BRX-VDSL2 User Guide
18
180-0153-001-R02
6 Installation and Operating Guidelines
6.1
General Requirements for the Outside Plant (OSP)
The BRX-VDSL2 devices are designed to be installed and operated as per the same guidelines and
standard operating procedures used for typical VDSL2 loops.
Qualify/Condition the Line:
the copper loops must be qualified and conditioned for VDSL2
installations according to standard operator guidelines
Loaded/Non-loaded Loops.
Loops should be non-loaded although the BRX-VDSL2 device
can operate with VDSL2-compliant loading coils
Bridged Taps
: all bridged taps should be removed for optimum performance
Insulation Resistance:
Tip-Ring, Tip-Ground and Ring-Ground Insulation Resistance should
be greater than 5 Meg-Ohms
Longitudinal Balance.
Longitudinal balance should be greater than or equal to 60 dB
System Ground:
perform system ground per local company policies and practices
Loop Resistance:
the actual loop resistance between the DSLAM and the BRX-VDSL2
device should be verified at the time of the splicing
No Split Pairs:
ensure that the path does not have “split pairs” (tip on one pair and ring on the
other) as it will induce plenty of crosstalk.
You should follow established standards for pair validation. The following check list can also be used
to validate the pair(s).
Test & Pass / Fail Criteria
Results
Power Influence - < 80 dBrnC
Noise - < 20 dBrnC
Tip to Ground, ≤ |1.0 VDC
Tip to Ring: 0 VDC
Tip to Ground: < 5 VAC (should match Ring to Ground AC Voltage)
Ring to Ground: : < 5 VAC (should match Tip to Ground AC Voltage)
Tip to Ground Insulation Resistance Ohms ≥ 5 MΩ
Ring to Ground Insulat
ion Resistance Ohms ≥ 5 MΩ
Tip to Ring Insulation Resistance Ohms ≥ 5 MΩ
Longitudinal Balance ≥ 60 dB
Load coils - If required, only use SMART Loading Coils
Bridge Tap: No bridge tap should be found
Important Note: Please make sure the Test Set is set to VDSL2 Mode
Table 5: Pre-installation checklist
