ADTRAN ATLAS 800PLUS, User Manual

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61200226L1-1 ATLAS 800
PLUS
User Manual B-1
Appendix B
Troubleshooting
Table B-1.
Troubleshooting
SYMPTOM POSSIBLE CAUSES TROUBLESHOOTING TIPS
Power-up Self-Test
Fails Modules seated improp-
erly, module failure Remove all modules and cycle power to the unit.
If self-test still fails, call Technical Support and
report the results. If the self-test now passes, re-
insert modules one at a time, running the self test
after installing each module. When an installed
module causes the self-test to fail, note it and
report results to tech support.
System Timing
Source Unlocked
(displayed on Ter-
minal Interface,
“System Status”) Selected Timing Source is
not present or clock is out
of tolerance • Verify that system timing is correctly configured
for the desired clock.
• Verify that the interface cable to clock source is
present.
• Temporarily configure the system to operate off
of internal timing. Verify that the system can lock
to this clock.
Cannot pass data
from T1 interface
to V.35 port Misconfiguration, improper
cabling • Verify that the T1 signal is being received. If not,
check that the cabling is correct.
• Verify that the T1 is being received without er-
rors. If not, double-check that framing and cod-
ing are set properly.
• Verify that desired dedicated map is active.
• Verify that bandwidth is mapped to the correct
V.35 port.
• Verify that the V.35 port is set to the correct data
rate (terminal interface).
• Check T1 performance using the terminal inter-
face; if excessive errors, report fault to the Telco.
• Verify proper state of DTE signals via the termi-
nal interface or the LCD front panel.