TP-Link MA260 - 1.5 Hardware Overview

MA260 3G HSPA+ USB Adapter User Guide
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1.5 Hardware Overview
LED Explanation:
Status Indication
Solid Red The Adapter is initializing.
Flashing Red No SIM/USIM card is inserted.
Flashing Green The SIM/USIM card has registered to the network.
Solid Green The network is available with a successful Internet connection.