Aurora Presto Introduction ADSL Technology Overview & Product Presentation
Asymmetrical DSL ADSL GLite RADSL Asymmetrical Digital Subscriber Loop Splitterless ADSL Rate Adaptive ADSL VDSL Very high bit rate ADSL
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
Downstream bits/s Upstream bits/s ADSL G.Lite RADSL VDSL 640k 512k 128k – 1M 2M 8M 1.5M 1M – 12M 13M Range km 26M 1.0 13M 52M 0.3 ADSL Line Performance
The Copper/Digital Local Loop Exchange DSL NTU DSL LTU MDFCCPSDP CustomerDigital Local Loop Premises exchange cable main cable distribution cable installation cable
ADSL technology overview Carrier-less Amplitude Phase vs Discrete Multi-Tone Bundle interference (spectral incompatibility) Dynamic Retraining
ADSL technology overview ADSL over POTS ADSL over ISDN Through-put (U/S:D/S rates)
ADSL technology overview
Typical ADSL applications ATU-C/DSLAM ATU-R/Customer
Typical ADSL applications
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
ADSL technology overview Effects of noise on ADSL spectrum BIN retraining Problems: T1, E1, HDSL in same bundle
ADSL layered system technology Multi-layer service presentation ADSL > ATM > IP > PPP Test needs - all technologies
Trend’s xDSL Products DSL Service Testing Analogue Copper Testing Advanced Analogue Copper Testing ATM Test