1. Next Generation DSLAM IP-DSLAM Next Generation DSLAM IP-DSLAM Huawei Technologies Co., Ltd. www.huawei.com Ashraf AboulWafa elwafa@huawei.com

2.  New Opportunity New Challenge  New Generation DSLAM - IP DSLAM  Huawei IP DSLAM Solutions

3. Technical Background normal twisted pair DSL is a data transport technology to provide high bit-rate data speed over normal twisted pair by using high frequency modulation and demodulation. Based on the existing copper lines infrastructure, DSL is widely adopted by carriers, to provide broadband services (including broadband Internet access and broadband leased line services ) to the end users. Based on the existing copper lines infrastructure, DSL is widely adopted by carriers, to provide broadband services (including broadband Internet access and broadband leased line services ) to the end users.

4. POTS --4000 Hz (20,000m) POTS --4000 Hz (20,000m) VDSL 0.138 MHz--5.2 MHz (1,000m) VDSL 0.138 MHz--5.2 MHz (1,000m) HomePNA 5.5 MHz--9.5 MHz (100m) HomePNA 5.5 MHz--9.5 MHz (100m) ADSL 26 kHz–1.1 MHz (5,000m) ADSL 26 kHz–1.1 MHz (5,000m) Frequency PowerPower Technical Background G.SHDSL -- 2.3MHz (5,000m) G.SHDSL -- 2.3MHz (5,000m)

5. Driving Forces for DSL Development DSL New services Technologies Demands competition

6. DSL Growth worldwide According to “Gartner” Dataquest: In 2005, DSL market will reach up to 16 million Lines. Kline200020012002200320042005 ADSL 13,05613,10812,873136221416714623 SDSL 2070580410265167137 G.SHDSL 983736409561,208 VDSL 74144264386495

7. DSL in China

8.  New Opportunity New Challenge  New Generation DSLAM - IP DSLAM  Huawei IP DSLAM Solutions

9. DSL Access - xDSL IP Core Layer ATM/IP Convergence Layer ATM DSLAM iTELLIN/iManager EVDSLG.SHDSLADSLADSLEVDSLG.SHDSL IP DSLAM

10. Only provide an IP uplink interface, Difficult for ATM switch fabric to support multicasting service Difficult to cascade DSLAM 3 rd Generation ADSL DSLAM: 1) ATM Service Interfaces 2) Ethernet Bus and L3 Switch Fabric 3) IP Uplink Interfaces 1st Generation ADSL DSLAM: 1) ATM Service Interfaces 2) ATM Cell Bus and ATM Switch Fabric 3) ATM Uplink Interfaces 2 nd Generation ADSL DSLAM: 1) ATM Service Interfaces 2) ATM Cell Bus and ATM Switch Fabric 3) IP Uplink Interfaces Evolution of ADSL DSLAM ？ IP, The Main Direction of Broadband Development

11. Why IP DSLAM -- Services Based on IP VOD ： Video On Demand WEB TV ： Surfing E-MAIL Shopping On WEB BTV:Broadcasti ng TV Many TV Channels MTV ： Multicasting TV Live Program Remote Learning MOD ： Music On Demand GOD ： Game On Demand Video services and interactive services need high bandwidth and are based on IP technique.

12. Why IP DSLAM – IP Backbone is the Trend  Existing ATM backbone can’t meet the increasing ATM-DSLAM.  Metro network, broadband service are migrating to IP, Access layer also is submitted to this IP trend.  Broadband services, such as VOD 、 MOD 、 GOD 、 Video Conference 、 WEB TV, are based on IP. ATM Backbone IP Backbone Backbone Layer Access Layer ？ Service Center  Remote Learning  Video Conference  Web TV  Web Game

13.  IP-DSLAM Deployment, in Guangdong Province Expansion in 2002.3, IP-DSLAM: 40%(about 160,000 lines)  IP-DSLAM Deployment, in Jiangsu Province IP-DSLAM: 40%(about 100,000 lines)  IP-DSLAM Deployment, in Zhejiang Province IP-DSLAM: 30%(about 150,000 lines)  IP-DSLAM Deployment, in Tianjin City Expansion in 2002.1, IP-DSLAM: 100%(about 60,000 lines) o IP-DSLAM Deployment, in Henan Province IP-DSLAM: 70%(about 80,000 lines) Why IP DSLAM – IP DSLAM in China

14. DSLAM Network model (1G, 2G, 3G) IP BACKBONE Authentication Center Broad Band Access Server GE 622M ATM 155M ATM Backbone ATM switch Edge ATM switch 1 st Generation DSLAM IP BACKBONE GE 100BaseTX Backbone L3 switch Edge L3 switch 2 nd Generation DSLAM GE 3 rd Generation DSLAM GE/FE NMS Province Backbone BAS Backbone L3 switch IP BACKBONE Edge L3 switch

15. Technical Structure of 2 nd & 3 rd Generation DSLAM ATM switch ADSL G.SHDSL VDSL ADSL LAN service board 2 nd Gen. DSLAM ： IP Uplink only Ethernet Switch ADSL VDSL ADSL GE/FE Compatible with xDSL international standard 3 rd Gen. DSLAM ： IP in UNI Compatible with Ethernet and IP international standard G.SHDSL GE/FE

16. IP DSLAM’s Work Principal based on ATM Structure ATM METRO NET LAN RACK ADLADL ADLADL VDLVDL ADLADL ADLADL VDLVDL ADLADL ADLADL ADLADL ATM switching cell BUS 1483B/PVC L3/BAS ADSL Modem ATM SAR IP metro NET LanSwitch Main control & switch Fabric

17. IP METRO NET LanSwitch ADLADL ADLADL VDLVDL Main control board 1483B/PV C L3/BAS ADSLMode m Ethernet backboard ATM SAR ADLADL Lansw itch IP DSLAM’s Work Principal based on ETHERNET Structure

18. Summary of DSLAMs characteristics Items1 st DSLAM2 nd DSLAM3 rd DSLAM Costhighesthighlow OSS ability provide subscribers management through external BRAS, introducing additional investment; less security. provide subscribers management through external BRAS, introducing additional investment. internal 802.1x authentication ， distributed authentication to improve network security. Leased line supporting ability strong Weak （ limited VLAN_ID quantity, weak QoS guarantee) strong （ 4k 802.1q VLAN ； 64kbps granularity bandwidth control ） IP service (multicast) supporting ability weakweakerstrong Expansion capability Stronger (expanded through star cascade of internal BUS, but limited by the uplink capability ） weaker （ commonly not supporting cascade ） strong （ L3 structure, cascade expansion through any way, up link supports GE interface, large port capacity, support port binding ） QoSstrongweakerStrong. 64kbps granularity bandwidth control; error <=5 ％

19.  New Opportunity New Challenge  New Generation DSLAM - IP DSLAM  Huawei IP DSLAM Solutions

20. MA5100 Multi-service access equipment B-RAS series MA5103 Multi-service access equipment ISN 8850 large capacity MA5105 Mini DSLAM S3026V VDSL access unit MA5200F small capacity MA5300 ADSL/VDSL access unit MA5303 Huawei DSL Products Overview ESR 8825 medium capacity SmartAX access series

21. MA5300 with Built in BAS BAS MA5300 MA5100 ADSL VDSL G.SHDSL Ethernet L2 MA5300 ADSL VDSL G.SHDSL Ethernet iManager N2000 NMS MA5300 MA5100 ADSL VDSL G.SHDSL Ethernet Networking of Huawei DSL Products

22. Typical Networking: End Office Application MA5300 is located at the end office: providing access for users in ordinary residential areas with ADSL as the main access mode, providing ADSL access for nearby medium/small enterprises and commercial users, and providing LAN access for individual users in high-grade residential areas. High-grade residential area Nearby enterprises and commercial users MA5300 LAN FE EVDSL ADSL Ordinary residential areas End office ADSL PSTN end office ISN8850/MA5200 WAN backbone

23. Leased Line SolutionCORE S6506 iTELLIN OpenDSE Users are identified based on VLAN and different service priorities are provided for different users. Users with high priority need not be authenticated and can obtain the quality of private line service. VLAN 1 Priority:1 Private line VLAN 2 Priority:0 VLAN 3 Priority: 2 Private line Internet MA5300

24. VPN SolutionS6506S6506 Ordinary users MA5300 MA5300 802.1QVLAN 802.1QVLAN Headquarters Branch VLAN: 1 VLAN: 2 VLAN: 3 VLAN: 1 Trunk iTELLIN OpenDSE Global VLAN

25. ATM/IP Core iManager N2000 xDSL Access MA5105 ETH Access S3000/2000S3026V L3 MA5300/5306 MA5200F MA5100 VDSL/ADSL/FE ADSL /G.SHDSL/FR/CES/FE MA5100/5103 ADSL STM-1/ GE/FE FE GE/FE FE VDSL IMA/E1/FE Radium8750 WLAN 10M/100M xDSL Access Smart Access Smart Service Smart Management IMA/STM-1 ISN8850/ ESR8825 GE/FE Smart Broadband Network Solution

26. internet Access Layer ATM/IP Core FE ISN8850 MCU GK MA5100 MA5200F MA5100 Router Lanswitch N*64K CES LAN FireWire 802.1P FR Router Lanswitch FireWire 802.1P802..1Q H.323 terminal H.320 terminal FE FE Enterprise network Different Service by different PVC Support CAR Video conference Solution LAN H.323 terminal Different Service by different VLAN

27. Multicast using IGMP Snooping Internet MA5100 MA5300 ADSL/VDSL ADSL/VDSL IGMP Snooping IGMP Snooping  Utilizing backplane bus to make multicast easily.  Multicast packets are duplicated on individual board, which is more reliable and effective. Internal special ASIC intercept IGMP packet Automatically set up and maintenance multicast forwarding table Internal special ASIC intercept IGMP packet Automatically set up and maintenance multicast forwarding table Tele-educationvideo network TV game online Multicast router program resources program resources