EBTW05 EBTW05 DSL CPE Module A unique solution for enabling board functional test of existing & emerging DSL technologies. EBTW 2005, Tallinn, Estonia Slide 1
EBTW05 EBTW05 Introduction • What is DSL? • What is a DSLAM and where does it fit in the network? • Original DSLAM test model. • Problems & The Solution - CPEM. • CPEM – Key features. • CPEM – Key benefits. • Revised DSLAM test model. • CPEM – Adoption. • Summary. • Q & A. EBTW 2005, Tallinn, Estonia Slide 2
EBTW05 EBTW05 What is DSL? • Broadband = D igital S ubscriber L ine. • Broadband = D igital S ubscriber L ine. • xDSL = Catchall for all DSL flavours (ADSL, HDSL, RADSL, etc.). • xDSL = Catchall for all DSL flavours (ADSL, HDSL, RADSL, etc.). • CPE = C ustomer P remises E quipment. • CPE = C ustomer P remises E quipment. • COE = C entral O ffice E quipment. • COE = C entral O ffice E quipment. • Uses normal copper telephone lines for path. • Uses normal copper telephone lines for path. • Makes use of frequencies above normal voice range (> ~3.4KHz). • Makes use of frequencies above normal voice range (> ~3.4KHz). • Provides data rates of upto 50Mbps (>800 x faster than 56k modems). • Provides data rates of upto 50Mbps (>800 x faster than 56k modems). • Very sensitive to signal degradation: • Very sensitive to signal degradation: • Very sensitive to signal degradation: distance from CPE to DSLAM for ADSL = 18 Kft/5.5 Cable length (maximum distance • • Cable length (maximum from CPE to DSLAM for ADSL = 18 Kft/5.5 Cable length (maximum distance from CPE to DSLAM for ADSL = 18 Kft/5.5 • Km). Km). Km). • • Cable quality. Cable quality. • Cable quality. • • Number of cable breaks and joins. Number of cable breaks and joins. • Number of cable breaks and joins. EBTW 2005, Tallinn, Estonia Slide 3
EBTW05 EBTW05 What is a DSLAM & where does it fit in the network? • DSLAM = DSL DSL A A ccess ccess M M ultiplexer. ultiplexer. • DSLAM = • DSLAM = DSL A ccess M ultiplexer. • Aggregates connections from many customers onto a single, connections from many customers onto a single, • Aggregates • Aggregates connections from many customers onto a single, high- high - capacity connection capacity connection on onto to the IP or ATM network the IP or ATM network. . high-capacity connection onto the IP or ATM network. • Flexible and able to support multiple types of DSL in a single and able to support multiple types of DSL in a single • Flexible • Flexible and able to support multiple types of DSL in a single central office. . central office central office. USER EBTW 2005, Tallinn, Estonia Slide 4
EBTW05 EBTW05 Original DSLAM Test Model TRAFFIC SINK DUT DSLAM TRAFFIC SOURCE STINGER FS+ DATA DATA DESTINATION SOURCE CPE CPE DEVICES DEVICES DATA DATA Downstream data path test (COE � CPE): Upstream data path test (CPE � COE): Downstream data path test (COE � CPE): Upstream data path test (CPE � COE): • ATM ingress via a copper or fibre trunk. • Ingress via a bank of CPE devices • ATM ingress via a copper or fibre trunk. • Ingress via a bank of CPE devices connected to DSLAM DSL modems. connected to DSLAM DSL modems. • Routed through DSLAM. • Routed through DSLAM. • Aggregated and routed through DSLAM. • Aggregated and routed through DSLAM. • Egress via bank of CPE devices connected • Egress via bank of CPE devices connected to DSLAM DSL modems. • Egress onto the ATM backbone. to DSLAM DSL modems. • Egress onto the ATM backbone. EBTW 2005, Tallinn, Estonia Slide 5
EBTW05 EBTW05 DSLAM Test Model – Measurements • Upstream/Downstream throughput rates Upstream/Downstream throughput rates. . • • Upstream/Downstream throughput rates. • Synchronization Synchronization speed speed. . • • Synchronization speed. • Line Attenuation Line Attenuation. . • • Line Attenuation. • SNR (Signal to Noise Ratio) SNR (Signal to Noise Ratio). . • • SNR (Signal to Noise Ratio). • Noise Margin Noise Margin. . • • Noise Margin. • Upstream/Downstream power Upstream/Downstream power. . • • Upstream/Downstream power. • Bit Error Bit Error R Rate ate (BERT) (BERT) performance performance. . • • Bit Error Rate (BERT) performance. EBTW 2005, Tallinn, Estonia Slide 6
EBTW05 EBTW05 The Problem & The Solution - CPEM The Problems: The Problems: The Problems: • Multiple xDSL variants – – too many variants. too many variants. • Multiple xDSL variants • Multiple xDSL variants – too many variants. • DSLAM Density – – too many ports. too many ports. • DSLAM Density • DSLAM Density – too many ports. • Modular Solution – – nothing nothing ‘ ‘off the shelf off the shelf’ ’. . • Modular Solution • Modular Solution – nothing ‘off the shelf’. • ADSL2+ CPE Readiness – – nothing available. nothing available. • ADSL2+ CPE Readiness • ADSL2+ CPE Readiness – nothing available. EBTW 2005, Tallinn, Estonia Slide 7
EBTW05 EBTW05 The Problem & The Solution - CPEM The Problems: The Problems: The Problems: • Multiple xDSL variants – – too many variants. too many variants. • Multiple xDSL variants • Multiple xDSL variants – too many variants. • DSLAM Density – – too many ports. too many ports. • DSLAM Density • DSLAM Density – too many ports. • Modular Solution – – nothing nothing ‘ ‘off the shelf off the shelf’ ’. . • Modular Solution • Modular Solution – nothing ‘off the shelf’. • ADSL2+ CPE Readiness – – nothing available. nothing available. • ADSL2+ CPE Readiness • ADSL2+ CPE Readiness – nothing available. The Answer: The Answer: The Answer: • Multiple Port CPE Module that fits in with DSLAM • Multiple Port CPE Module that fits in with DSLAM • Multiple Port CPE Module that fits in with DSLAM architecture. architecture. architecture. EBTW 2005, Tallinn, Estonia Slide 8
EBTW05 EBTW05 CPEM – Key Features Key Features : Key Features : Key Features : • • Based on Conexant Argon 330 reference design. Provides: Based on Conexant Argon 330 reference design. Provides: • Based on Conexant Argon 330 reference design. Provides: o o xDSL WAN interface, and xDSL WAN interface, and o xDSL WAN interface, and o o IP LAN interface. IP LAN interface. o IP LAN interface. • • 28 single channel (identical) CPE devices on 1 card. 28 single channel (identical) CPE devices on 1 card. • 28 single channel (identical) CPE devices on 1 card. o o 24 usable at any time (4 spares). 24 usable at any time (4 spares). o 24 usable at any time (4 spares). • • Individually upgradeable firmware. Individually upgradeable firmware. • Individually upgradeable firmware. EBTW 2005, Tallinn, Estonia Slide 9
EBTW05 EBTW05 CPEM – Key Benefits Key benefits: Key benefits: Key benefits: • Out the box ADSL2+ support. • Out the box ADSL2+ support. • Out the box ADSL2+ support. • Uses DSLAM form factor. • Uses DSLAM form factor. • Uses DSLAM form factor. • Firmware upgradeable for: • Firmware upgradeable for: • Firmware upgradeable for: o Support of multiple DSL flavours, and o Support of multiple DSL flavours, and o Support of multiple DSL flavours, and o Future compliance to emerging DSL standards. o Future compliance to emerging DSL standards. o Future compliance to emerging DSL standards. • Multiple configuration modes supported: • Multiple configuration modes supported: • Multiple configuration modes supported: o HTTP (Web Browser) o HTTP (Web Browser) o HTTP (Web Browser) o CLI/CIT. o CLI/CIT. o CLI/CIT. o Over LAN, and o Over LAN, and o Over LAN, and o Over serial connection. o Over serial connection. o Over serial connection. • Eliminates dependence on OEM CPE devices. • Eliminates dependence on OEM CPE devices. • Eliminates dependence on OEM CPE devices. EBTW 2005, Tallinn, Estonia Slide 10
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