What Does an MSAN Give You Tuesday April

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What Does an MSAN Give You Tuesday, April 13, 2010

Definition of an MSAN A 'Multi-Service access node' or (MSAN) also known as MSAG or 'Multi-Service Access Gateway' is a device typically installed in a telephone exchange (although sometimes in a roadside serving area interface cabinet) which connects customers' telephone lines to the core network, to provide telephone, ISDN, and broadband such as DSL all from a single platform. Typical outdoor MSAN cabinet consists of Narrow. Band (POTS), Broad. Band (x. DSL) services, batteries with rectifiers, optical transmission unit and copper distribution frame. Referenced: http: //en. wikipedia. org/wiki/MSAN ® Adtran, Inc. 2008 All rights reserved 2

The Access Network Many Pieces of the Access Network Puzzle – – – Next Gen Network Migration To Retrofit or not Copper and fiber Multi-play service delivery No single solution for all networks – FTTP – FTTN – Transport – star, chain, ring Network Solutions to Build on Service delivery is key Minimize Friction ® Adtran, Inc. 2008 All rights reserved 3

Next Generation Networks Ethernet-based Access Network Fiber to the Premises (FTTP) Fiber to the Node (FTTN) Triple Play Services 20 -100 Mbps per subscriber Fiber to the Home (FTTH) ® Adtran, Inc. 2008 All rights reserved 4

Drivers for FTTx Growth Demand for bandwidth – Predominately driven by video applications, peer-to-peer (P 2 P) file sharing and online gaming – Allows service providers to differentiate on wider content Government subsidies – Ongoing national initiatives to support deep fiber access – Japan, Korea, China, Singapore, Malaysia, Australia and France – US Broadband Stimulus is North America’s first push Reduced operational costs of maintaining legacy copper based services – Eliminates distance sensitivity and largely eliminates asymmetrical nature of services (bigger upstream for P 2 P and Online Gaming) – Less active equipment in the network to serve a large base of customers ® Adtran, Inc. 2008 All rights reserved 5

GPON and Active Ethernet $600 ADTRAN Addressable Market GPON and Active Ethernet $500 $400 $300 $200 $100 $0 2009 2010 OLT GPON 2011 Active E Aggregation 2012 2013 Global products available in 2 nd half driving increased market share moving forward ® Adtran, Inc. 2008 All rights reserved 7

Integrated Business and Residential Services OSS Common platform for Residential and Business Services ADTRAN Total Access Element Management System 1/10 GE Scalable architecture for future services Residential VDSL 2 Access agnostic architecture for “Ethernet Everywhere” AD SL 2 Eo. TD F Eo N PO G u Eo. C M + Business Single Common Platform and Management for All Services ® Adtran, Inc. 2008 All rights reserved 11

IPDSLAM OSS IPDSLAM Gig. E Management Gateway -Optional bonding of pairs for enhanced rate/reach -Integrated fiber or copper transport options -Smaller, lower density units to minimize the deployment cost (OPEX) TA 5000 Gig. E TA 1448 A 12 Pair DMT TA 1248 A TA 1148 A ADSL 2+ Bonded ADSL 2+ ® Adtran, Inc. 2008 All rights reserved ADSL 2+ Bonded ADSL 2+ TA 1148 A DMT ADSL 2+ Bonded ADSL 2+ 12

FTTN OSS Gig. E Management Gateway TA 5000 Gig. E FTTN TA 1448 A 12 Pair DMT TA 1248 A -Better scalability for lower density deployments TA 1148 A -Unique sealed architecture helps DMT ADSL 2+ minimize first port ADSL 2+ deployment costs Bonded ADSL 2+ ® Adtran, Inc. 2008 All rights reserved Bonded ADSL 2+ Gig. E Bonded ADSL 2+ TA 1248 V TA 1148 V VDSL 2 Bonded VDSL 2 13

FTTH OSS Gig. E Active Ethernet / GPON Management Gateway TA 5000 TA 3 xx Gig. E TA 1448 A FTTH 12 Pair Gig. E DMT TA 1248 A ADSL 2+ Bonded ADSL 2+ ® Adtran, Inc. 2008 All rights reserved -Differentiated ONT portfolio with TA 1248 V purpose built residential, business and mobile backhaul solutions -Ability. TA 1148 A to support TA 1148 A IP DMT DSLAM, FTTN and FTTH from ADSL 2+ platform same VDSL 2 ADSL 2+ Bonded ADSL 2+ Bonded VDSL 2 TA 1148 V VDSL 2 Bonded VDSL 2 TA 3 xx VDSL 2 Bonded VDSL 2 14

Migration of Legacy Services to Ethernet Business Customers OSS Gig. E Management Gateway Ch DS 3 Business Service Migration -Migration of TDM based (DS 1/E 1) legacy data services (PPP, Frame Relay, ATM) -No new customer premises based equipment -Migrate existing data traffic from existing inter-office transport and DACS to IP/MPLS Core TA 5000 DS 1 E 1 TDM ACCESS DS 1 Data Circuit ® Adtran, Inc. 2008 All rights reserved DS 1 Data Circuit E 1 Data Circuit 16

Migration of Legacy Services to Ethernet Residential Customers OSS Gig. E DS 3/OC 3 ATM Management Gateway Ch DS 3 TA 5000 DS 1 E 1 Residential Service Migration TDM -Extend the life of. ACCESS ATM existing DSLAMs for customers still buying lower rate services (< 7 M-10 M) -Intelligent learning to build ATM circuit to Ethernet VLANs -Migrate existing data traffic from DS 1 existing inter-office DS 1 transport and. Data Circuit DACS to IP/MPLS Core ® Adtran, Inc. 2008 All rights reserved DS 3/OC 3 ATM T 1/E 1 IMA ATM Existing ATM DSLAMs E 1 Data Circuit 17

Ethernet Access Solutions OSS Ethernet over Copper Gig. E Management Gateway TA 5000 -Bonded copper pairs for Ethernet access up to 40 Mbps+ symmetric -Optimized Mobile backhaul form factors for cell site deployment -Enhanced lightning protection -Hardened outdoor enclosures Bonded E. SHDSL NV 838 OSP ® Adtran, Inc. 2008 All rights reserved 18

Extending Carrier Ethernet Footprint Ethernet over TDM OSS Gig. E Management Gateway -Bonded TDM circuits from existing infrastructure offering up to 135 Mbps symmetric -Extends Ethernet service reach TA 5000 DS 3 DS 1/E 1 Bonded E. SHDSL Ch DS 3 Bonded E. SHDSL TDM ACCESS NV 838 Bonded DS 3 NV 838 OSP Bonded DS 1/E 1 NV 873 NV 818 ® Adtran, Inc. 2008 All rights reserved 19

Extending Eo. Cu Reach OSS Ethernet over Copper from the RT Gig. E Management Gateway -Size and density optimized for deployment at existing cabinet sites -Enables bonded copper pairs for Ethernet access offering up to 40 Mbps symmetric -Consistent feature set and OSS integration with existing Carrier Ethernet deployment -Offers targeted migration from Ethernet over TDM solution TA 5000 Gig. E Bonded E. SHDSL TA 1448 S-CE Bonded E. SHDSL NV 838 OSP ® Adtran, Inc. 2008 All rights reserved NV 838 EP 20

Enabling Fiber-based Ethernet Access Gig. E or 10 G OSS Management Gateway TA 5000 Eo. Cu Gig. E DS 3 Gig. E DS 1/E 1 Bonded E. SHDSL Ethernet over Fiber -Ethernet Access Module for aggregation of fiber NV 838 Ethernet services -Dark fiber Ethernet access for service offerings up to 1 G NV 838 OSP -Hybrid copper/fiber Ethernet NCTE allows rapid deployment of Ethernet over Copper with upgrade path to Ethernet over Fiber (40 M to 1 G) without changing NCTE -High bandwidth (10 G) uplink options to support blending of Ethernet over X solutions ® Adtran, Inc. 2008 All rights reserved Hybrid NTU Ch DS 3 TDM ACCESS Fiber NTU Bonded DS 3 Bonded DS 1/E 1 NV 873 NV 818 21

Breadth of Services Broadband Access Services Migration • All Ethernet Core Product – Highly scalable Ethernet switch fabric VDSL 2 Combo – All services converted to Ethernet ADSL 2+ Combo for maximum scalability DS 1 MS DS 3 1 port Voice Gateway CH DS 3 MS • Carrier-class platform RPOTS DS 1 PWE GPON – Performance – Redundancy – Hardened Active E DS 3 4 port OC 3 1 port Quad OLT • Supports legacy and advanced RPR packet services Gig. E T-1 • Services are moving to IP and Ethernet HDSLthe most efficient is ESHDSL DS 1 DS 3 transport medium OC 3 4 port CH DS 3 Gig. E 8 port Carrier Ethernet ® Adtran, Inc. 2008 All rights reserved 22

Ethernet End-to-End End-to-end network using standard 802. 1 Q VLANs Converged Service Delivery Data Serving CO or RT GE or 10 GE Transport COT Vo. IP Video Per HSI Node TA 5000 Nx. GE or 10 GE LACP Vo. IP Video VLAN Gold Silver HSI VLAN Bronze Core Video BNG/ BRAS Voice Set-top Box • IGMP Snooping at and within each Total Access 5000 Node • Channels only present when viewed • Support for multiple middleware vendors ® Adtran, Inc. 2008 All rights reserved 23

Enabling Advanced Service Delivery Ethernet creates a scalable architecture – True multi-play architecture – Transport and uplink to 10 Gbps for ultra high-speed service delivery Ubiquitous service delivery over copper and fiber ® Adtran, Inc. 2008 All rights reserved 24

Total Access 5000 • Multi-Service Access and Aggregation Platform – Broadband Access • Broadband Loop Carrier • IP/Ethernet DSLAM • Fiber to the Premises – Services Migration • ATM Aggregation and Interworking • Business Service Migration • Switch Collapse – Carrier Ethernet • Ethernet over Copper • Ethernet over TDM • Ethernet over Fiber • Helping carriers deliver new revenue generating services and reduce operational expenses • Op-Ex – one platform, multiple services ® Adtran, Inc. 2008 All rights reserved 26

Unprecedented Success Total Access 5000 – Integrated into all three Tier 1 s ATM to Ethernet Interworking – IP DSLAM BBDLC – FTTN / FTTP Ethernet over Copper and TDM – Tier II Approved, Deployed or FOA in four of five MSAP – Tier III & CLEC Approved, Deployed in over 100 companies MSAP Over 5, 200 Total Access 5000 s deployed Early in product lifecycle – Tremendous upside – Flagship product ® Adtran, Inc. 2008 All rights reserved 27

Fundamentally Different Ethernet based MSAP – Highly scalable Ethernet switch fabric – All services converted to Ethernet on access modules – SM natively switches Ethernet – No resources modules to add services Carrier-class platform – – – Chassis-based system Performance Redundancy Serviceability Hardened Supports legacy and advanced packet services Designed for an all IP future ® Adtran, Inc. 2008 All rights reserved 28

System Architecture Fully redundant dual star bus backplane Common Control – Native IP/Ethernet architecture – Up to 20 Gbps per slot bi-directional – Three (3) common control slots with carrier class redundancy – Twenty-One (21) configurable access slots Physical – 23” rack mount – 15. 75” height (9 RU) – Environmentally hardened for Central Office or OSP deployment Access Modules Capacity to meet future bandwidth demands ® Adtran, Inc. 2008 All rights reserved 29

Flexible Transport Options • Many Transport Options – All Ethernet based – BBDLC, IP DSLAM, and Ethernet Services are supported • Ethernet Ring – 2. 5 Gb RPR – 10 Gb ERPS GR 303 TR 008 MGCP SIP 1 to 10 Gig. E 2. 5/10 G Ring COT • Gigabit Ethernet Star – Scale with Quad GE Line Module Gig. E • Gigabit Ethernet Linear Chain – Fiber starved environments Sub-ring support – From RT nodes Gig. E All Fully Redundant Intra-nodal 2. 5 G connections – Quad GE – SM Chain ® Adtran, Inc. 2008 All rights reserved 30

ERPS Access Ring Ethernet Ring Protection Switching 10 G Link Aggregation – ITU-T G. 8032 standards based – Fully redundant – 10 Gbps line rate with 10 Gbps throughput on the ring – 10 Gbps add/drop from each span – Interface via XFP cages on faceplate of SM – All Ethernet solution Integrated transport – Transport and uplink on SMs – Redundant hardware and path Same UI, point-to-point buses – East and West Advanced capabilities – Topology Aware Easy adds and deletes No single point of failure – Misconfiguration Detection – Wait to Restore (WTR) East and West 10 G ERPS ® Adtran, Inc. 2008 All rights reserved 31

Leveraging SONET • Utilize SONET network for transport • COT or RT connectivity • Up to 4 bonded DS 3 uplink 1 to 10 Gig. E 2. 5/10 G Ring GR 303 TR 008 COT DS 3 Gig. E EFM Bonded DS 3 s TDM / SONET Network EFM Bonded DS 3 s • Perfect for CLECing or SONET fed cabinets • Scales as an aggregated uplink, not separate STSs • Ethernet model with TDM transport • EFM 802. 3 ah ® Adtran, Inc. 2008 All rights reserved 32

Providing Smart Connectivity for Delivery of Services Broadband Access Network Transport/Aggregation – Higher Speed Internet – Optical – IPTV / Vo. D – Ethernet – POTS / Specials – Mobile Backhaul Vo. IP/IP Telephony – Leading Softswitch Interop – Network Migration – Switch Collapse Metro Ethernet – Fiber and Copper Managed Network Services – Provisioning – Fault Management – Performance Management ® Adtran, Inc. 2008 All rights reserved 36

Beyond the Products Active Standards Participation – – – IEEE FSAN MEF DSL Forum ITU Staff Scientists drive standards – Ensure Product adherence – Push for latest technologies Combine research with realism – Understand OSP deployment realities Copper and Fiber based Innovate rather than provide “off the shelf” solutions ® Adtran, Inc. 2008 All rights reserved 37

Foundation for Success • Reliable access for today’s communications networks – Comprehensive product portfolio – Founded in 1985 – 2009 revenue $484 M • 124 M in 4 Q 09 • 18 M profit – 1, 700 employees worldwide • Traded on NASDAQ: ADTN • Product Development Locations – Huntsville, AL (Corporate HQ) – Phoenix, AZ – Mountain View, CA • Stability in tough times – > 270 M in cash – Debt free – Managing expenses ® Adtran, Inc. 2008 All rights reserved 38

More Than Just Products Benefits ADTRAN brings – – – No Maintenance Fees No Software Upgrade Fees No Tech Support Fees 10 year warranty Total Access EMS manages complete suite of ADTRAN products Large but agile – Quick turns on new product development – Engineering teams are involved with customer requirements Focused SP team – RBOCs & CLECs have dedicated teams ® Adtran, Inc. 2008 All rights reserved 39

Summary Fully Featured MSAP for Advanced Service Delivery – – – All Ethernet architecture 1 G to 10 G transport and uplinks Backplane exceeds bandwidth needs Standards-based Carrier-class chassis design Copper and Fiber Solutions for GPON and Active Eth – Breadth of ONTs – Addition of Active Ethernet – Single platform support Dedicated to Customer’s Success – 10 Year Warranty – No TAC or Software Fees – Will be here for the long haul ® Adtran, Inc. 2008 All rights reserved 40