ATM Tips
Issue 4 May 2002
5-71555-233-123
ATM Tips
This section provides tips for DEFINITY ATM PNC when interfacing with the
Cajun A500 ATM switch.
Initial LED inspection
Visually inspect the LEDs on both the TN230X (Table 5-8) and the ATM switch
(Table 5-9) for a high-level status of the system.
Table 5-9 shows the LEDs on the A500 ATM and the meanings of the different
states.
Table 5-8. TN230X LED reference
LED color
Interpretation
Red Green Yellow
Off Off Steady on Normal state for active ATM EI board on PPN.
Off Off Off Normal state for standby ATM EI board on PPN and
EPN.
Off Off 2 sec on /
2 sec off
Normal state for active PNC archangel ATM EI board
on EPN.
- - 100ms on /
100ms off
Loss of signal on the OC-3 fiber. Either the
TN230X-receive (top) or TN230X-transmit (bottom)
fibers are not working.
N/S Fast blink - Running DSP diagnostics or downloading code to
DSPs (typical during boot process).
- Slow blink - Board insertion has not yet completed.
- Steady on - Running maintenance tests. May appear to be blinking
if several short tests are run one after another.
Steady on - - Hardware alarm. Does not necessarily take the
TN230X out of service, for example, if one of the 24
DSPs fails diagnostics.
Table 5-9. A500 LED Quick Reference
Component Label Color State Meaning
Switch
Processor
Board
LK Green Intermittent
blink
Normal state. Traffic is being sent or received
over the Ethernet LAN link.
RX Green Steady on Normal state. Carrier is received over the
Ethernet LAN link.
DIAG Green Off Normal state.
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