AT&T Gateway blinking green Light — Meaning & Fixes
blinking green on AT&T Gateway: A blinking green light on the AT&T Gateway means it is actively trying to connect to AT&T Internet.
A blinking green light on the AT&T Gateway means it is actively trying to connect to AT&T Internet. This is normal during startup and usually turns solid once the connection is established.
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Most likely causes
AT&T Gateway is synchronizing with AT&T Internet
The device was just restarted
The line is renegotiating after an outage
A weak upstream signal is slowing the sync
Try this first
Wait 2–5 minutes for the light to turn solid
If it blinks for more than 10 minutes, power-cycle the AT&T Gateway
Reseat all cables connected to the AT&T Gateway
Verify there is no AT&T Internet outage in your area