Positron BRX-VDSL2, User Manual

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BRX-VDSL2 User Guide
7 180-0153-001-R02
2 BRX-VDSL2 Main Advantages

Extends the VDSL2 Customer Serving Area (CSA) by 77-200%.

Improve effective bandwidth of VDSL2 loops.

The BRX-VDSL2 uses the -48V sealing current of the POTS line. When deployed over
dry pairs (no POTS sealing current), it can be powered from the Positron BRX Power
Injector.

The BRX-VDSL2-X requires slightly more power than the BRX-VDSL2. It can operate
over standard POTS sealing current when there is no POTS (dial tone) service.
Otherwise, when operated jointly with a POTS service (dial tone) or when deployed over
a dry pair, it requires the use of the Positron BRX Power Injector

Flexible Shelf design allows more subscribers to be added in the future.

Turnkey pedestal option available.

Auto calibration, no software to configure or dip switch.

Easy to install, deploy, and maintain.
3 Bandwidth Performance and Placement Flexibility
3.1 Expected Bandwidth Improvement with BRX-VDSL2 and BRX-VDSL2-X
Both versions of the BRX-VDSL2 automatically adapt their operation to the actual line conditions to
optimize performance. They provide gain amplification of the signal in the downstream (D1 and D2
bands) and upstream (U0 and U1 bands) direction making sure that the amplified signal is always
within the acceptable spectrum mask and signal strength allowed by the VDSL2 standards. BRX-
VDSL2 devices significantly improve the signal to noise ratio seen by the CPE (in the downstream
direction) and the DSLAM (in the upstream direction).
The table below illustrates a few examples of the bandwidth increases one can expect with the
insertion of a BRX-VDSL2 or BRX-VDSL2-X:
BRX-VDSL2 Downstream Performance Increase (Typical Lines)
NO Vectoring
Total Loop Length
(24 AWG / 0.51 mm)
Not
Amplified
BRX-VDSL2 BRX-VDSL2-X
Feet Meters
DS / US
(Mbps)
DS / US
(Mbps)
Improvement
Ratio
DS / US
(Mbps)
Improvement
Ratio
5000 1524 26.3 / 2.8 33.2 / 6.4 1.26 / 2.29 34.5 / 6.2 1.31 / 2.21
6000 1829 24.1 / 1.3 25.7 / 4.3 1.07 / 3.31 27.8 / 4.2 1.15 / 3.23
6500 1981 21.1 / 1.3 21.8 / 2.7 1.03 / 2.08 25.0 / 3.3 1.18 / 2.54
Table 2: Downstream Performance Increase Examples (Typical Lines)
– NO Vectoring