Geetel INTERNET DSL MODEMS Handbook page 7

If your Geetel DSL modem is a black Comtrend AR-5381u wireless modem/router
combination, the lights across the front of the modem are as follows:
POWER: This is the power light. It will remain solid telling you the power is on.
ETH 1, 2, 3, 4: The 4 lights represent your equipment. There are 4 yellow ports on
the back of the modem where you can plug your equipment in using Ethernet