BRX-XLR User Guide
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180-0145-001-R01
9 Troubleshooting Guidelines
Please use the following table of common issues and suggested resolution whenever you are
experiencing issues with the BRX-XLR.
NOTE:
When using an ADSL2+ or ADSL Tester, you should set the test set to the suggested Profiles
as per Annex C.
Problem Description
Possible cause(s)
A. Problem with ADSL2+ / ADSL training
1. Upon installing the BRX-XLR, the
DSLAM and CPE are no longer able
to achieve synchronization
Verify that DSLAM and CPE pairs are not
mistakenly swapped. Only the pair labelled
DSLAM can be used to power the BRX-XLR
device.
Verify that there is POTS voltage on the DSLAM
pair to power the BRX-XLR.
With the POTS circuit in the ON-HOOK state, the
voltage measured between TIP and RING on the
DSLAM pair at the BRX-XLR should be greater
than |35Vdc|.
If any of these measurements are not met, you
should make the corrections as per your corporate
standard procedure and re-verify.
2. The user CPE loses synchronization
with the DSLAM after the link was
stable for at least several minutes
You should have the following equipment to help you
troubleshoot the problem:
- ADSL2+ Test Set from vendors such as: JDSU,
EXFO …
- Standard Telephone Test set and/or voltmeter
-Disconnecting the house from the xDSL copper
pair(s) at the NID, verify the synchronization with
the DSLAM using the ADSL2+ test set is
achieved and stable.
If the synchronization works well, the problem is
likely with the in-house wiring or CPE. You
should follow standard company practice for this
type of problem
if the ADSL2+ test set fails to establish steady
synchronization with the DSLAM, record the
following information during synchronization
events before contacting the support desk of
Positron Access Solutions:
