How it works
The Positron Access Solutions BRX-XLR is a next generation performance and distance (reach) enhancement solution for any ADSL / ADSL2+ loops served by a DSLAM. The BRX-XLR is installed between the DSLAM (typically around 8,000 to 12,000 feet / 2.4 to 3.7 km from the DSLAM) and the remote user locations and improves by two to five times the overall performance. 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-XLR is designed to deliver a minimum of 10 Mbps on an ADSL2+ pair at a distance of 17,000 feet (5.2 km) on 24 AWG copper pairs. It is being used for a multitude of applications and it is particularly well suited in underserved or unserved markets. An increase in the available bandwidth capacity on existing last mile infrastructure results in higher ARPU, lower attrition and increased customer satisfaction.
BRX-XLR Bandwidth Improvement
BRX-XLR significantly extends the Customer Serving Area (CSA) providing a superior Signal to Noise Ratio (SNR) to subscribers and delivering more bandwidth (Downstream and Upstream).
The bandwidth improvement ratio increases progressively on longer loops. For example at 16 kft the BRX-XLR will improve the bandwidth by 2 times, and at 25 kft the BRX-XLR will improve the bandwidth by more than 4 times.
Expanding the CSA By 100%
The BRX-XLR facilitates the use of a multi-pair enclosure or cabinet to provide target bandwidth at various distances in a large serving area. There are no minimum distance limitations on the L2 segment and full coverage is provided in the existing and extended serving area.
BRX-XLR Solutions
The BRX-XLR is designed to fit seamlessly in the copper OSP. It is offered in various form factors including a self-contained 1-pair and 2-pair enclosures and flexible 24 or 48 pair enclosures for higher-density areas. These solutions come in a variety of weather resistant enclosures (IP-65) or in flexible enclosures designed to seamlessly fit in most pedestal and cabinets used by operators. They can also be easily mounted on a pole or on the outside of an existing cabinet.
Standalone BRX-XLR Units in flexible 1 or 2 pair units
The BRX-XLR-1 is a single pair unit ideal to serve isolated users. The BRX-XLR-2 is a 2-pair unit that can serve two different customers or a single customer when bonding 2 pairs together for higher bandwidth.
The BRX-XLR-1 and BRX-XLR-2 share the same enclosure and come with embedded gas tube protection for lightning protection. The enclosure is designed for easy installation on a pole, inside or on the outside of a pedestal or on a wall. An optional strand mounting bracket is also available.
BRX-XLR-24
The BRX-XLR-24 holds 12 BRX-XLR 2-pair modules (with primary lightning protection) for a total of 24 ports / copper pairs. The BRX-XLR-24 comes with a pair of standard 25-pin Amphenol connectors (24 pairs) from the CO/DSLAM and 24 pairs toward the subscriber CPE devices. It includes an optimal pole-mount bracket.
BRX-XLR-24-1S and BRX-XLR-48-1S
The BRX-XLR-24-1S incorporates a BRX-XLR-24-S factory installed in an Emerson CAD-12 pedestal to serve up to 24 ADSL / ADSL2+ subscribers in a customer service area (CSA) with enough room to handle a 100-pair binder from the Central Office (CO or Exchange) and a 100-pair binder toward the subscriber CPE devices.
The BRX-XLR-48-1S incorporates two BRX-XLR-CAB-24-S factory installed in an Emerson CAD-12 pedestal to serve up to 48 ADSL / ADSL2+ subscribers in a customer service area (CSA) with enough room to handle a 100-pair binder from the Central Office (CO or Exchange) and a 100-pair binder toward the subscribers.
BRX-XLR Bandwidth Calculator
The BRX-XLR calculator is a tool, which enables to calculate:
- The achievable bandwidth based on the location of the BRX-XLR (from the DSLAM) and the distance to the subscriber CPE.
- The optimal bandwidth for a specific total loop length and gauge of wire and recommend the location where the BRX-XLR should be installed (usually a range of distances from the DSLAM) to achieve the target bandwidth.
- The best placement of a BRX-XLR cabinet to achieve a target bandwidth to multiple subscribers over a total loop length. This is useful to determine the Customer Serving Area (CSA) for a given access speed tier.
The BRX-XLR calculator is available in through our Portal (registration is required to access the Portal).
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Resources
Last Mile Bandwidth Enhancement
As published in Broadband Communities: Positron’s BRX line amplifiers double the serving area on long copper loops where fiber is not cost effective. Years of development and thousands of units in operation at 200 carriers has resulted in a very robust reliable solution that has significant placement flexibility and operates on line current.
BRX Solution Brief
While subscribers in many urban areas have access to 50-100 Mbps services or higher this is not the case in suburban and rural markets where subscribers cannot get higher speeds and are unable to access more advanced services and applications. Regulators are setting new targets for broadband access.