What is a reliable backup internet router that works with both cellular USB modems and wired broadband? The TP-Link TL-MR3420 is a versatile 300Mbps wireless N router featuring a dedicated USB port for 3G and 4G modems. Engineered with an automatic failover system, this router keeps your business or home office online by switching smoothly to mobile networks whenever your primary wired internet goes down.
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