Model Remote Offices/Small Businesses (SBs)
USG 20W USG 20
Hardware Specifications
10/100/1000 Mbps RJ-45 ports 4 x LAN/DMZ, 2 x WAN 4 x LAN/DMZ, 2 x WAN
Gigabit combo (SFP/RJ-45) port - -
USB ports 1 1
SEM slot (Security Extension Module) - -
Fanless - -
System Capacity & Performance*1
SPI firewall throughput (Mbps)*2 175 175
VPN throughput (Mbps)*3 75 75
UTM throughput (AV and IDP)*4 - -
Unlimited user licenses Yes Yes
Max. TCP concurrent sessions*5 10,000 10,000
New TCP session rate 1,000 1,000
Max. concurrent IPsec VPN tunnels 5 5
Max. concurrent SSL VPN users 1 1
Included SSL VPN user no. 1 1
Customizable zones Yes Yes
IPv6 support Yes Yes
WLAN Management
AP controller (APC) ver. - -
Managed AP number (default/max.) - -
Wireless Specifications
Standard compliance 802.11 b/g/n -
Wireless frequency 2.4 GHz -
Radio 1 -
Maximum transmit power
(Max. total channel)
US (FCC) 2.4 GHz 26.6 dBm, 2 antennas -
US (FCC) 5 GHz - -
EU (ETSI) 2.4 GHz 19.1 dBm(EIRP), 2 antennas -
EU (ETSI) 5 GHz - -
No. of antenna 2.4 GHz: 2T2R MIMO -
Antenna gain 2 dBi  
Data rate 802.11b/g: 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48 and 54 Mbps -
Data rate 802.11n: up to 300 Mbps in MCS15 (40 MHz; GI = 400 ns)
Key Software Features
Virtual private network (VPN) Yes (IPSec, SSL, L2TP over IPSec) Yes (IPSec, SSL, L2TP over IPSec)
Firewall Yes Yes
Anti-virus (AV) - -
Anti-spam Yes Yes
Content filtering (CF) Yes Yes
Application intelligence and control - -
Intrusion detection and prevention (IDP) - -
SSL inspection - -
Single sign-on (SSO) - -
WLAN controller - -
Power Requirements
Power input 100 - 240 V AC, 50/60 Hz, 1.5 A max. 100 - 240 V AC, 50/60 Hz, 1.5 A max.
Max. power consumption (watt) 16 15
Physical Specifications
Item Dimensions (WxDxH) (mm/in.) 216 x 140 x 33/8.50 x 5.51 x 1.30 216 x 140 x 33/8.50 x 5.51 x 1.30
Weight (kg/lb.) 0.42/0.93 0.38/0.84
Packing Dimensions (WxDxH) (mm/in.) 305 x 205 x 106/
12.01 x 8.07 x 4.17
305 x 205 x 106/
12.01 x 8.07 x 4.17
Weight (kg/lb.) 1.1/2.43 1/2.20
Included accessories •Power adapter
•Ethernet cable
•DB9 - RJ45 cable for console connection
•Antenna
•Power adapter
•Ethernet cable
•DB9 - RJ45 cable for console connection
Environment Specifications
Operation Temperature 0°C to 40°C/32°F to 104°F 0°C to 40°C/32°F to 104°F
Humidify 5% to 90% (non-condensing) 5% to 90% (non-condensing)
Storage Temperature -30°C to 60°C/-22°F to 140°F 30°C to 60°C/-22°F to 140°F
Humidify 5% to 90% (non-condensing) 5% to 90% (non-condensing)
MTBF (hr) 301502 323269
Certifications
EMC FCC Part 15 (Class B), CE EMC (Class B) FCC Part 15 (Class B), CE EMC (Class B)
Safety LVD (EN60950-1), BSMI LVD (EN60950-1), BSMI

Note:
*1: Actual performance may vary depending on network conditions and activated applications.
*2: Maximum throughput based on RFC 2544 (1,518-byte UDP packets).
*3: VPN throughput measured based on RFC 2544 (1,424-byte UDP packets).
*4: UTM (AV and IDP) throughput measured using the industry standard IXIA IxLoad testing tool (1,460-byte HTTP packets).
*5: Maximum sessions measured using the industry standard IXIA IxLoad testing tool.
*6: With firmware ZLD 4.10 or later.