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| Model | HG6821M |
| Out Port contains | 4GE+1TEL+2USB+Dual Band WiFi |
| WIFI signal | 2.4G & 5G WiFi |
| Wireless gain | 5dBi |
| USB | USB2.0 |
| LAN | 4*10/100/1000Mbps adaptive Ethernet ports, full/half duplex, RJ45 interface |
| TEL | H248/Sip Voice protocol |
| PPPOE/DHCP/Static/Bridge | Support |
| Firmware | English |
| Dimension/weight | 280mm*173mm*42mm/419g |
| Fiber port | 1 GPON interface, single-fiber, Downstream rate 2.5Gbps, Upstream rate 1.25Gbps |
| Wavelength | Tx 1310nm, Rx 1490nm |
| Fiber interface | SC/FC-UPC/APC Dual mode/Single mode |
| RX sensitivity | >-28dBm (1490nm) |
| DC power | 12V 2.0A, external AC-DC power adapter |
| Button | Reset, power, WPS, Wireless |
| Operation | Working temperature: -5 to +55°C, working humidity: 10-90% (non-condensation) |
| Storage | Storage temperature: -30°C to +60°C, storage humidity: 10-90% (non-condensation) |