Zoom X4 - Manual (Page 40)

40 X4 ADSL Modem User’s Manual
The table below defines these front panel lights and how to
interpret them.
Light Description
LAN Lights when LAN connection is active.
RXD Blinks when unit is transmitting or receiving data.
LINK Blinks when unit is performing its startup sequence; stays on
solid when unit is connected to the ADSL line.
PWR Lights when power switch on back panel is turned on.