ADTRAN 1187715G1, Installation And Maintenance Manual

Page: 51 / 62

Troubleshooting
61187715G1-5B 41
Faults Indicated with LEDs
Begin troubleshooting at the ONT by checking to see if all LEDs are in their normal state,
shown in Table 7 on page 39. There are separate LEDs for each Ethernet RJ ‐ 45 jack that appear
on the SFU circuit board. If the LEDs are in their normal state, refer to “LEDs in Normal State”
on page 41. If the LEDs are in a fault state, refer to “LEDs in Fault State” below.
LEDs in Normal State
If the LEDs are in the normal state but you are still having problems, complete the following
troubleshooting steps:
1. If the trouble is of a random or intermittent nature, check for loose or broken connections
at the common mounting platform.
2. If the trouble is solid, remove the Customer Provided Equipment (CPE) wiring and
complete the following tests:
• POTS tests described in “Test for POTS Line Faults” on page 39.
• Ethernet tests described in “Provision Ethernet Interface at OLT” on page 40. Verify
the OLT can run and pass the loop ‐ back tests for the Ethernet port.
If the above tests are successful, the indication of the trouble is directed back toward the
CPE wiring/equipment.
LEDs in Fault State
Descriptions of each LED are listed in Table 7 on page 39 with possible causes for fault LED
conditions. A flow chart for troubleshooting the problem for each fault condition is provided
in “ONT Trouble Isolation” below.
ONT Trouble Isolation
This section describes how to isolate problems based on faults reported through LEDs:
• “UPS Power LEDs” on page 42
• “Network Status LED Off” on page 43
• “POTS Troubleshooting” on page 44