AT&T Gateway US/DS lights blinking Light — Meaning & Fixes
US/DS lights blinking on AT&T Gateway: On cable modems like the AT&T Gateway, the US (upstream) and DS (downstream) lights blinking together mean the modem is scanning for and locking onto the AT&T Internet cable signal..
On cable modems like the AT&T Gateway, the US (upstream) and DS (downstream) lights blinking together mean the modem is scanning for and locking onto the AT&T Internet cable signal.
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Most likely causes
The modem is searching for the cable signal
The coax cable is loose or damaged
A AT&T Internet outage or signal problem at the tap
The modem is not provisioned
Try this first
Wait up to 10 minutes for the lights to lock solid
Finger-tighten the coax cable on the AT&T Gateway
Check for damaged coax or splitters
Power-cycle the AT&T Gateway
Check AT&T Internet outage status
If US/DS never lock, contact AT&T Internet — signal or provisioning issue