Paradyne 3161 - Manual (Page 44)

3. Using the Front Panel
3-6 March 2001 3160-A2-GB24-10
Table 3-1. System LEDs
Name Color Meaning
OK Green Indicates the current operational state of the DSU/CSU.
ON: The DSU/CSU is operational and has power.
OFF: The DSU/CSU is performing a power-on self-test or a
system failure has occurred.
BLINKING: A software download is in progress.
FAST BLINK: The carrier-mounted DSU/CSU is currently
selected by the SDCP.
FAIL Yellow Indicates a system failure or a self-test.
ON: A device error/fault is detected or a reset has just occurred.
OFF: No system failures are detected.
BLINKING: A self-test is in progress.
TEST Yellow A system test is in progress.
ON: A loopback or pattern test has been initiated either locally, by
the network, or externally.
OFF: No tests are active.