and other parties may also have trademark rights in other terms used herein.

Netherlands

Netherlands (Warehouse Services)

Email:[e-mail]

Email:[e-mail]

TEL:[phone]

TEL:[phone]

India

India

Email:[e-mail]

Email:[e-mail]

(Warehouse Services)

Germany

Email:[e-mail]
TEL:[phone]

US

Email:[e-mail]
TEL:[phone]

7

RAM-2GDR3L-SO-1600 2GB DDR3L RAM, 1600 MHz, SO-DIMM

RAM-4GDR3L-SO-1600 4GB DDR3L RAM, 1600 MHz, SO-DIMM

RAM-8GDR3L-SO-1600 8GB DDR3L RAM, 1600 MHz, SO-DIMM

Germany

Email:[e-mail]
TEL:[phone]

US

Email:[e-mail]

China

Email:
TEL:[phone]

Thailand

Email:[e-mail]
TEL:[phone]

TEL:[phone]

QNAP 8-bay Expansion unit

185.2 x 298.2 x 235.4 mm ,

7.3 Kg 7.29 x 11.74 x 9.27 inch (H x W x D), 16.08 lbs

QNAP 5-bay Expansion unit

185.2 x 210.6 x 235.4 mm , 5.1Kg

7.29 x 8.29 x 9.27 inch (H x W x D), 11.24 lbs

China

[e-mail]

[e-mail]

Email:
TEL:[phone]

Thailand

Email:[e-mail]
TEL:[phone]

Package contentAccessories

• NAS Server

• Ethernet Cable x 2

• AC Adapter and Power Cord

• Quick Installation Guide (QIG)

• Remote Control

• Hot-Swappable HDD trays

• Screws for 3.5" & 2.5" HDD

51000-024118-RS

51000-024148-RS

201607 A