Product specifications

24 Issue 3, December 2003 61223006L1-5C

7. TROUBLESHOOTING PROCEDURES

Table 7 is a troubleshooting guide for the

T200 H2TU-C.

Table 7. Troubleshooting Guide

Condition Solution

All Front Panel indicators are Off.

1. Verify that –48 VDC power is properly connected to the shelf.

Inspect the fuse to verify that it is not blown.

3. Insert the H2TU-C into a slot known to be in good working condition, and check the

LEDs.

4. If Steps 1 and 2 pass, but Step 3 fails, replace the H2TU-C.

DSL LED is Solid Red. Loop has poor signal quality or loss of sync. Basic troubleshooting procedures

should identify a potential problem with the cable pair.

DSX/DS1 LED is Solid Red. Errors are being taken on the DSX, DS1 or HDSL2 loop. The craft interface will

identify the source. BERT tests to the appropriate loopbacks should also reveal the

source of the problem.

Alarm LED is Solid Red. Loss of DSX-1 signal to the unit.

Alarm LED is Yellow If customer equipment is not installed, initiate an H2TU-R to Network Loopback and

perform BERT test. If this test fails, or the craft interface indicates a loss of sync,

then there is a potential problem with the cable pair that should be identified through

basic troubleshooting procedures.