BRX-XLR User Guide
35
180-0145-001-R05
amplified by a BRX-XLR module/device at the
same location
If any of these measurements are not met, you
should make the corrections as per your corporate
standard procedure and re-verify.
E. Telephone (POTS) issues
11. Dial tone is intermittent or not
present
You should have the following equipment to help you
troubleshoot the problem:
- Standard Telephone Test set
Note
: Problems with dial tone if almost always
associated with a loop current that is too low. In such
case the DSLAM / CO will not detect the OFF-HOOK
state and won’t apply dial tone to the line.
Disconnecting the house at the NID and with the
BRX-XLR device installed on the copper loop,
verify the presence of a dial tone in OFF-HOOK
state. If there is a steady dial tone, the problem
is with the house wiring. Reconnect the NID to
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-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.
