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GTM-204M-4G Quick Start v1.0 2016/06
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Quick Test
Step 1: Start → All Programs → Accessories → Communications → Hyper Terminal →
Input new connection name → Click "OK" → Select "GTM-204-4G AT command Port" for
USB or your PC serial port for RS-232 communication → Click "OK"
Step 2: File → Properties → Settings → Click "ASCII Setup..." → Select "Echo typed
characters locally" → Click "OK"
Step 3: Input "AT" and press "Enter", then you will receive "AT OK".
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