aurora presto introduction adsl technology overview & product presentation
TRANSCRIPT
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AuroraPresto
Introduction
ADSL Technology Overview
& Product Presentation
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Asymmetrical DSL
ADSL
GLite
RADSLAsymmetrical DigitalSubscriber Loop
SplitterlessADSL
RateAdaptiveADSL
VDSLVery high bit rate ADSL
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Asymmetrical DSL
standard ADSL
standard offering requiring operator installation
GLite
splitterless for customer installation in PCs
RADSL
rate adaptive, maximising current line potential
VDSL
for use in business and residential blocks
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Downstreambits/s
Upstream
bits/s
ADSL
G.Lite
RADSL
VDSL
640k
512k
128k – 1M
2M
8M
1.5M
1M – 12M
13M
Rangekm
6
1.5
6
6
- 26M 1.0
13M 52M 0.3
ADSL Line Performance
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The Copper/Digital Local Loop
Exchange
DSL
NTU
DSL
LTUMDF CCP SDP
CustomerDigital Local Loop Premises
exchangecable
maincable
distribution
cable
installation
cable
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ADSL technology overview
Carrier-less Amplitude Phase vs Discrete Multi-Tone Bundle interference (spectral incompatibility) Dynamic Retraining
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ADSL technology overview
ADSL over POTS ADSL over ISDN Through-put (U/S:D/S rates)
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ADSL technology overview
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Typical ADSL applications
ATU-C/DSLAM
ATU-R/Customer
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Typical ADSL applications
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ADSL service limiting factors
Noise (conducted)
Noise (induced/RFI)
Cross-talk (Near/Far)
Inter-operability
Line code (CAP v DMT)
DSLAM/ATU-C settings
Balance
Load coils/taps
Hi Z/Lo Z
Non-uniform pairs
Pair length
Copper diameter
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ADSL technology overview
Effects of noise on ADSL spectrum BIN retraining Problems: T1, E1, HDSL in same bundle
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ADSL layered system technology
Copper Pair
DSL Modulation
ATM layer
IP layer
OptionalTCP/IP layer
Data transportLayer
Data LinkLayer
Link Hardware
Application layers:- MPEG3video, Internet access
protocols etc.
Multi-layer service presentation ADSL > ATM > IP > PPP Test needs - all technologies
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Trend’s xDSL Products
DSL Service Testing
Analogue Copper Testing
Advanced Analogue Copper
Testing
ATM Test