Brand |
QNAP
|
Model |
TS-251B-4G
|
CPU Model |
Intel® Celeron® J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz)
|
Operating System |
QTS 4.3.4 (embedded Linux)
|
System Memory |
System Memory
- 4 GB SO-DIMM DDR3L (1 x 4 GB)
Maximum Memory
- 8 GB (2 x 4GB)
|
Number of Drives |
2 x 3.5-inch SATA 6Gb/s, 3Gb/s
|
USB Interface |
3 x USB 2.0
2 x USB 3.2 Gen 1
|
LAN Interface |
1 x Gigabit Ethernet Port (RJ45)
|
Video |
1 x HDMI Output, HDMI 1.4b (up to 3840 x 2160 @ 30Hz)
|
Audio |
Audio Input
- 2 x 3.5mm dynamic microphone input jacks
Audio Output
- 1 x built-in speaker
- 1 x 3.5mm line out jack (for amplifier or headphone amplifier)
|
Memory Slot |
2 x SO-DIMM DDR3L
|
Buttons |
Power, USB copy, Reset
|
Networking |
1. TCP/IP: Dual stack (IPv4 and IPv6)
2. Jumbo frame (failover, multi-IP settings, port trunking/NIC teaming)
3. DHCP server and client
4. USB Wi-Fi adapter
Note: This feature does not support ad hoc networks because of security considerations.
5. Virtual switch
- Virtual switch editing in Virtualization Station
- Combining virtual machines and containers in the same virtual switch
- Network Address Translation (NAT)
- Spanning Tree Protocol (STP)
6. WirelessAP Station
|
Security |
1. Network access protection with auto-blocking (SSH, Telnet, HTTP(S), FTP, CIFS/SMB, and AFP)
2. Host access control for shared folders (CIFS/SMB)
3. AES 256-bit folder-based and volume-based encryptions which are validated by FIPS 140-2 CAVP (Cryptographic Algorithm Validation Program)
4. 256-bit external drive encryption (AES)
5. Importing of SSL certificates from Let’s Encrypt
6. Instant alerts through email, SMS, push service, and audio
7. 2-step verification
|
Management |
- Storage Management
- Power Management
- Access Rights Management
- Transcode Management
|
File system |
1. Internal hard drive (EXT4)
2. External hard drive (EXT3, EXT4, NTFS, FAT32, HFS+, and exFAT)
Note: To use exFat you must purchase an exFAT driver license from License Center.
|
Cooling Fans |
1 x 70mm, 12VDC
|
Power Supply |
65W adapter, 100-240V
|
Power Consumption |
HDD Sleep Mode : 8.08 W
Operating Mode, Typical : 15.25 W
|
Environment |
Operating temperature0 - 40 °C (32°F - 104°F)
|
Packaging Content |
TS-251B
Ethernet Cable
AC Adapter
Power Cord
Flat head screw (for 3.5" HDD)
Flat head screw (for 2.5" HDD)
|
Dimension |
(W x D x H) : 10.50 x 22.00 x 16.80 cm |
Net Weight |
1.53 KG |
warranty |
-
|