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BRX-XLR User Guide

180-0145-001-R01

Annex C

Recommended ADSL and ADSL2+ Line Test Profile Parameters

When using an ADSL tester, we recommend you set the device as per one of the following profile.

Setting

ADSL LINE TEST PROFILE

Transmission System

G.992-1

Trellis Coding

Enabled

Reed Solomon

Enabled

S=1/2

Enabled

SRA

Disabled

SRA Downshift Interval

30 seconds

SRA Upshift Interval

30 seconds

PARAMETER

DOWNSTREAM

UPSTREAM

Maximum Bitrate

8192 Kbps

1024 Kbps

Minimum Bitrate

32 Kbps

Maximum Delay

20 msec

Impulse Noise Protection (INP)

Maximum SNR Margin

30.0 dB

Target SNR Margin

6.0 dB

Minimum SNR Margin

3.0 dB

SNR Margin Upshift

9.0 dB

SNR Margin Downshift

3.0 dB

Bit Swapping

Enabled

Table 14: Recommended ADSL Test Set Profile

Setting

ADSL LINE TEST PROFILE

Transmission System

G.992-5

Trellis Coding

Enabled

Reed Solomon

Enabled

S=1/2

Enabled

SRA

Enabled

SRA Downshift Interval

30 seconds

SRA Upshift Interval

30 seconds

PARAMETER

DOWNSTREAM

UPSTREAM

Maximum Bitrate

32000 Kbps

1024 Kbps

Minimum Bitrate

32 Kbps

Maximum Delay

20 msec

Impulse Noise Protection (INP)

Maximum SNR Margin

30.0 dB

Target SNR Margin

6.0 dB

Minimum SNR Margin

3.0 dB

SNR Margin Upshift

9.0 dB

SNR Margin Downshift

3.0 dB

Bit Swapping

Enabled

Table 15: Recommended ADSL2+ Test Set Profile

Summary of Contents for BRX-XLR

Page 1: ...BRX XLR User Guide 180 0145 001 R01 BRX XLR Broadband Reach Extender Extra Long Reach User Guide March 2017...

Page 2: ...oration 5101 Buchan Street Suite 220 Montreal Quebec Canada H4P 2R9 Telephone US and Canada 1 888 577 5254 International 1 514 345 2220 Product names other than Positron s mentioned herein may be trad...

Page 3: ...on with non approved equipment or unshielded cables is likely to result in interference to radio television reception Industry Canada The BRX XLR models comply with ICES 003 of the Industry Canada Rul...

Page 4: ...0 EU and 2014 35 EU Fran ais Par la pr sente Positron Access Solutions Corp d clare que les mod les BRX XLR sont conformes aux exigences essentielles et aux autres dispositions pertinentes selon les n...

Page 5: ...s ensure that BRX XLR units are connected to a chassis ground path of 25 ohms or less to avoid damage to the equipment from lightning strikes and other electrical surges Use of this product in a manne...

Page 6: ...ines 14 4 Technical Specifications 16 5 Packaging Information and Port Density 17 6 Installation and Operating Guidelines 18 6 1 General Requirements for the Outside Plant OSP 18 6 2 POTS Voice Lines...

Page 7: ...ors 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 2 BRX XLR Main Advantages Exten...

Page 8: ...e ratio is calculated as the bandwidth using the BRX XLR divided by the RAW bandwidth i e without BRX XLR For instance improving a pair from 5 Mbps to 10 Mbps would represent a Bandwidth Improvement R...

Page 9: ...48 26 0 40 8 98 14 42 1 61 12 000 3 658 26 0 40 5 87 12 20 2 08 14 000 4 267 26 0 40 3 30 9 57 2 90 16 000 4 877 26 0 40 1 93 6 96 3 61 18 000 5 486 26 0 40 1 07 4 40 4 11 Table 1 Downstream Performan...

Page 10: ...BRX XLR User Guide 9 180 0145 001 R01 Figure 3 Bandwidth vs Loop Length feet with and without BRX XLR Figure 4 Bandwidth vs Loop Length meters with and without BRX XLR...

Page 11: ...support a 10Mbps downstream target bandwidth on a single copper pair for the three most popular cable sizes Table 2 Maximum Distance for 10Mbps Service with 1 pair Similarly the following table provid...

Page 12: ...mm loop of 12 500 feet 3 8 km placing the BRX XLR anywhere between 6 000 feet 1 8 km and 9 000 feet 2 7 km away from the DSLAM will deliver 10 Mbps to the customer In fact the BRX XLR is designed to o...

Page 13: ...e meters 3 4 Optimum Placement Although the placement of the BRX XLR is very flexible the curves in section 3 3 above demonstrate that there is value in properly planning the placement to optimize per...

Page 14: ...midpoint of the loop as the total loop length increases Having said that service providers have a finite amount of locations per loop where they can install the BRX XLR which will not always be at th...

Page 15: ...alled usually a range of distances from the DSLAM to achieve the target bandwidth Calculate the best placement of a BRX XLR cabinet to achieve a target bandwidth to multiple subscribers over a total l...

Page 16: ...ual loop length and gauge NOTE In order to predict the expected bandwidth as accurately as possible it is recommended to use the Optimized Bandwidth Analysis button in the lower right corner of the Ca...

Page 17: ...3 and ETSI TS 101 830 1 Power Draw Maximum power drawn is 150 mW per pair from the 48V sealing current from the DSLAM MSAN Regulatory Compliance UL CSA FCC part 15 Class A and CE Mark Tip Ring Over vo...

Page 18: ...e and can easily be mounted on a pole attached to a strand wire or even installed in an existing cabinet or pedestal Both units share the following features Sealed IP 65 enclosure Integrated Primary L...

Page 19: ...d perform system ground per local company policies and practices Loop Resistance the actual loop resistance between the DSLAM and the BRX XLR should be verified at the time of the splicing No Split Pa...

Page 20: ...ire having the bandwidth increased or not The following diagram illustrates how the BRX XLR can be inserted between a DSLAM or MSAN and the subscribers it serves Looking at the diagram below the BRX X...

Page 21: ...completeness against your purchase order Notify your supplier immediately if any items are missing Note Please save packing material All equipment returned must be packed with the original packing mat...

Page 22: ...sistant enclosure Please refer to the diagram below for a summary of the device NOTE the BRX XLR 1 shares the same enclosure and installation instructions as the BRX XLR 2 Figure 13 BRX XLR 1 and 2 co...

Page 23: ...ection Description NOTE After step 4 the DSLAM and the CPE will retrain the circuit and bring up the ADSL2 ADSL link with the higher bandwidth The BRX XLR 2 comes with additional optional kits to faci...

Page 24: ...to adjust the strand mount bracket to clear any cables or devices already present Span between the strand and the BRX XLR 2 can vary from 3 9 76 228 mm Strand Diameter can range from 6 6 mm to 3 8 10...

Page 25: ...proper technique to ensure a good quality splice You should follow the standard splicing Method and Procedure in place Secure the strand mount bracket to the BRX XLR 2 enclosure by using the round hol...

Page 26: ...edestal at the splice point other sections of the cable pairs or binder may not be grounded Grounding of the sheath also needs to be done properly Grounding the BRX XLR units is not sufficient to miti...

Page 27: ...also bond the enclosure cabinet or pedestal to the multi grounded neutral wire Figure 17 Grounding and Bonding next to Power Utility Pole Each BRX XLR unit mounted on a pole or installed directly on a...

Page 28: ...s on Tip Ring or Ring Ground or Tip Ground Another potential problem is that copper pairs may not have been properly balanced An unbalanced pair is more susceptible to Power induction and noise Based...

Page 29: ...pair at the BRX XLR should be greater than 35Vdc If any of these measurements are not met you should make the corrections as per your corporate standard procedure and re verify 2 The user CPE loses s...

Page 30: ...verify B Performance Problems not achieving the expected bandwidth gains 4 With the BRX XLR installed on the copper loop the downstream and or upstream performance is not meeting the expected improvem...

Page 31: ...the BRX XLR is fully compliant with the allowed spectrum mask defined for ADSL and ADSL2 the interference is the result of the amplified signal impacting the weaker signal from the DSLAM on adjacent p...

Page 32: ...y the loop length of each pair Significant differences between pairs will induce jitter latency which will impact the achievable total bandwidth All pairs in the bonding group need to be amplified by...

Page 33: ...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 Verify that the lightning...

Page 34: ...er Noise measured on the line is lower than 80dBrnc Verify that the Circuit Noise measured on the line is lower than 20dBrnc Verify that the BRX XLR chassis grounding is properly made Bad grounding ma...

Page 35: ...rmation can be found in your Positron Access customer web portal http www positronaccess com Portal php Positron Access Solutions Sales Pricing Availability and Technical Support US and Canada 1 888 5...

Page 36: ...BRX XLR 1 pair module with primary lightning protection enclosed in IP 65 enclosure BRX XLR 2 BRX XLR 2 pair module with primary lightning protection enclosed in IP 65 enclosure Ancillary Parts BRX XL...

Page 37: ...is a direct relation between INPMin and symbol rate such that higher values of INPMin will restrict the DSL circuit to a lower maximum bit rate This relationship is dependent in part on the interleavi...

Page 38: ...total overhead that will exist on the line The tables below from ITU T G 992 5 Annex K illustrate how the net data rate is affected as the INP Min and Max delay are varied The bitrates in these tables...

Page 39: ...BRX XLR User Guide 38 180 0145 001 R01 Extended Framing Parameters Table 12 Maximum Downstream Attainable Rate with 24K Interleaving and Extended Framing Parameters...

Page 40: ...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 M Ring to Ground Insulation Resistance Ohms 5 M Tip to Ring...

Page 41: ...SNR Margin 6 0 dB 6 0 dB Minimum SNR Margin 3 0 dB 3 0 dB SNR Margin Upshift 9 0 dB 9 0 dB SNR Margin Downshift 3 0 dB 3 0 dB Bit Swapping Enabled Enabled Table 14 Recommended ADSL Test Set Profile Se...

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