Hi there, I'm Ryan, I'll be working with you on this issue.
Green (flashing) - On power-up blinks rapidly for 5 seconds; a user can escape to
access the boot mode from the console port at this time.
Green (solid) - Power is on and the self-test completed successfully.
Red (solid) - Power is on but the self-test failed or the boot code could not be loaded.
Green (solid) - DIM is in a ready state.
Green (slow flashing) - the unit is initiating a dial backup call.
Green (fast flashing) - the unit is in dial backup.
Red (solid) - Alarm condition is occurring on the DBU interface or there is a self-test
Amber (solid) - the unit is in a test state.
Off - No DIM is installed.
Green (solid) - Link is up and port is operational.
Green (flashing) -- Port has activity (transmit or receive).
Red (solid) - Alarm Condition is occurring on the WAN Interface, or there is a self-test
Amber (solid) - The unit is in a test state.
Off - No NIM is installed or the interface is administratively down.
Green (solid) -- WLAN card is enabled and active.
Amber (flashing) -- Activity (transmit or receive) is detected on the WLAN.
Off -- WLAN is inactive or disabled.
PoE (if applicable):
Green (solid) -- Power is being applied (48 V) to the interface.
Red (solid) -- Fault is detected on the interface.
Ethernet (ports 1 - 24):
Green (solid) -- Port is enabled and has a connection.
Amber (flashing) -- Port has activity (transmit or receive).
Off -- Port is administratively disabled or does not have a connection.
G 1/2 (Gigabit Eth):
Info is from Adtran's website. See link: http://kb.adtran.com/display/2/searchDirect/?searchString=1335+lights&searchType=allwords&searchby=keywords&r=0.7017786