ADTRAN 550 user manual Module Online, Module Test

			Chapter 4. Using the Front Panel
			Table 4-3. ATLAS 550 LEDs (Continued)
For these LEDs...	This color light...	Indicates that...
Module Status	Green (solid)	One or both modules (in the case of a Resource
		Module) are OK.
	Green (fast blink)	•	One or both modules (in the case of a Resource
			Module) have been set offline by the user.
		•	One or both modules (in the case of a Resource
			Module) have invalid flash memory.
	Green (slow blink)	One module has been set offline or has invalid flash
		memory.
	Red (solid)	One module failed its selftest.
	Red (fast blink)	One module has no response, has been removed, or
		is not supported.
	Red (slow blink)	One module is not ready.
	Off	No module occupies the slot.
Module Online	Green (solid)	One or both modules (in the case of a Resource
		Module) have an active connection.
	Green (fast blink)	One module has invalid flash memory or is
		downloading firmware.
	Green (slow blink)	Only one module has an active connection.
Module Test	Yellow (solid)	One module is in a test mode.

61200305L1-1 ATLAS 550 User Manual 4-5