LT-AS0420V 4+2 Port Unmanaged PoE Switch – Product Overview
The LT-AS0420V is an unmanaged PSE PoE switch from NEWBRIDGE® designed for small surveillance and network applications. It features 4× 10/100Mbps PoE ports (IEEE 802.3af/at, up to 30W per port) and 2× 10/100Mbps uplink ports – all 6 ports work simultaneously.
With a total PoE budget of 65W, built-in intelligent PoE priority mechanism, watchdog on ports 1‑4 (auto‑restarts unresponsive devices after 2 minutes), OVP (Over Voltage Protection), short‑circuit protection, 4KV lightning protection on both ports and power supply, 250‑meter long‑range transmission (reduces ports 1‑4 to 10Mbps), and VLAN isolation mode (isolates ports 1-4 from each other while keeping communication with uplink ports).
Housed in a fanless galvanized steel metal case, this plug‑and‑play switch is ideal for IP cameras, VoIP phones, and small wireless APs in home or office environments.
Key Features
🔌 PoE+ with 65W Budget, Priority & Protections
IEEE 802.3af/at compliant (up to 30W per port), total PoE budget 65W.
Intelligent PoE priority mechanism – when remaining power is low, high‑priority ports are guaranteed power to prevent overload.
OVP (Over Voltage Protection) – safeguards the switch and connected devices from voltage spikes.
Short‑circuit protection built‑in for safe operation.
4KV lightning protection on both PoE ports and power supply.
🔁 Watchdog Auto‑Recovery (Ports 1‑4)
Continuously monitors data communication status on all 4 PoE ports.
If a connected camera or device stops working for 2 minutes, the corresponding port automatically restarts to restore operation – no manual intervention needed.
📡 Long‑Range & VLAN Mode (DIP Switch)
Long‑Range Mode: Reduces ports 1‑4 to 10Mbps, extending transmission distance up to 250 meters over standard Cat5e/6 cable – perfect for large sites or aging cabling.
VLAN Mode: Isolates ports 1‑4 from each other (they only communicate with uplink ports 5‑6), reducing broadcast storms and preventing DHCP conflicts.
⚡ High-Performance Switching
6 × 10/100Mbps ports, all support non‑blocking wire‑speed forwarding.
Switching capacity: 1.6Gbps; throughput: 0.8928Mpps; MAC table: 1K; packet buffer: 768K.
Supports IEEE 802.3x flow control and backpressure.
🔌 Plug‑and‑Play & Reliable Hardware
No configuration required. LED indicators for power (PWR), link (Link), PoE status, and extend mode.
Fanless silent design, galvanized steel metal shell, excellent heat dissipation.
Operating temperature: 0℃～55℃; storage: -40℃～70℃.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LT-AS0420V |
| Ports | 4× 10/100Mbps PoE ports + 2× 10/100Mbps uplink ports |
| PoE Standard | IEEE 802.3af/at (up to 30W per port) |
| Total PoE Budget | 65W |
| PoE Priority | Yes (intelligent priority mechanism) |
| Watchdog | Yes (ports 1-4, auto-restart after 2min failure) |
| PoE Pin Assignment | 1/2(+), 3/6(-) (4‑core power) |
| OVP | ✅ Supported |
| Short-Circuit Protection | ✅ Supported |
| Lightning Protection | 4KV (ports & power) |
| Long-Range Distance | Up to 250m (10Mbps mode) |
| VLAN Mode | Ports 1‑4 isolated, communicate with ports 5‑6 |
| Switching Capacity | 1.6Gbps |
| Throughput | 0.8928Mpps |
| MAC Table | 1K |
| Packet Buffer | 768K |
| Forwarding Mode | Store‑and‑forward (full wire speed) |
| Power Input | AC 110-240V, 50-60Hz (internal 65W) |
| Operating Temperature | 0°C ~ 55°C |
| Storage Temperature | -40°C ~ 70°C |
| Dimensions (L×W×H) | 190×125×38mm |
| Weight | 0.78kg |
| Housing | Galvanized steel, fanless |
| Installation | Desktop |