BRX-VDSL2 User Guide
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180-0153-001-R02
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General Description
The Broadband Reach eXtender
– VDSL2 (BRX-VDSL2) is a fully integrated solution that increases
the bandwidth and/ or extends the reach of DSLAMs or MSANs to deliver higher bandwidth
services to underserved or unserved markets. For example, it extends the reach of a 25 Mbps
downstream / 3 Mbps upstream service from 4,000 feet (1.2 km) to 6,000 feet (1.8 km) on 24 AWG
/ 0.51mm gauge copper, an increase of almost 50%, and the same level of increase is achieved for
larger size cables. Furthermore, this 50% increase in reach results in an estimated 100% increase
in CSA (Customer Serving Area) since the area served is proportional to the square of the lineal
distance.
It is important to note that these benefits are obtained without the need to change the
DSLAM/MSAN or the user CPE. By significantly increasing the effective bandwidth and reach of
existing xDSL lines, operators can deliver true broadband speeds to each of their subscribers, even
those located in remote areas or currently located too far from the DSLAM to receive any service.
The BRX-VDSL2 comes in two (2) versions. While they perform the same amplification function
and can be used for most of the same applications, their design is optimized as per the following
table.
FEATURE
BRX-VDSL2
BRX-VDSL2-X
Amplification Range
4000-8500 feet (24 AWG)
4000
– 10000 feet (24 AWG)
Max Loop Length for 25 / 3
Mbps on single pair (24
AWG)
6000 feet (Non-Vectored and
Vectored)
6500 feet (Non-Vectored and Vectored)
Max Distance for 50 / 8 Mbps
on bonded pairs (24 AWG)
6000 feet (Non-Vectored and
Vectored)
6500 feet (Non-Vectored) and Vectored)
VDSL2 range extension
Up to 1500 feet
Up to 2250 feet
CSA Expansion
77%
200%
Amplification ratio
Up to 1.2 Downstream / up to 4.0
Upstream
1.2 to 1.9 Downstream / up to 4.1
Upstream
Form Factor
Same form factor, each pair has 2 LEDs to indicate presence of current and loop
status
Enclosure Options
Available in 1, 2, 8, 24 and 48 pairs enclosures
Management
Manageable (Detection, Location, Alerting, Troubleshooting) with integration with
ASSIA DSL Expresse and with Nokia Network Analyzer Copper (NAC)
Operation over POTS pairs
100% compatible with presence of
active POTS line. Limited current
consumption to guarantee 100%
compliance with POTS devices
Requires BRX Power Injector to
guarantee 100% compliance with POTS
devices
Operation over Dry pairs
BRX Power Injector can be used to power the BRX-VDSL2 devices when
operating on dry pairs (no -48Vdc sealing current present)
Table 1: Summary feature comparison of BRX-VDSL2 and BRX-VDSL2-X
