BRX-XLR User Guide
32
180-0145-001-R01
Using the telephone test set, verify that the loop
current at the DSLAM pair of the BRX-XLR when
in the OFF-HOOK state is high enough (>
20mA). If not verify the cabling between the
DSLAM and the BRX-XLR.
Using the telephone test set, verify that the loop
current at the CPE pair of the BRX-XLR in the
OFF-HOOK state is high enough (> 20mA) and
that the voltage on the DSLAM BRX-XLR pair is
about 20VDC. If one of these two conditions is
not met, the BRX-XLR is in fault. Please reach
out to Positron Access Solutions customer
support for assistance.
Using the telephone test set, verify that the loop
current at the CPE pair at NID location in the
OFF-HOOK state is high enough (> 20mA). If
not, there may be issue in the cabling from the
BRX-XLR to the NID.
If any of the above measurements are not met, you
should make the corrections as per your corporate
standard procedure and re-verify.
12. The telephone (POTS) does not ring
Verify that the correct grade of lightning
protectors have been installed at the NID.
Improper grade may clip the ringing signal.
Verify that the lightning protectors at the NID are
in good working condition. Blown protectors
would short the line making the POTS
malfunction.
Note the REN number for each phone connected
to the line and sum them all. If the sum is higher
than 5, the high number of phones is loading the
line during ringing phase. Disconnect phones one
by one until the number get below 5.
While ringing, measure the AC rms voltage at the
NID. The reading should be between 40Vrms to
105Vrms
13. There is a humming noise on the
telephone (POTS) that was not
present before installing the BRX-
XLR
You should have the following equipment to help you
troubleshoot the problem:
- ADSL2+ Test Set from vendors such as: JDSU,
EX
FO …
- Standard Telephone Test set
With the house disconnected at the NID and the
BRX-XLR installed on the copper pair, verify if
the audible hum noise is still present. If the noise
disappears then the problem is with the house
wiring.
