A red service light means that your at t provided router gateway is not permitted to access the at t network.
At and t solid red service light.
If your lights aren t green you may have a problem getting a signal or your gateway may be having a problem.
Red lights indicate some type of hardware failure so you should note and troubleshoot some of the behaviors of your wi fi gateway lights.
The gateway or power supply may be malfunctioning.
Device attempted to become ip connected and failed no dhcp response 802 1x authentication failed no ip address from ipcp etc.
If your gateway power light is amber.
Voip not in use line not registered or gateway power off.
This could be because of an outage or a billing issue.
The gateway has been trying to connect to our network for more than three minutes.
Light should stay red for 5 minutes or until the button is pressed again.
The gateway is starting.
The connection is active.
Flashing green and red.
If the internet or service light on your modem is solid red it means your modem can not detect a dsl signal.
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If your gateway service light if applicable doesn t turn solid green during power up.
Sometimes simply shutting off and re starting your modem will reset your connection.
Flashing red continues for 2 minutes indication a session overlap was detected.
Off gateway is ready for wps authentication.
A software update is in progress.
The power is on.
The red state times out after two minutes and the service indicator light returns to the off state.
Solid red error unrelated to security such as failure to find a partner or wps is disabled.
Don t unplug the power or remove the battery until the update is complete.
If the light is still red contact at t technical support.
This is a possible security risk.
Unplug the gateway power cord for 15 seconds then plug it back in.
To solve this problem.
The gateway can t connect to our network or isn t detecting a dsl signal.
The gateway has obtained an ip address from our network.
Allow at least two minutes to reboot.
Solid red and green lights i get an immediate solid red and solid green light.
Confirm the power broadband and service lights on your gateway are green.