BRX-VDSL2 User Guide
34
180-0153-001-R02
the house and follow corporate practice to rectify
the issue.
Using the telephone test set, verify that the loop
current at the DSLAM pair of the BRX-VDSL2
when in the OFF-HOOK state is high enough
(>16 mA). If not, verify the cabling between the
DSLAM and the BRX-VDSL2.
Using the telephone test set, verify that the loop
current at the CPE pair of the BRX-VDSL2 in the
OFF-HOOK state is high enough (> 10mA) and
that the voltage on the DSLAM BRX-VDSL2 pair
is greater than 30VDC. If one of these two
conditions is not met, the BRX-VDSL2 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 (> 10mA). If
not, there may be issue in the cabling from the
BRX-VDSL2 to the NID.
Note:
please note that the BRX-VDSL2-X series of
VDSL2 amplifiers require the use of the Positron
BRX Power Injector to properly support concurrent
operation with a POTS service.
If any of the above measurements are not met, you
should make the corrections as per your corporate
standard procedure and re-verify.
13. 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
